Jim Kusznir | 1 Oct 22:13 2007
Picon

Re: Writing to DS2406

I think we're getting close.  It appeared to work from the command
prompt, but when I read memory, nothing has been changed.  I also
noticed some owfs paths coming out in the memory readback, so there
might be a bug there elsewhere, too:

root <at> eme206-05 12.588636000000 # echo -n "A Long Test Into An OWFS
Device.  Not too long though." > memory
root <at> eme206-05 12.588636000000 # cat memory
�������������������������������������������������������������������������������������������������������������������������������y~
��* <at> A <at> A��*
�*8 <at> A  <at> A`�Ҫ�*  <at> A8 <at> A <at> 4` �Ҫ�*训��*  <at> AM����*����h����*36000000/memory

����*READ path=/uncached/12.588636000000/memory size=4096 offset=0
4���8   <at> ���8
 <at> A4����(���8 <at> ���8����804`����*RELEASE
path=/uncached/12.588636000000/pages/page.0
 <at> A��� 
 <at> A��ժ�*���� <at> 0�* <at> A� <at> �
                <at> A�
 <at> A                <at> A 0
 <at> A  <at> A
 <at> Ap <at> A <at> ���*`�Ҫ�*4����* <at>  <at> A4����*00�
 <at> A� <at> Ae���8C <at> A4����*l���800
 <at> A[c���*68������Ҫ�*`�Ҫ�*� <at> A�]���*8 <at> Ax, <at> A    ì°(r)ªª*  6
     8      <at> A                    þ£ë8
8 <at> A���*���*........8 <at> A���*���*���8���*8 <at> A���*腯��*h��*h��*����
 <at> A8 <at> A`�Ҫ�*p�Ҫ�* �Ҫ�*����*��*������*�����*��*���*���*
X�6 �Ѫ�*��Ѫ�* <at>  <at> 0��*��l��l��*�l��4֪�*� <at> Ap��*SG
��*��#��*��P <at> A;���p��* ːD� <at> 0�l� <at> AP <at> A�N֪�*� <at> AP <at> A <at> ֪�*P�l
 <at> A�a`�8 <at>  <at> A <at>  <at> A�!��r��  <at> AP <at> Aroot <at> eme206-05 12.588636000000 #
(Continue reading)

Jim Kusznir | 1 Oct 23:51 2007
Picon

Re: Writing to DS2406

I got an EE to bring over an OScope, and we may have found out some more info.

First, we have verified that it is sending programming pulses.
Unfortunately, these pulses are only 8.5V for 480microseconds.  We've
viewed the +12 supply on VPP, and verifed it is 12V.  From my
understanding, VPP needs to be 12, and that the votage is supposed to
be passed through from the VPP pin.  Is this correct?  Is there any
setting that can effect this, or does this sound like a dead chip?

Thanks!
--Jim

On 10/1/07, Jim Kusznir <jkusznir <at> gmail.com> wrote:
> I think we're getting close.  It appeared to work from the command
> prompt, but when I read memory, nothing has been changed.  I also
> noticed some owfs paths coming out in the memory readback, so there
> might be a bug there elsewhere, too:
>
> root <at> eme206-05 12.588636000000 # echo -n "A Long Test Into An OWFS
> Device.  Not too long though." > memory
> root <at> eme206-05 12.588636000000 # cat memory
> �������������������������������������������������������������������������������������������������������������������������������y~
> ��* <at> A <at> A��*
> �*8 <at> A  <at> A`�Ҫ�*  <at> A8 <at> A <at> 4` �Ҫ�*训��*  <at> AM����*����h����*36000000/memory
>
> ����*READ path=/uncached/12.588636000000/memory size=4096 offset=0
> 4���8   <at> ���8
>  <at> A4����(���8 <at> ���8����804`����*RELEASE
> path=/uncached/12.588636000000/pages/page.0
>  <at> A��� 
(Continue reading)

Paul Alfille | 2 Oct 00:32 2007
Picon

Re: Writing to DS2406

Good information.

12V x 480 usec

Sounds like a problem with the power supply -- can't keep the voltage high enough with a load.

I take it there is only one device one the line? Resistance? Diode losses?

Paul Alfille

On 10/1/07, Jim Kusznir <jkusznir <at> gmail.com> wrote:
I got an EE to bring over an OScope, and we may have found out some more info.

First, we have verified that it is sending programming pulses.
Unfortunately, these pulses are only 8.5V for 480microseconds.  We've
viewed the +12 supply on VPP, and verifed it is 12V.  From my
understanding, VPP needs to be 12, and that the votage is supposed to
be passed through from the VPP pin.  Is this correct?  Is there any
setting that can effect this, or does this sound like a dead chip?

Thanks!
--Jim

On 10/1/07, Jim Kusznir <jkusznir <at> gmail.com> wrote:
> I think we're getting close.  It appeared to work from the command
> prompt, but when I read memory, nothing has been changed.  I also
> noticed some owfs paths coming out in the memory readback, so there
> might be a bug there elsewhere, too:
>
> root <at> eme206-05 12.588636000000 # echo -n "A Long Test Into An OWFS
> Device.  Not too long though." > memory
> root <at> eme206-05 12.588636000000 # cat memory
> �������������������������������������������������������������������������������������������������������������������������������y~
> ��* <at> A <at> A��*
> �* 8 <at> A <at> A`�Ҫ�* <at> A8 <at> A <at> 4` �Ҫ�*训��* <at> AM����*����h����*36000000/memory
>
> ����*READ path=/uncached/12.588636000000/memory size=4096 offset=0
> 4���8   <at> ���8
> <at> A4����(���8 <at> ���8����804`����*RELEASE
> path=/uncached/12.588636000000/pages/page.0
> <at> A���
> <at> A��ժ�*���� <at> 0�* <at> A� <at> �
>                 <at> A�
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> <at> A <at> A
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> <at> A� <at> Ae���8C <at> A4����*l���800
> <at> A[c���*68������Ҫ�*`�Ҫ�*� <at> A�]���*8 <at> Ax, <at> A    ì°(r)ªª*  6
>      8     <at> A                    þ£ë8
> 8 <at> A���*���*........8 <at> A���*���*���8���*8 <at> A���*腯��*h��*h��*����
> <at> A8 <at> A`�Ҫ�*p�Ҫ�* �Ҫ�*����*��*������*�����*��*���*���*
> X�6 �Ѫ�*��Ѫ�* <at> <at> 0��*��l��l��*�l��4֪�*� <at> Ap��*SG
> ��*��#��*��P <at> A;���p��* ːD� <at> 0�l� <at> AP <at> A�N֪�*� <at> AP <at> A <at> ֪�*P�l
> <at> A�a`�8 <at> <at> A <at> <at> A�!��r�� <at> AP <at> Aroot <at> eme206-05 12.588636000000 #
>
> here's the debug trace:
>
> ---------------- Debug Trace -----------------------
> unique: 103, opcode: LOOKUP (1), nodeid: 4, insize: 47
> LOOKUP /uncached/12.588636000000/memory
>    CALL: FSTAT path=/uncached/12.588636000000/memory
>    CALL: PARSENAME path=[/uncached/12.588636000000/memory]
>   DEBUG: Cache_Get_Device 12 58 86 36 00 00 00 18
>   DEBUG: Get from cache sn 12 58 86 36 00 00 00 18 pointer=(nil) index=-1 size=4
>   DEBUG: value found in cache
>    CALL: ATTRIBUTES path=/uncached/12.588636000000/memory
>   DEBUG: ParsedName_destroy /uncached/12.588636000000/memory
>    NODEID: 5
>    unique: 103, error: 0 (Success), outsize: 136
> unique: 104, opcode: SETATTR (4), nodeid: 5, insize: 128
>    CALL: TRUNCATE path=/uncached/12.588636000000/memory
>    CALL: FSTAT path=/uncached/12.588636000000/memory
>    CALL: PARSENAME path=[/uncached/12.588636000000/memory]
>   DEBUG: Cache_Get_Device 12 58 86 36 00 00 00 18
>   DEBUG: Get from cache sn 12 58 86 36 00 00 00 18 pointer=(nil) index=-1 size=4
>   DEBUG: value found in cache
>    CALL: ATTRIBUTES path=/uncached/12.588636000000/memory
>   DEBUG: ParsedName_destroy /uncached/12.588636000000/memory
>    unique: 104, error: 0 (Success), outsize: 112
> unique: 105, opcode: OPEN (14), nodeid: 5, insize: 48
>    CALL: OPEN path=/uncached/12.588636000000/memory
>    unique: 105, error: 0 (Success), outsize: 32
> OPEN[0] flags: 0x8001 /uncached/12.588636000000/memory
> unique: 106, opcode: WRITE (16), nodeid: 5, insize: 118
> WRITE[0] 54 bytes to 0
>    CALL: WRITE path=/uncached/12.588636000000/memory size=54 offset=0
>   DEBUG: FS_OWQ_create of /uncached/12.588636000000/memory
>    CALL: PARSENAME path=[/uncached/12.588636000000/memory]
>   DEBUG: Cache_Get_Device 12 58 86 36 00 00 00 18
>   DEBUG: Get from cache sn 12 58 86 36 00 00 00 18 pointer=(nil) index=-1 size=4
>   DEBUG: value found in cache
> OWQ OneWireQuery structure of /uncached/12.588636000000/memory
>     OneWireQuery size=54 offset=0, extension=0
> Byte buffer OneWireQuery buffer, length=54
> -- 41 20 4C 6F 6E 67 20 54 65 73 74 20 49 6E 74 6F
> -- 20 41 6E 20 4F 57 46 53 20 44 65 76 69 63 65 2E
> -- 20 20 4E 6F 74 20 74 6F 6F 20 6C 6F 6E 67 20 74
> -- 68 6F 75 67 68 2E
>    <A Long Test Into An OWFS Device.  Not too long though.>
>     OneWireQuery I=54 U=54 F=2.66795E-322 Y=54 D=Wed Dec 31 16:00:54 1969
>
> --- OneWireQuery done
>   DEBUG: Selecting a path (and device)
> path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> path=00 00 00 00 00 00 00 00
>    DATA: DS9490_reset
>    DATA: DS9490_reset: ok
>   DEBUG:   Transaction select = 0
>   DEBUG:   Transaction send = 0
>   DEBUG:   Transaction readin = 0
>   DEBUG:   Transaction CRC16 = 0
>    DATA: DS9490_level 2 (old = 0)
>    DATA: DS9490_level 0 (old = 2)
>    DATA: DS9490_HaltPulse
>    DATA: DS9490_HaltPulse: loop
>    DATA: DS9490_HaltPulse: ok
>   DEBUG:   Transaction program pulse = 0
>   DEBUG:   Transaction end = 0
>   DEBUG: Wrote DS2406 byte 0 -- no errors
>   DEBUG: Selecting a path (and device)
> path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> path=00 00 00 00 00 00 00 00
>    DATA: DS9490_reset
>    DATA: DS9490_reset: ok
>   DEBUG:   Transaction select = 0
>   DEBUG:   Transaction send = 0
>   DEBUG:   Transaction readin = 0
>   DEBUG:   Transaction CRC16 = 0
>    DATA: DS9490_level 2 (old = 0)
>    DATA: DS9490_level 0 (old = 2)
>    DATA: DS9490_HaltPulse
>    DATA: DS9490_HaltPulse: loop
>    DATA: DS9490_HaltPulse: ok
>   DEBUG:   Transaction program pulse = 0
>   DEBUG:   Transaction end = 0
>   DEBUG: Wrote DS2406 byte 1 -- no errors
>   DEBUG: Selecting a path (and device)
> path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> path=00 00 00 00 00 00 00 00
>    DATA: DS9490_reset
>    DATA: DS9490_reset: ok
>   DEBUG:   Transaction select = 0
>   DEBUG:   Transaction send = 0
>   DEBUG:   Transaction readin = 0
>   DEBUG:   Transaction CRC16 = 0
>    DATA: DS9490_level 2 (old = 0)
>    DATA: DS9490_level 0 (old = 2)
>    DATA: DS9490_HaltPulse
>    DATA: DS9490_HaltPulse: loop
>    DATA: DS9490_HaltPulse: ok
>   DEBUG:   Transaction program pulse = 0
>   DEBUG:   Transaction end = 0
>   DEBUG: Wrote DS2406 byte 2 -- no errors
>   DEBUG: Selecting a path (and device)
> path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> path=00 00 00 00 00 00 00 00
>    DATA: DS9490_reset
>    DATA: DS9490_reset: ok
>   DEBUG:   Transaction select = 0
>   DEBUG:   Transaction send = 0
>   DEBUG:   Transaction readin = 0
>   DEBUG:   Transaction CRC16 = 0
>    DATA: DS9490_level 2 (old = 0)
>    DATA: DS9490_level 0 (old = 2)
>    DATA: DS9490_HaltPulse
>    DATA: DS9490_HaltPulse: loop
>    DATA: DS9490_HaltPulse: ok
>   DEBUG:   Transaction program pulse = 0
>   DEBUG:   Transaction end = 0
>   DEBUG: Wrote DS2406 byte 3 -- no errors
>   DEBUG: Selecting a path (and device)
> path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> path=00 00 00 00 00 00 00 00
>    DATA: DS9490_reset
>    DATA: DS9490_reset: ok
>   DEBUG:   Transaction select = 0
>   DEBUG:   Transaction send = 0
>   DEBUG:   Transaction readin = 0
>   DEBUG:   Transaction CRC16 = 0
>    DATA: DS9490_level 2 (old = 0)
>    DATA: DS9490_level 0 (old = 2)
>    DATA: DS9490_HaltPulse
>    DATA: DS9490_HaltPulse: loop
>    DATA: DS9490_HaltPulse: ok
>   DEBUG:   Transaction program pulse = 0
>   DEBUG:   Transaction end = 0
>   DEBUG: Wrote DS2406 byte 4 -- no errors
>   DEBUG: Selecting a path (and device)
> path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> path=00 00 00 00 00 00 00 00
>    DATA: DS9490_reset
>    DATA: DS9490_reset: ok
>   DEBUG:   Transaction select = 0
>   DEBUG:   Transaction send = 0
>   DEBUG:   Transaction readin = 0
>   DEBUG:   Transaction CRC16 = 0
>    DATA: DS9490_level 2 (old = 0)
>    DATA: DS9490_level 0 (old = 2)
>    DATA: DS9490_HaltPulse
>    DATA: DS9490_HaltPulse: loop
>    DATA: DS9490_HaltPulse: ok
>   DEBUG:   Transaction program pulse = 0
>   DEBUG:   Transaction end = 0
>   DEBUG: Wrote DS2406 byte 5 -- no errors
>   DEBUG: Selecting a path (and device)
> path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> path=00 00 00 00 00 00 00 00
>    DATA: DS9490_reset
>    DATA: DS9490_reset: ok
>   DEBUG:   Transaction select = 0
>   DEBUG:   Transaction send = 0
>   DEBUG:   Transaction readin = 0
>   DEBUG:   Transaction CRC16 = 0
>    DATA: DS9490_level 2 (old = 0)
>    DATA: DS9490_level 0 (old = 2)
>    DATA: DS9490_HaltPulse
>    DATA: DS9490_HaltPulse: loop
>    DATA: DS9490_HaltPulse: ok
>   DEBUG:   Transaction program pulse = 0
>   DEBUG:   Transaction end = 0
>   DEBUG: Wrote DS2406 byte 6 -- no errors
>   DEBUG: Selecting a path (and device)
> path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> path=00 00 00 00 00 00 00 00
>    DATA: DS9490_reset
>    DATA: DS9490_reset: ok
>   DEBUG:   Transaction select = 0
>   DEBUG:   Transaction send = 0
>   DEBUG:   Transaction readin = 0
>   DEBUG:   Transaction CRC16 = 0
>    DATA: DS9490_level 2 (old = 0)
>    DATA: DS9490_level 0 (old = 2)
>    DATA: DS9490_HaltPulse
>    DATA: DS9490_HaltPulse: loop
>    DATA: DS9490_HaltPulse: ok
>   DEBUG:   Transaction program pulse = 0
>   DEBUG:   Transaction end = 0
>   DEBUG: Wrote DS2406 byte 7 -- no errors
>   DEBUG: Selecting a path (and device)
><<snip>>
>
>
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njh | 2 Oct 00:51 2007

Re: Writing to DS2406

This is an obvious thing, but have you tried putting a capacitor right on 
the power supply leads to the chip?  0.1uF bypassing cap should do the 
trick I think?

njh

On Mon, 1 Oct 2007, Jim Kusznir wrote:

> I got an EE to bring over an OScope, and we may have found out some more info.

First, we have verified that it is sending programming pulses.
Unfortunately, these pulses are only 8.5V for 480microseconds.  We've
viewed the +12 supply on VPP, and verifed it is 12V.  From my
understanding, VPP needs to be 12, and that the votage is supposed to
be passed through from the VPP pin.  Is this correct?  Is there any
setting that can effect this, or does this sound like a dead chip?

Thanks!
--Jim

On 10/1/07, Jim Kusznir <jkusznir <at> gmail.com> wrote:
> I think we're getting close.  It appeared to work from the command
> prompt, but when I read memory, nothing has been changed.  I also
> noticed some owfs paths coming out in the memory readback, so there
> might be a bug there elsewhere, too:
>
> root <at> eme206-05 12.588636000000 # echo -n "A Long Test Into An OWFS
> Device.  Not too long though." > memory
> root <at> eme206-05 12.588636000000 # cat memory
> ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿy~
> ÿÿÿÿ* <at> A <at> Aÿÿÿÿ*
> ÿÿ*8 <at> A  <at> A`ÿÿÿÿÿÿ*  <at> A8 <at> A <at> 4` ÿÿÿÿÿÿ*ÿÿÿÿÿÿ*  <at> AMÿÿÿÿÿÿÿÿ*ÿÿÿÿÿÿÿÿhÿÿÿÿÿÿÿÿ*36000000/memory
>
> ÿÿÿÿÿÿÿÿ*READ path=/uncached/12.588636000000/memory size=4096 offset=0
> 4ÿÿÿÿÿÿ8   <at> ÿÿÿÿÿÿ8
>  <at> A4ÿÿÿÿÿÿÿÿ(ÿÿÿÿÿÿ8 <at> ÿÿÿÿÿÿ8ÿÿÿÿÿÿÿÿ804`ÿÿÿÿÿÿÿÿ*RELEASE
> path=/uncached/12.588636000000/pages/page.0
>  <at> Aÿÿÿÿÿÿ 
>  <at> Aÿÿÿÿÿÿÿÿ*ÿÿÿÿÿÿÿÿ <at> 0ÿÿ* <at> Aÿÿ <at> ÿÿ
>                 <at> Aÿÿ
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>  <at> A  <at> A
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>
 <at> A[cÿÿÿÿÿÿ*68ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ*`ÿÿÿÿÿÿ*ÿÿ <at> Aÿÿ]ÿÿÿÿÿÿ*8 <at> Ax, <at> A
   ì°(r)ªª*  6
>      8      <at> A                    þ£ë8
> 8 <at> Aÿÿÿÿÿÿ*ÿÿÿÿÿÿ*........8 <at> Aÿÿÿÿÿÿ*ÿÿÿÿÿÿ*ÿÿÿÿÿÿ8ÿÿÿÿÿÿ*8 <at> Aÿÿÿÿÿÿ*ÿÿÿÿÿÿ*hÿÿÿÿ*hÿÿÿÿ*ÿÿÿÿÿÿÿÿ
>  <at> A8 <at> A`ÿÿÿÿÿÿ*pÿÿÿÿÿÿ* ÿÿÿÿÿÿ*ÿÿÿÿÿÿÿÿ*ÿÿÿÿ*ÿÿÿÿÿÿÿÿÿÿÿÿ*ÿÿÿÿÿÿÿÿÿÿ*ÿÿÿÿ*ÿÿÿÿÿÿ*ÿÿÿÿÿÿ*
> Xÿÿ6 ÿÿÿÿÿÿ*ÿÿÿÿÿÿÿÿ* <at>  <at> 0ÿÿÿÿ*ÿÿÿÿlÿÿÿÿlÿÿÿÿ*ÿÿlÿÿÿÿ4ÿÿÿÿ*ÿÿ <at> Apÿÿÿÿ*SG
> ÿÿÿÿ*ÿÿÿÿ#ÿÿÿÿ*ÿÿÿÿP <at> A;ÿÿÿÿÿÿpÿÿÿÿ* ÿÿDÿÿ <at> 0ÿÿlÿÿ <at> AP <at> AÿÿNÿÿÿÿ*ÿÿ <at> AP <at> A <at> ÿÿÿÿ*Pÿÿl
>  <at> Aÿÿa`ÿÿ8 <at>  <at> A <at>  <at> Aÿÿ!ÿÿÿÿrÿÿÿÿ  <at> AP <at> Aroot <at> eme206-05 12.588636000000 #
>
> here's the debug trace:
>
> ---------------- Debug Trace -----------------------
> unique: 103, opcode: LOOKUP (1), nodeid: 4, insize: 47
> LOOKUP /uncached/12.588636000000/memory
>    CALL: FSTAT path=/uncached/12.588636000000/memory
>    CALL: PARSENAME path=[/uncached/12.588636000000/memory]
>   DEBUG: Cache_Get_Device 12 58 86 36 00 00 00 18
>   DEBUG: Get from cache sn 12 58 86 36 00 00 00 18 pointer=(nil) index=-1 size=4
>   DEBUG: value found in cache
>    CALL: ATTRIBUTES path=/uncached/12.588636000000/memory
>   DEBUG: ParsedName_destroy /uncached/12.588636000000/memory
>    NODEID: 5
>    unique: 103, error: 0 (Success), outsize: 136
> unique: 104, opcode: SETATTR (4), nodeid: 5, insize: 128
>    CALL: TRUNCATE path=/uncached/12.588636000000/memory
>    CALL: FSTAT path=/uncached/12.588636000000/memory
>    CALL: PARSENAME path=[/uncached/12.588636000000/memory]
>   DEBUG: Cache_Get_Device 12 58 86 36 00 00 00 18
>   DEBUG: Get from cache sn 12 58 86 36 00 00 00 18 pointer=(nil) index=-1 size=4
>   DEBUG: value found in cache
>    CALL: ATTRIBUTES path=/uncached/12.588636000000/memory
>   DEBUG: ParsedName_destroy /uncached/12.588636000000/memory
>    unique: 104, error: 0 (Success), outsize: 112
> unique: 105, opcode: OPEN (14), nodeid: 5, insize: 48
>    CALL: OPEN path=/uncached/12.588636000000/memory
>    unique: 105, error: 0 (Success), outsize: 32
> OPEN[0] flags: 0x8001 /uncached/12.588636000000/memory
> unique: 106, opcode: WRITE (16), nodeid: 5, insize: 118
> WRITE[0] 54 bytes to 0
>    CALL: WRITE path=/uncached/12.588636000000/memory size=54 offset=0
>   DEBUG: FS_OWQ_create of /uncached/12.588636000000/memory
>    CALL: PARSENAME path=[/uncached/12.588636000000/memory]
>   DEBUG: Cache_Get_Device 12 58 86 36 00 00 00 18
>   DEBUG: Get from cache sn 12 58 86 36 00 00 00 18 pointer=(nil) index=-1 size=4
>   DEBUG: value found in cache
> OWQ OneWireQuery structure of /uncached/12.588636000000/memory
>     OneWireQuery size=54 offset=0, extension=0
> Byte buffer OneWireQuery buffer, length=54
> -- 41 20 4C 6F 6E 67 20 54 65 73 74 20 49 6E 74 6F
> -- 20 41 6E 20 4F 57 46 53 20 44 65 76 69 63 65 2E
> -- 20 20 4E 6F 74 20 74 6F 6F 20 6C 6F 6E 67 20 74
> -- 68 6F 75 67 68 2E
>    <A Long Test Into An OWFS Device.  Not too long though.>
>     OneWireQuery I=54 U=54 F=2.66795E-322 Y=54 D=Wed Dec 31 16:00:54 1969
>
> --- OneWireQuery done
>   DEBUG: Selecting a path (and device)
> path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> path=00 00 00 00 00 00 00 00
>    DATA: DS9490_reset
>    DATA: DS9490_reset: ok
>   DEBUG:   Transaction select = 0
>   DEBUG:   Transaction send = 0
>   DEBUG:   Transaction readin = 0
>   DEBUG:   Transaction CRC16 = 0
>    DATA: DS9490_level 2 (old = 0)
>    DATA: DS9490_level 0 (old = 2)
>    DATA: DS9490_HaltPulse
>    DATA: DS9490_HaltPulse: loop
>    DATA: DS9490_HaltPulse: ok
>   DEBUG:   Transaction program pulse = 0
>   DEBUG:   Transaction end = 0
>   DEBUG: Wrote DS2406 byte 0 -- no errors
>   DEBUG: Selecting a path (and device)
> path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> path=00 00 00 00 00 00 00 00
>    DATA: DS9490_reset
>    DATA: DS9490_reset: ok
>   DEBUG:   Transaction select = 0
>   DEBUG:   Transaction send = 0
>   DEBUG:   Transaction readin = 0
>   DEBUG:   Transaction CRC16 = 0
>    DATA: DS9490_level 2 (old = 0)
>    DATA: DS9490_level 0 (old = 2)
>    DATA: DS9490_HaltPulse
>    DATA: DS9490_HaltPulse: loop
>    DATA: DS9490_HaltPulse: ok
>   DEBUG:   Transaction program pulse = 0
>   DEBUG:   Transaction end = 0
>   DEBUG: Wrote DS2406 byte 1 -- no errors
>   DEBUG: Selecting a path (and device)
> path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> path=00 00 00 00 00 00 00 00
>    DATA: DS9490_reset
>    DATA: DS9490_reset: ok
>   DEBUG:   Transaction select = 0
>   DEBUG:   Transaction send = 0
>   DEBUG:   Transaction readin = 0
>   DEBUG:   Transaction CRC16 = 0
>    DATA: DS9490_level 2 (old = 0)
>    DATA: DS9490_level 0 (old = 2)
>    DATA: DS9490_HaltPulse
>    DATA: DS9490_HaltPulse: loop
>    DATA: DS9490_HaltPulse: ok
>   DEBUG:   Transaction program pulse = 0
>   DEBUG:   Transaction end = 0
>   DEBUG: Wrote DS2406 byte 2 -- no errors
>   DEBUG: Selecting a path (and device)
> path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> path=00 00 00 00 00 00 00 00
>    DATA: DS9490_reset
>    DATA: DS9490_reset: ok
>   DEBUG:   Transaction select = 0
>   DEBUG:   Transaction send = 0
>   DEBUG:   Transaction readin = 0
>   DEBUG:   Transaction CRC16 = 0
>    DATA: DS9490_level 2 (old = 0)
>    DATA: DS9490_level 0 (old = 2)
>    DATA: DS9490_HaltPulse
>    DATA: DS9490_HaltPulse: loop
>    DATA: DS9490_HaltPulse: ok
>   DEBUG:   Transaction program pulse = 0
>   DEBUG:   Transaction end = 0
>   DEBUG: Wrote DS2406 byte 3 -- no errors
>   DEBUG: Selecting a path (and device)
> path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> path=00 00 00 00 00 00 00 00
>    DATA: DS9490_reset
>    DATA: DS9490_reset: ok
>   DEBUG:   Transaction select = 0
>   DEBUG:   Transaction send = 0
>   DEBUG:   Transaction readin = 0
>   DEBUG:   Transaction CRC16 = 0
>    DATA: DS9490_level 2 (old = 0)
>    DATA: DS9490_level 0 (old = 2)
>    DATA: DS9490_HaltPulse
>    DATA: DS9490_HaltPulse: loop
>    DATA: DS9490_HaltPulse: ok
>   DEBUG:   Transaction program pulse = 0
>   DEBUG:   Transaction end = 0
>   DEBUG: Wrote DS2406 byte 4 -- no errors
>   DEBUG: Selecting a path (and device)
> path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> path=00 00 00 00 00 00 00 00
>    DATA: DS9490_reset
>    DATA: DS9490_reset: ok
>   DEBUG:   Transaction select = 0
>   DEBUG:   Transaction send = 0
>   DEBUG:   Transaction readin = 0
>   DEBUG:   Transaction CRC16 = 0
>    DATA: DS9490_level 2 (old = 0)
>    DATA: DS9490_level 0 (old = 2)
>    DATA: DS9490_HaltPulse
>    DATA: DS9490_HaltPulse: loop
>    DATA: DS9490_HaltPulse: ok
>   DEBUG:   Transaction program pulse = 0
>   DEBUG:   Transaction end = 0
>   DEBUG: Wrote DS2406 byte 5 -- no errors
>   DEBUG: Selecting a path (and device)
> path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> path=00 00 00 00 00 00 00 00
>    DATA: DS9490_reset
>    DATA: DS9490_reset: ok
>   DEBUG:   Transaction select = 0
>   DEBUG:   Transaction send = 0
>   DEBUG:   Transaction readin = 0
>   DEBUG:   Transaction CRC16 = 0
>    DATA: DS9490_level 2 (old = 0)
>    DATA: DS9490_level 0 (old = 2)
>    DATA: DS9490_HaltPulse
>    DATA: DS9490_HaltPulse: loop
>    DATA: DS9490_HaltPulse: ok
>   DEBUG:   Transaction program pulse = 0
>   DEBUG:   Transaction end = 0
>   DEBUG: Wrote DS2406 byte 6 -- no errors
>   DEBUG: Selecting a path (and device)
> path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> path=00 00 00 00 00 00 00 00
>    DATA: DS9490_reset
>    DATA: DS9490_reset: ok
>   DEBUG:   Transaction select = 0
>   DEBUG:   Transaction send = 0
>   DEBUG:   Transaction readin = 0
>   DEBUG:   Transaction CRC16 = 0
>    DATA: DS9490_level 2 (old = 0)
>    DATA: DS9490_level 0 (old = 2)
>    DATA: DS9490_HaltPulse
>    DATA: DS9490_HaltPulse: loop
>    DATA: DS9490_HaltPulse: ok
>   DEBUG:   Transaction program pulse = 0
>   DEBUG:   Transaction end = 0
>   DEBUG: Wrote DS2406 byte 7 -- no errors
>   DEBUG: Selecting a path (and device)
><<snip>>
>
>
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Jim Kusznir | 2 Oct 01:02 2007
Picon

Re: Writing to DS2406

Thanks for the help!

We actually found that the DS9490R includes a zener diode (in package
DS9503P) that limited the output.  We removed and properly bypassed
it, and now get programming pulses to 10.5V, which appears sufficient
to burn the prom.  We are sucessfully burning the eprom in the 2506's!

(Our power supply was a PC power supply, and we watched it on the
OScope, and verified that it was not moving at all.  The voltage
limitation was internal to the module.

Thanks for all the help!!

--Jim

On 10/1/07, njh <njh <at> njhurst.com> wrote:
> This is an obvious thing, but have you tried putting a capacitor right on
> the power supply leads to the chip?  0.1uF bypassing cap should do the
> trick I think?
>
> njh
>
> On Mon, 1 Oct 2007, Jim Kusznir wrote:
>
> > I got an EE to bring over an OScope, and we may have found out some more info.
>
> First, we have verified that it is sending programming pulses.
> Unfortunately, these pulses are only 8.5V for 480microseconds.  We've
> viewed the +12 supply on VPP, and verifed it is 12V.  From my
> understanding, VPP needs to be 12, and that the votage is supposed to
> be passed through from the VPP pin.  Is this correct?  Is there any
> setting that can effect this, or does this sound like a dead chip?
>
> Thanks!
> --Jim
>
> On 10/1/07, Jim Kusznir <jkusznir <at> gmail.com> wrote:
> > I think we're getting close.  It appeared to work from the command
> > prompt, but when I read memory, nothing has been changed.  I also
> > noticed some owfs paths coming out in the memory readback, so there
> > might be a bug there elsewhere, too:
> >
> > root <at> eme206-05 12.588636000000 # echo -n "A Long Test Into An OWFS
> > Device.  Not too long though." > memory
> > root <at> eme206-05 12.588636000000 # cat memory
> > ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿy~
> > ÿÿÿÿ* <at> A   <at> Aÿÿ ÿÿ*
> > ÿÿ*8 <at> A  <at> A`ÿÿÿÿÿÿ*  <at> A8 <at> A <at> 4` ÿÿÿÿÿÿ*ÿÿÿÿÿÿ*  <at> AMÿÿÿÿÿÿÿÿ*ÿÿÿÿÿÿÿÿhÿÿÿÿÿÿÿÿ*36000000/memory
> >
> > ÿÿ ÿÿÿÿÿÿ*READ path=/uncached/12.588636000000/memory size=4096 offset=0
> > 4 ÿÿÿÿÿÿ8   <at> ÿÿÿÿÿÿ8
> >  <at> A4ÿÿÿÿÿÿÿÿ (ÿÿÿÿÿÿ8 <at> ÿÿÿÿÿÿ8ÿÿÿÿÿÿÿÿ804`ÿÿ ÿÿÿÿÿÿ*RELEASE
> > path=/uncached/12.588636000000/pages/page.0
> >  <at> Aÿÿÿÿÿÿ
> >  <at> Aÿÿÿÿÿÿÿÿ*ÿÿÿÿÿÿÿÿ <at>  0ÿÿ* <at> Aÿÿ <at> ÿÿ
> >                 <at> Aÿÿ
> >  <at> A                 <at> A 0
> >  <at> A  <at> A
> >  <at> Ap <at> A <at> ÿÿ ÿÿÿÿ*`ÿÿÿÿÿÿ*4ÿÿÿÿÿÿÿÿ* <at>   <at> A4ÿÿÿÿÿÿÿÿ*00ÿÿ
> >  <at> Aÿÿ <at> Aeÿÿÿÿÿÿ8C <at> A4ÿÿÿÿÿÿÿÿ*lÿÿÿÿÿÿ800
> >  <at> A[cÿÿÿÿÿÿ*68 ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ*`ÿÿÿÿÿÿ*ÿÿ
 <at> Aÿÿ]ÿÿÿÿÿÿ*8 <at> Ax, <at> A    ì°(r)ªª*  6
> >      8      <at> A                    þ £ë8
> > 8 <at> Aÿÿ ÿÿÿÿ*ÿÿ ÿÿÿÿ*........ 8 <at> Aÿÿ ÿÿÿÿ*ÿÿ ÿÿÿÿ*ÿÿ ÿÿÿÿ8ÿÿ
ÿÿÿÿ*8 <at> Aÿÿ ÿÿÿÿ* ÿÿÿÿÿÿ*hÿÿÿÿ*hÿÿÿÿ*ÿÿÿÿÿÿÿÿ
> >  <at> A8 <at> A`ÿÿÿÿÿÿ*pÿÿÿÿÿÿ* ÿÿÿÿÿÿ* ÿÿÿÿÿÿÿÿ* ÿÿÿÿ*ÿÿÿÿÿÿÿÿ
ÿÿÿÿ* ÿÿÿÿÿÿÿÿÿÿ*ÿÿÿÿ* ÿÿ ÿÿÿÿ*ÿÿ ÿÿÿÿ*
> >  Xÿÿ6  ÿÿÿÿÿÿ*ÿÿÿÿÿÿÿÿ* <at>  <at>   0 ÿÿÿÿ* ÿÿÿÿlÿÿÿÿl
ÿÿÿÿ*ÿÿlÿÿÿÿ4ÿÿÿÿ*ÿÿ  <at> Ap ÿÿÿÿ* S G
> > ÿÿÿÿ* ÿÿÿÿ#ÿÿÿÿ*ÿÿÿÿ P  <at> A ;ÿÿÿÿÿÿp ÿÿÿÿ* ÿÿDÿÿ  <at> 0ÿÿlÿÿ  <at> AP
 <at> AÿÿNÿÿÿÿ*ÿÿ  <at> AP  <at> A <at> ÿÿÿÿ*Pÿÿl
> >  <at> Aÿÿa`ÿÿ8 <at>   <at> A <at>   <at> Aÿÿ! ÿÿÿÿrÿÿÿÿ  <at> AP  <at> Aroot <at> eme206-05 12.588636000000 #
> >
> > here's the debug trace:
> >
> > ---------------- Debug Trace -----------------------
> > unique: 103, opcode: LOOKUP (1), nodeid: 4, insize: 47
> > LOOKUP /uncached/12.588636000000/memory
> >    CALL: FSTAT path=/uncached/12.588636000000/memory
> >    CALL: PARSENAME path=[/uncached/12.588636000000/memory]
> >   DEBUG: Cache_Get_Device 12 58 86 36 00 00 00 18
> >   DEBUG: Get from cache sn 12 58 86 36 00 00 00 18 pointer=(nil) index=-1 size=4
> >   DEBUG: value found in cache
> >    CALL: ATTRIBUTES path=/uncached/12.588636000000/memory
> >   DEBUG: ParsedName_destroy /uncached/12.588636000000/memory
> >    NODEID: 5
> >    unique: 103, error: 0 (Success), outsize: 136
> > unique: 104, opcode: SETATTR (4), nodeid: 5, insize: 128
> >    CALL: TRUNCATE path=/uncached/12.588636000000/memory
> >    CALL: FSTAT path=/uncached/12.588636000000/memory
> >    CALL: PARSENAME path=[/uncached/12.588636000000/memory]
> >   DEBUG: Cache_Get_Device 12 58 86 36 00 00 00 18
> >   DEBUG: Get from cache sn 12 58 86 36 00 00 00 18 pointer=(nil) index=-1 size=4
> >   DEBUG: value found in cache
> >    CALL: ATTRIBUTES path=/uncached/12.588636000000/memory
> >   DEBUG: ParsedName_destroy /uncached/12.588636000000/memory
> >    unique: 104, error: 0 (Success), outsize: 112
> > unique: 105, opcode: OPEN (14), nodeid: 5, insize: 48
> >    CALL: OPEN path=/uncached/12.588636000000/memory
> >    unique: 105, error: 0 (Success), outsize: 32
> > OPEN[0] flags: 0x8001 /uncached/12.588636000000/memory
> > unique: 106, opcode: WRITE (16), nodeid: 5, insize: 118
> > WRITE[0] 54 bytes to 0
> >    CALL: WRITE path=/uncached/12.588636000000/memory size=54 offset=0
> >   DEBUG: FS_OWQ_create of /uncached/12.588636000000/memory
> >    CALL: PARSENAME path=[/uncached/12.588636000000/memory]
> >   DEBUG: Cache_Get_Device 12 58 86 36 00 00 00 18
> >   DEBUG: Get from cache sn 12 58 86 36 00 00 00 18 pointer=(nil) index=-1 size=4
> >   DEBUG: value found in cache
> > OWQ OneWireQuery structure of /uncached/12.588636000000/memory
> >     OneWireQuery size=54 offset=0, extension=0
> > Byte buffer OneWireQuery buffer, length=54
> > -- 41 20 4C 6F 6E 67 20 54 65 73 74 20 49 6E 74 6F
> > -- 20 41 6E 20 4F 57 46 53 20 44 65 76 69 63 65 2E
> > -- 20 20 4E 6F 74 20 74 6F 6F 20 6C 6F 6E 67 20 74
> > -- 68 6F 75 67 68 2E
> >    <A Long Test Into An OWFS Device.  Not too long though.>
> >     OneWireQuery I=54 U=54 F=2.66795E-322 Y=54 D=Wed Dec 31 16:00:54 1969
> >
> > --- OneWireQuery done
> >   DEBUG: Selecting a path (and device)
> > path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> > path=00 00 00 00 00 00 00 00
> >    DATA: DS9490_reset
> >    DATA: DS9490_reset: ok
> >   DEBUG:   Transaction select = 0
> >   DEBUG:   Transaction send = 0
> >   DEBUG:   Transaction readin = 0
> >   DEBUG:   Transaction CRC16 = 0
> >    DATA: DS9490_level 2 (old = 0)
> >    DATA: DS9490_level 0 (old = 2)
> >    DATA: DS9490_HaltPulse
> >    DATA: DS9490_HaltPulse: loop
> >    DATA: DS9490_HaltPulse: ok
> >   DEBUG:   Transaction program pulse = 0
> >   DEBUG:   Transaction end = 0
> >   DEBUG: Wrote DS2406 byte 0 -- no errors
> >   DEBUG: Selecting a path (and device)
> > path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> > path=00 00 00 00 00 00 00 00
> >    DATA: DS9490_reset
> >    DATA: DS9490_reset: ok
> >   DEBUG:   Transaction select = 0
> >   DEBUG:   Transaction send = 0
> >   DEBUG:   Transaction readin = 0
> >   DEBUG:   Transaction CRC16 = 0
> >    DATA: DS9490_level 2 (old = 0)
> >    DATA: DS9490_level 0 (old = 2)
> >    DATA: DS9490_HaltPulse
> >    DATA: DS9490_HaltPulse: loop
> >    DATA: DS9490_HaltPulse: ok
> >   DEBUG:   Transaction program pulse = 0
> >   DEBUG:   Transaction end = 0
> >   DEBUG: Wrote DS2406 byte 1 -- no errors
> >   DEBUG: Selecting a path (and device)
> > path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> > path=00 00 00 00 00 00 00 00
> >    DATA: DS9490_reset
> >    DATA: DS9490_reset: ok
> >   DEBUG:   Transaction select = 0
> >   DEBUG:   Transaction send = 0
> >   DEBUG:   Transaction readin = 0
> >   DEBUG:   Transaction CRC16 = 0
> >    DATA: DS9490_level 2 (old = 0)
> >    DATA: DS9490_level 0 (old = 2)
> >    DATA: DS9490_HaltPulse
> >    DATA: DS9490_HaltPulse: loop
> >    DATA: DS9490_HaltPulse: ok
> >   DEBUG:   Transaction program pulse = 0
> >   DEBUG:   Transaction end = 0
> >   DEBUG: Wrote DS2406 byte 2 -- no errors
> >   DEBUG: Selecting a path (and device)
> > path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> > path=00 00 00 00 00 00 00 00
> >    DATA: DS9490_reset
> >    DATA: DS9490_reset: ok
> >   DEBUG:   Transaction select = 0
> >   DEBUG:   Transaction send = 0
> >   DEBUG:   Transaction readin = 0
> >   DEBUG:   Transaction CRC16 = 0
> >    DATA: DS9490_level 2 (old = 0)
> >    DATA: DS9490_level 0 (old = 2)
> >    DATA: DS9490_HaltPulse
> >    DATA: DS9490_HaltPulse: loop
> >    DATA: DS9490_HaltPulse: ok
> >   DEBUG:   Transaction program pulse = 0
> >   DEBUG:   Transaction end = 0
> >   DEBUG: Wrote DS2406 byte 3 -- no errors
> >   DEBUG: Selecting a path (and device)
> > path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> > path=00 00 00 00 00 00 00 00
> >    DATA: DS9490_reset
> >    DATA: DS9490_reset: ok
> >   DEBUG:   Transaction select = 0
> >   DEBUG:   Transaction send = 0
> >   DEBUG:   Transaction readin = 0
> >   DEBUG:   Transaction CRC16 = 0
> >    DATA: DS9490_level 2 (old = 0)
> >    DATA: DS9490_level 0 (old = 2)
> >    DATA: DS9490_HaltPulse
> >    DATA: DS9490_HaltPulse: loop
> >    DATA: DS9490_HaltPulse: ok
> >   DEBUG:   Transaction program pulse = 0
> >   DEBUG:   Transaction end = 0
> >   DEBUG: Wrote DS2406 byte 4 -- no errors
> >   DEBUG: Selecting a path (and device)
> > path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> > path=00 00 00 00 00 00 00 00
> >    DATA: DS9490_reset
> >    DATA: DS9490_reset: ok
> >   DEBUG:   Transaction select = 0
> >   DEBUG:   Transaction send = 0
> >   DEBUG:   Transaction readin = 0
> >   DEBUG:   Transaction CRC16 = 0
> >    DATA: DS9490_level 2 (old = 0)
> >    DATA: DS9490_level 0 (old = 2)
> >    DATA: DS9490_HaltPulse
> >    DATA: DS9490_HaltPulse: loop
> >    DATA: DS9490_HaltPulse: ok
> >   DEBUG:   Transaction program pulse = 0
> >   DEBUG:   Transaction end = 0
> >   DEBUG: Wrote DS2406 byte 5 -- no errors
> >   DEBUG: Selecting a path (and device)
> > path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> > path=00 00 00 00 00 00 00 00
> >    DATA: DS9490_reset
> >    DATA: DS9490_reset: ok
> >   DEBUG:   Transaction select = 0
> >   DEBUG:   Transaction send = 0
> >   DEBUG:   Transaction readin = 0
> >   DEBUG:   Transaction CRC16 = 0
> >    DATA: DS9490_level 2 (old = 0)
> >    DATA: DS9490_level 0 (old = 2)
> >    DATA: DS9490_HaltPulse
> >    DATA: DS9490_HaltPulse: loop
> >    DATA: DS9490_HaltPulse: ok
> >   DEBUG:   Transaction program pulse = 0
> >   DEBUG:   Transaction end = 0
> >   DEBUG: Wrote DS2406 byte 6 -- no errors
> >   DEBUG: Selecting a path (and device)
> > path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> > path=00 00 00 00 00 00 00 00
> >    DATA: DS9490_reset
> >    DATA: DS9490_reset: ok
> >   DEBUG:   Transaction select = 0
> >   DEBUG:   Transaction send = 0
> >   DEBUG:   Transaction readin = 0
> >   DEBUG:   Transaction CRC16 = 0
> >    DATA: DS9490_level 2 (old = 0)
> >    DATA: DS9490_level 0 (old = 2)
> >    DATA: DS9490_HaltPulse
> >    DATA: DS9490_HaltPulse: loop
> >    DATA: DS9490_HaltPulse: ok
> >   DEBUG:   Transaction program pulse = 0
> >   DEBUG:   Transaction end = 0
> >   DEBUG: Wrote DS2406 byte 7 -- no errors
> >   DEBUG: Selecting a path (and device)
> ><<snip>>
> >
> >
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Gregg C Levine | 2 Oct 01:31 2007
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Re: Writing to DS2406

Hello!
I believe I am missing something here. Jim you, and your staff (I presume
you have one because of the EE and his scope.) did all of that with a
DS9490R and successful.

What about using the passive version of the DS9097? (And of course I do not
recall the full number for this gizmo, just the specific name for it.) Of
course this presupposes that you do have a legacy serial port available, and
that one of the DS9097s for such a function is indeed available.

I can see where installing specific information into a DS2406 or the Unique
Ware devices for a specific project. And then including routines in your
code to read them back and including functions for accessing them via both
forms are also needful and necessary. 

But then again this is just me.
--
Gregg C Levine hansolofalcon <at> worldnet.att.net
"The Force will be with you. Always." Obi-Wan Kenobi
  

> -----Original Message-----
> From: owfs-developers-bounces <at> lists.sourceforge.net
[mailto:owfs-developers-
> bounces <at> lists.sourceforge.net] On Behalf Of Jim Kusznir
> Sent: Monday, October 01, 2007 7:03 PM
> To: owfs-developers <at> lists.sourceforge.net
> Subject: Re: [Owfs-developers] Writing to DS2406
> 
> Thanks for the help!
> 
> We actually found that the DS9490R includes a zener diode (in package
> DS9503P) that limited the output.  We removed and properly bypassed
> it, and now get programming pulses to 10.5V, which appears sufficient
> to burn the prom.  We are sucessfully burning the eprom in the 2506's!
> 
> (Our power supply was a PC power supply, and we watched it on the
> OScope, and verified that it was not moving at all.  The voltage
> limitation was internal to the module.
> 
> Thanks for all the help!!
> 
> --Jim
> 
> On 10/1/07, njh <njh <at> njhurst.com> wrote:
> > This is an obvious thing, but have you tried putting a capacitor right
on
> > the power supply leads to the chip?  0.1uF bypassing cap should do the
> > trick I think?
> >
> > njh
> >
> > On Mon, 1 Oct 2007, Jim Kusznir wrote:
> >
> > > I got an EE to bring over an OScope, and we may have found out some
more info.
> >
> > First, we have verified that it is sending programming pulses.
> > Unfortunately, these pulses are only 8.5V for 480microseconds.  We've
> > viewed the +12 supply on VPP, and verifed it is 12V.  From my
> > understanding, VPP needs to be 12, and that the votage is supposed to
> > be passed through from the VPP pin.  Is this correct?  Is there any
> > setting that can effect this, or does this sound like a dead chip?
> >
> > Thanks!
> > --Jim
> >
> > On 10/1/07, Jim Kusznir <jkusznir <at> gmail.com> wrote:
> > > I think we're getting close.  It appeared to work from the command
> > > prompt, but when I read memory, nothing has been changed.  I also
> > > noticed some owfs paths coming out in the memory readback, so there
> > > might be a bug there elsewhere, too:
> > >
> > > root <at> eme206-05 12.588636000000 # echo -n "A Long Test Into An OWFS
> > > Device.  Not too long though." > memory
> > > root <at> eme206-05 12.588636000000 # cat memory
> > >
> ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
> ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
> ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
> ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿy~
> > > ÿÿÿÿ* <at> A   <at> Aÿÿ ÿÿ*
> > > ÿÿ*8 <at> A  <at> A`ÿÿÿÿÿÿ*  <at> A8 <at> A <at> 4` ÿÿÿÿÿÿ*ÿÿÿÿÿÿ*
>  <at> AMÿÿÿÿÿÿÿÿ*ÿÿÿÿÿÿÿÿhÿÿÿÿÿÿÿÿ*36000000/memory
> > >
> > > ÿÿ ÿÿÿÿÿÿ*READ path=/uncached/12.588636000000/memory size=4096
offset=0
> > > 4 ÿÿÿÿÿÿ8   <at> ÿÿÿÿÿÿ8
> > >  <at> A4ÿÿÿÿÿÿÿÿ (ÿÿÿÿÿÿ8 <at> ÿÿÿÿÿÿ8ÿÿÿÿÿÿÿÿ804`ÿÿ ÿÿÿÿÿÿ*RELEASE
> > > path=/uncached/12.588636000000/pages/page.0
> > >  <at> Aÿÿÿÿÿÿ
> > >  <at> Aÿÿÿÿÿÿÿÿ*ÿÿÿÿÿÿÿÿ <at>  0ÿÿ* <at> Aÿÿ <at> ÿÿ
> > >                 <at> Aÿÿ
> > >  <at> A                 <at> A 0
> > >  <at> A  <at> A
> > >  <at> Ap <at> A <at> ÿÿ ÿÿÿÿ*`ÿÿÿÿÿÿ*4ÿÿÿÿÿÿÿÿ* <at>   <at> A4ÿÿÿÿÿÿÿÿ*00ÿÿ
> > >  <at> Aÿÿ <at> Aeÿÿÿÿÿÿ8C <at> A4ÿÿÿÿÿÿÿÿ*lÿÿÿÿÿÿ800
> > >  <at> A[cÿÿÿÿÿÿ*68 ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ*`ÿÿÿÿÿÿ*ÿÿ  <at> Aÿÿ]ÿÿÿÿÿÿ*8 <at> Ax, <at> A
> ì°(r)ªª*  6
> > >      8      <at> A                    þ £ë8
> > > 8 <at> Aÿÿ ÿÿÿÿ*ÿÿ ÿÿÿÿ*........ 8 <at> Aÿÿ ÿÿÿÿ*ÿÿ ÿÿÿÿ*ÿÿ ÿÿÿÿ8ÿÿ ÿÿÿÿ*8 <at> Aÿÿ
ÿÿÿÿ*
> ÿÿÿÿÿÿ*hÿÿÿÿ*hÿÿÿÿ*ÿÿÿÿÿÿÿÿ
> > >  <at> A8 <at> A`ÿÿÿÿÿÿ*pÿÿÿÿÿÿ* ÿÿÿÿÿÿ* ÿÿÿÿÿÿÿÿ*
ÿÿÿÿ*ÿÿÿÿÿÿÿÿ ÿÿÿÿ*
> ÿÿÿÿÿÿÿÿÿÿ*ÿÿÿÿ* ÿÿ ÿÿÿÿ*ÿÿ ÿÿÿÿ*
> > >  Xÿÿ6  ÿÿÿÿÿÿ*ÿÿÿÿÿÿÿÿ* <at>  <at>   0 ÿÿÿÿ* ÿÿÿÿlÿÿÿÿl
ÿÿÿÿ*ÿÿlÿÿÿÿ4ÿÿÿÿ*ÿÿ  <at> Ap
> ÿÿÿÿ* S G
> > > ÿÿÿÿ* ÿÿÿÿ#ÿÿÿÿ*ÿÿÿÿ P  <at> A ;ÿÿÿÿÿÿp ÿÿÿÿ* ÿÿDÿÿ  <at> 0ÿÿlÿÿ  <at> AP
>  <at> AÿÿNÿÿÿÿ*ÿÿ  <at> AP  <at> A <at> ÿÿÿÿ*Pÿÿl
> > >  <at> Aÿÿa`ÿÿ8 <at>   <at> A <at>   <at> Aÿÿ! ÿÿÿÿrÿÿÿÿ  <at> AP  <at> Aroot <at> eme206-05 12.588636000000
> #
> > >
> > > here's the debug trace:
> > >
> > > ---------------- Debug Trace -----------------------
> > > unique: 103, opcode: LOOKUP (1), nodeid: 4, insize: 47
> > > LOOKUP /uncached/12.588636000000/memory
> > >    CALL: FSTAT path=/uncached/12.588636000000/memory
> > >    CALL: PARSENAME path=[/uncached/12.588636000000/memory]
> > >   DEBUG: Cache_Get_Device 12 58 86 36 00 00 00 18
> > >   DEBUG: Get from cache sn 12 58 86 36 00 00 00 18 pointer=(nil)
index=-1 size=4
> > >   DEBUG: value found in cache
> > >    CALL: ATTRIBUTES path=/uncached/12.588636000000/memory
> > >   DEBUG: ParsedName_destroy /uncached/12.588636000000/memory
> > >    NODEID: 5
> > >    unique: 103, error: 0 (Success), outsize: 136
> > > unique: 104, opcode: SETATTR (4), nodeid: 5, insize: 128
> > >    CALL: TRUNCATE path=/uncached/12.588636000000/memory
> > >    CALL: FSTAT path=/uncached/12.588636000000/memory
> > >    CALL: PARSENAME path=[/uncached/12.588636000000/memory]
> > >   DEBUG: Cache_Get_Device 12 58 86 36 00 00 00 18
> > >   DEBUG: Get from cache sn 12 58 86 36 00 00 00 18 pointer=(nil)
index=-1 size=4
> > >   DEBUG: value found in cache
> > >    CALL: ATTRIBUTES path=/uncached/12.588636000000/memory
> > >   DEBUG: ParsedName_destroy /uncached/12.588636000000/memory
> > >    unique: 104, error: 0 (Success), outsize: 112
> > > unique: 105, opcode: OPEN (14), nodeid: 5, insize: 48
> > >    CALL: OPEN path=/uncached/12.588636000000/memory
> > >    unique: 105, error: 0 (Success), outsize: 32
> > > OPEN[0] flags: 0x8001 /uncached/12.588636000000/memory
> > > unique: 106, opcode: WRITE (16), nodeid: 5, insize: 118
> > > WRITE[0] 54 bytes to 0
> > >    CALL: WRITE path=/uncached/12.588636000000/memory size=54 offset=0
> > >   DEBUG: FS_OWQ_create of /uncached/12.588636000000/memory
> > >    CALL: PARSENAME path=[/uncached/12.588636000000/memory]
> > >   DEBUG: Cache_Get_Device 12 58 86 36 00 00 00 18
> > >   DEBUG: Get from cache sn 12 58 86 36 00 00 00 18 pointer=(nil)
index=-1 size=4
> > >   DEBUG: value found in cache
> > > OWQ OneWireQuery structure of /uncached/12.588636000000/memory
> > >     OneWireQuery size=54 offset=0, extension=0
> > > Byte buffer OneWireQuery buffer, length=54
> > > -- 41 20 4C 6F 6E 67 20 54 65 73 74 20 49 6E 74 6F
> > > -- 20 41 6E 20 4F 57 46 53 20 44 65 76 69 63 65 2E
> > > -- 20 20 4E 6F 74 20 74 6F 6F 20 6C 6F 6E 67 20 74
> > > -- 68 6F 75 67 68 2E
> > >    <A Long Test Into An OWFS Device.  Not too long though.>
> > >     OneWireQuery I=54 U=54 F=2.66795E-322 Y=54 D=Wed Dec 31 16:00:54
1969
> > >
> > > --- OneWireQuery done
> > >   DEBUG: Selecting a path (and device)
> > > path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> > > path=00 00 00 00 00 00 00 00
> > >    DATA: DS9490_reset
> > >    DATA: DS9490_reset: ok
> > >   DEBUG:   Transaction select = 0
> > >   DEBUG:   Transaction send = 0
> > >   DEBUG:   Transaction readin = 0
> > >   DEBUG:   Transaction CRC16 = 0
> > >    DATA: DS9490_level 2 (old = 0)
> > >    DATA: DS9490_level 0 (old = 2)
> > >    DATA: DS9490_HaltPulse
> > >    DATA: DS9490_HaltPulse: loop
> > >    DATA: DS9490_HaltPulse: ok
> > >   DEBUG:   Transaction program pulse = 0
> > >   DEBUG:   Transaction end = 0
> > >   DEBUG: Wrote DS2406 byte 0 -- no errors
> > >   DEBUG: Selecting a path (and device)
> > > path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> > > path=00 00 00 00 00 00 00 00
> > >    DATA: DS9490_reset
> > >    DATA: DS9490_reset: ok
> > >   DEBUG:   Transaction select = 0
> > >   DEBUG:   Transaction send = 0
> > >   DEBUG:   Transaction readin = 0
> > >   DEBUG:   Transaction CRC16 = 0
> > >    DATA: DS9490_level 2 (old = 0)
> > >    DATA: DS9490_level 0 (old = 2)
> > >    DATA: DS9490_HaltPulse
> > >    DATA: DS9490_HaltPulse: loop
> > >    DATA: DS9490_HaltPulse: ok
> > >   DEBUG:   Transaction program pulse = 0
> > >   DEBUG:   Transaction end = 0
> > >   DEBUG: Wrote DS2406 byte 1 -- no errors
> > >   DEBUG: Selecting a path (and device)
> > > path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> > > path=00 00 00 00 00 00 00 00
> > >    DATA: DS9490_reset
> > >    DATA: DS9490_reset: ok
> > >   DEBUG:   Transaction select = 0
> > >   DEBUG:   Transaction send = 0
> > >   DEBUG:   Transaction readin = 0
> > >   DEBUG:   Transaction CRC16 = 0
> > >    DATA: DS9490_level 2 (old = 0)
> > >    DATA: DS9490_level 0 (old = 2)
> > >    DATA: DS9490_HaltPulse
> > >    DATA: DS9490_HaltPulse: loop
> > >    DATA: DS9490_HaltPulse: ok
> > >   DEBUG:   Transaction program pulse = 0
> > >   DEBUG:   Transaction end = 0
> > >   DEBUG: Wrote DS2406 byte 2 -- no errors
> > >   DEBUG: Selecting a path (and device)
> > > path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> > > path=00 00 00 00 00 00 00 00
> > >    DATA: DS9490_reset
> > >    DATA: DS9490_reset: ok
> > >   DEBUG:   Transaction select = 0
> > >   DEBUG:   Transaction send = 0
> > >   DEBUG:   Transaction readin = 0
> > >   DEBUG:   Transaction CRC16 = 0
> > >    DATA: DS9490_level 2 (old = 0)
> > >    DATA: DS9490_level 0 (old = 2)
> > >    DATA: DS9490_HaltPulse
> > >    DATA: DS9490_HaltPulse: loop
> > >    DATA: DS9490_HaltPulse: ok
> > >   DEBUG:   Transaction program pulse = 0
> > >   DEBUG:   Transaction end = 0
> > >   DEBUG: Wrote DS2406 byte 3 -- no errors
> > >   DEBUG: Selecting a path (and device)
> > > path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> > > path=00 00 00 00 00 00 00 00
> > >    DATA: DS9490_reset
> > >    DATA: DS9490_reset: ok
> > >   DEBUG:   Transaction select = 0
> > >   DEBUG:   Transaction send = 0
> > >   DEBUG:   Transaction readin = 0
> > >   DEBUG:   Transaction CRC16 = 0
> > >    DATA: DS9490_level 2 (old = 0)
> > >    DATA: DS9490_level 0 (old = 2)
> > >    DATA: DS9490_HaltPulse
> > >    DATA: DS9490_HaltPulse: loop
> > >    DATA: DS9490_HaltPulse: ok
> > >   DEBUG:   Transaction program pulse = 0
> > >   DEBUG:   Transaction end = 0
> > >   DEBUG: Wrote DS2406 byte 4 -- no errors
> > >   DEBUG: Selecting a path (and device)
> > > path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> > > path=00 00 00 00 00 00 00 00
> > >    DATA: DS9490_reset
> > >    DATA: DS9490_reset: ok
> > >   DEBUG:   Transaction select = 0
> > >   DEBUG:   Transaction send = 0
> > >   DEBUG:   Transaction readin = 0
> > >   DEBUG:   Transaction CRC16 = 0
> > >    DATA: DS9490_level 2 (old = 0)
> > >    DATA: DS9490_level 0 (old = 2)
> > >    DATA: DS9490_HaltPulse
> > >    DATA: DS9490_HaltPulse: loop
> > >    DATA: DS9490_HaltPulse: ok
> > >   DEBUG:   Transaction program pulse = 0
> > >   DEBUG:   Transaction end = 0
> > >   DEBUG: Wrote DS2406 byte 5 -- no errors
> > >   DEBUG: Selecting a path (and device)
> > > path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> > > path=00 00 00 00 00 00 00 00
> > >    DATA: DS9490_reset
> > >    DATA: DS9490_reset: ok
> > >   DEBUG:   Transaction select = 0
> > >   DEBUG:   Transaction send = 0
> > >   DEBUG:   Transaction readin = 0
> > >   DEBUG:   Transaction CRC16 = 0
> > >    DATA: DS9490_level 2 (old = 0)
> > >    DATA: DS9490_level 0 (old = 2)
> > >    DATA: DS9490_HaltPulse
> > >    DATA: DS9490_HaltPulse: loop
> > >    DATA: DS9490_HaltPulse: ok
> > >   DEBUG:   Transaction program pulse = 0
> > >   DEBUG:   Transaction end = 0
> > >   DEBUG: Wrote DS2406 byte 6 -- no errors
> > >   DEBUG: Selecting a path (and device)
> > > path=/uncached/12.588636000000/memory SN=12 58 86 36 00 00 00 18 last
> > > path=00 00 00 00 00 00 00 00
> > >    DATA: DS9490_reset
> > >    DATA: DS9490_reset: ok
> > >   DEBUG:   Transaction select = 0
> > >   DEBUG:   Transaction send = 0
> > >   DEBUG:   Transaction readin = 0
> > >   DEBUG:   Transaction CRC16 = 0
> > >    DATA: DS9490_level 2 (old = 0)
> > >    DATA: DS9490_level 0 (old = 2)
> > >    DATA: DS9490_HaltPulse
> > >    DATA: DS9490_HaltPulse: loop
> > >    DATA: DS9490_HaltPulse: ok
> > >   DEBUG:   Transaction program pulse = 0
> > >   DEBUG:   Transaction end = 0
> > >   DEBUG: Wrote DS2406 byte 7 -- no errors
> > >   DEBUG: Selecting a path (and device)
> > ><<snip>>
> > >
> > >
> >
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> > Defy all challenges. Microsoft(R) Visual Studio 2005.
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> > Owfs-developers <at> lists.sourceforge.net
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> >
> >
> 
> -------------------------------------------------------------------------
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> Defy all challenges. Microsoft(R) Visual Studio 2005.
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Rob Conway | 2 Oct 13:08 2007

Re: Data error reading DS2423 counters

ANy news on reading counter values for 2423 ?
 
cheers
 
rob
----- Original Message -----
From: Rob Conway
Sent: Wednesday, September 26, 2007 10:03 PM
Subject: Re: [Owfs-developers] Data error reading DS2423 counters

Was there a resolution for this problem...?  I had ignored the thread previously since my NSLU2 was not effected ....
I moved from a NSLU2 SLUG 6.8 running owfs - 2.6p1-3 where my counters worked great.  I have just built a ubuntu box running owfs 2.6p6 as of 1 week ago...I thought everything was OK as my physical network has not changed since moving to a ubunutu box however, now like others, my DS2423 counters return "error" for all counter values.
 
The owhttpd generated page for my DS2423 gives states "Error: Invalid
Argument" for;
- counters.ALL
- counters.A
- counters.B
- memory
- mincount
- pages/ { all entries }

The other entries appear to be fine.
 
 
cheers
 
rob
 
 
----- Original Message -----
From: Rob Conway
Sent: Tuesday, May 01, 2007 7:22 AM
Subject: Re: [Owfs-developers] Data error reading DS2423 counters

see below for unslung 6.8 SLUG
 
 
I run  a DS2423 on an NSLU2 and it works fine....

"owfs - 2.6p1-3"

# /opt/bin/owread -s 3002 1D.EBEF0900000034/counters.A
     8998369#

cheers

rob
----- Original Message -----
Sent: Tuesday, May 01, 2007 12:52 AM
Subject: Re: [Owfs-developers] Data error reading DS2423 counters

Hi all, FWIW all my DS2423 devices on the slug are now reading errors. Does anyone remember which version these still worked for?

 

From: owfs-developers-bounces <at> lists.sourceforge.net [mailto:owfs-developers-bounces <at> lists.sourceforge.net] On Behalf Of Paul Alfille
Sent: Sunday, 29 April 2007 11:56 AM
To: owfs-developers <at> lists.sourceforge.net
Subject: Re: [Owfs-developers] Data error reading DS2423 counters

 

I've been looking at the code.

Can you post what kind of errors you are getting? Perhaps debug output?

Paul Alfille

On 4/27/07, Paul Alfille <paul.alfille <at> gmail.com> wrote:

Hacker's guide:

code is in: DS2423 is in module/owlib/src/c/ow_ds2423.c
debugging: --foreground --error_level=9
sniffing: use an extra "LINK" adapter and the src/sniffer/linksniff program (just run "make" in that directory).

Paul Alfille




On 4/27/07, Matthias Urlichs < smurf <at> smurf.noris.de > wrote:

Hi,

njh:
> Ok, I just soldered one up and plugged it in.  I get roughly the same
> error:

Ouch. Any ideas where that comes from?

owserver doesn't seem to actually log anything special.
A Hacker's Guide (or, if it already exists, a pointer to it) which
gives one a few pointers WRT where to start finding that kind of problem
would be appreciated.

--
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Disclaimer: The quote was selected randomly. Really. | http://smurf.noris.de
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Sven Geggus | 2 Oct 15:30 2007
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Re: Debian+Ubuntu package availability

Matthias Urlichs <smurf <at> smurf.noris.de> wrote:

> Debian packages have been uploaded to Unstable; I'll provide backports
> once the packages has passed Debian's new-upload processing.

Where did the package go?

While it disappeared from http://ftp-master.debian.org/new.html,
it is still unavailable in http://incoming.debian.org/ or even
at ftp.debian.org.

Sven

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Matthias Urlichs | 2 Oct 15:45 2007
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Re: Debian+Ubuntu package availability

Hi,

Sven Geggus:
> > Debian packages have been uploaded to Unstable; I'll provide backports
> > once the packages has passed Debian's new-upload processing.
> 
> Where did the package go?
> 
> While it disappeared from http://ftp-master.debian.org/new.html,
> it is still unavailable in http://incoming.debian.org/ or even
> at ftp.debian.org.
> 
I's been rejected because I overlooked two annoying details.
Will fix this week, and re-upload. Hopefully.

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Matthias Urlichs   |   {M:U} IT Design  <at>  m-u-it.de   |  smurf <at> smurf.noris.de
Disclaimer: The quote was selected randomly. Really. | http://smurf.noris.de
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Paul Alfille | 2 Oct 16:01 2007
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Re: Writing to DS2406

On 10/1/07, Jim Kusznir <jkusznir <at> gmail.com> wrote:

We actually found that the DS9490R includes a zener diode (in package
DS9503P) that limited the output.  We removed and properly bypassed
it, and now get programming pulses to 10.5V, which appears sufficient
to burn the prom.  We are sucessfully burning the eprom in the 2506's!

This is great news! Thanks for testing and confirming that EPROM programming can work.

There are three other devices that use EPROM. (DS2502 DS2505 DS2506) I'll make sure they get updated as well.

Paul Alfille
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Gmane