Author Topic: Sl-7500c 128m Flash Upgrade Failed!  (Read 32408 times)

scholbert

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Sl-7500c 128m Flash Upgrade Failed!
« Reply #30 on: December 01, 2006, 09:28:18 am »
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Quote
In an older post albertr mentioned he got nothing valid out of the serial lines on his C1000.

No, I never said that. In fact, I posted many times on this (and other forum) that serial UART lines are available on Sharp I/O port on 1000/3x00 Zaurii. They are logical 3V TTL levels, so need RS232 tranceiver. In fact, I'm using it on my C1000 with Sharp serial cable quite often.

There's no JTAG lines on Sharp I/O port on 1000/3x00 AFAIK.
-albertr
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Hi albertr,

i'd really like to apologize for my statement   .
I didn't remember the exact post as i wrote these lines and i thought it was you who once mentioned kind a thing. Blame on me  

Never ever i'll write something down again, if i do not exactly know where i got it from.
At least i wanted to point out that there were many different opinions about the serial stuff and I/O connector.

But it seemed that i was the only one confused    !

Perhaps this is a good moment for me to send a personally "thank you, albertr".
It amazing what you have done so far and what information you put down into this forum!  

Let me go back to the topics.

guylhem may be right.
I think there could be some kind of gate logic inside C1000/3x00, which is activated with pin 13 and maps the JTAG lines to the pins 5,6,7 and 14 on the I/O connector.

I will do some investigation. Unfortunately i got no schematic of the device.

scholbert
« Last Edit: December 01, 2006, 09:53:49 am by scholbert »
C3100: with cacko rom 1.23
Intel PRO/Wireless CF-Card, Socket LP-E LAN CF-Card
some CF, SD, MMC memory cards

albertr

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Sl-7500c 128m Flash Upgrade Failed!
« Reply #31 on: December 01, 2006, 02:13:18 pm »
No problem, I just wanted to set the record streigth.

If I'm not mistaken, Guylhem probably mentioned the older models, not pxa270-based C1000/3x00....
Thanks.
-albertr

pelrun

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Sl-7500c 128m Flash Upgrade Failed!
« Reply #32 on: December 01, 2006, 09:32:12 pm »
The 3100 schematic definitely provides for JTAG wired to behave as scholbert says: holding pin 13 high remaps 5 as TDI, 6 as TMS, 7 as TDO, 14 as TCK.

Unfortunately it looks like all the components in that circuit have been left off the production board, as one of albertr's nice highres photos of the board shows unpopulated chip positions right where I'd expect to see the two TC7WB66FK bus select chips, and the schematic has all the components in that part of the circuit marked as "OPEN".  
« Last Edit: December 01, 2006, 09:33:19 pm by pelrun »
SL-C3100 with usb power mod running debian eabi
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scholbert

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Sl-7500c 128m Flash Upgrade Failed!
« Reply #33 on: December 03, 2006, 05:10:23 pm »
Hi pelrun,

great information. I thought it would be like that.
I just quoted your posting in the C1000/3x00 Hardware section.

Just for completion of the information about the I/O connector.
I hope it's O.K. for you that way!

Perhaps this could be very helpful to those who are interested in upgrading flash or (un)bricking their device completely   !

Greets,

scholbert
C3100: with cacko rom 1.23
Intel PRO/Wireless CF-Card, Socket LP-E LAN CF-Card
some CF, SD, MMC memory cards