 Sl-7500c 128m Flash Upgrade Failed!, Is there still hope? |
  Sep 18 2006, 07:05 PM
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#1
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Group: Members Posts: 114 Joined: 12-May 06 Member No.: 9,848  |
Last week I opened my Zaurus SL-7500C and replaced the Flash chip with a K9F1G08UOM. (My original chip is also K9F... the only difference is the capacity).
I carefully checked the pins to make sure they are properly connected. Then I booted to the Service Menu using Fn+D+M. The up-right corner of Sevice Menu shows "SL-C760". But the chip wasn't properly recognized. Clicking on the version list gave me the following information: CPU: PXA255 A0 Board: c760 Serial No: 00000b0d ROM Checksum: bca1 RAM Size: 65536KB NAND modules(0MB) unknown[unknown] I tried all the NAND Flash related command (NAND restore and NAND Full Erase) in the service menu and they all gave me an "Error -2". Restoring NAND backup or installing U-Boot didn't work either. I can't put back my original chip because I damaged it when I removed it. (There must be some glue under the chip.) So basically my 7500 is dead. I heard that somebody has successfully upgraded their Flash chip. So maybe he can share his experience with me. I'd be very appreciated. |
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Oct 1 2006, 02:34 AM
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 Group: Members Posts: 1,376 Joined: 11-January 04 From: Poznań, Poland Member No.: 1,413 |
albertr: iirc there was infos that cxx00 serial i/o port is 'JTAG only' now - not to be used by users at all...
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Nov 28 2006, 02:55 PM
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#3
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Group: Members Posts: 48 Joined: 21-November 05 Member No.: 8,576 |
QUOTE(Hrw @ Oct 1 2006, 11:34 AM) albertr: iirc there was infos that cxx00 serial i/o port is 'JTAG only' now - not to be used by users at all...  I came accross this post and perhaps this is the wrong place to resume, but i read so many things about the JTAG thing on I/O. At the moment i'm completely confused about the signals on the I/O connector of the C1000/C3x00. In an older post albertr mentioned he got nothing valid out of the serial lines on his C1000. In another post some reported, that the standard sharp serial cable (C170) is still working with the C1000 as well as with the C3x00 devices. I personally use a C3100 and was able to get something out of the serial lines with a homemade cable. So i assume that the serial port is still there. For now it is not completely tested, but let's assume pin 3-7 and pin 14 might still carry the serial lines of ttyS0. Excluded are pins 1,2 and 15,16 of the I/O which are told not to be connected internally (formerly used as power input). Pin 11 (VCC3) and Pin 8 (GND) deliver 3.3V power. That's verified. How about the USB pins of the traditional I/O connector pinout? Did anyone make some measurements or had success to make these lines work for USB? If USB is not there, 4 pins are left to carry JTAG. This is the absolute minimum for using this interface. nTRST may not be needed to toggle some pins (i once used a PXA255 design which didn't use it either). If i remember correctly, the first one who mentioned the JTAG on I/O port was Trisoft. Perhaps they know? I don't. But i'd really like to find out!!! Perhaps one should put it down as a new topic, maybe i do. Regards, scholbert |
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Nov 30 2006, 06:19 PM
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#4
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Group: Members Posts: 535 Joined: 7-March 04 Member No.: 2,195 |
QUOTE(scholbert @ Nov 28 2006, 05:55 PM) 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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Dec 1 2006, 06:28 AM
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#5
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Group: Members Posts: 48 Joined: 21-November 05 Member No.: 8,576 |
QUOTE(albertr @ Dec 1 2006, 03:19 AM) QUOTE(scholbert @ Nov 28 2006, 05:55 PM) 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 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 |
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Posts in this topic
wrc4 Sl-7500c 128m Flash Upgrade Failed! Sep 18 2006, 07:05 PM
Reaper I'm going to upgrade my C3000 and the first th... Sep 18 2006, 08:33 PM
wrc4 QUOTE(Reaper @ Sep 18 2006, 08:33 PM)I'm ... Sep 19 2006, 12:11 AM Hrw wrc4: you probably need to use same chip as the on... Sep 19 2006, 04:10 AM wrc4 QUOTE(Hrw @ Sep 19 2006, 04:10 AM)wrc4: you p... Sep 19 2006, 05:08 AM wrc4 I found a same 64MB chip as the previous one and s... Sep 22 2006, 01:50 AM chyang Wow, so cool.
I even asked the maker on this repai... Sep 22 2006, 02:08 AM pelrun What was the full code on the original chip? When ... Sep 22 2006, 05:36 AM wrc4 pelrun,
The full code is:
K9F1G08UOM YCBO
I wil... Sep 22 2006, 04:52 PM pelrun No, I meant the original chip from your Z, you alr... Sep 22 2006, 07:49 PM wrc4 QUOTE(pelrun @ Sep 22 2006, 07:49 PM)No, I me... Sep 23 2006, 12:54 AM pelrun From the datasheets, the K9F1208UOM ID is 76C0, bu... Sep 23 2006, 08:04 AM wrc4 QUOTE(pelrun @ Sep 23 2006, 08:04 AM)From the... Sep 23 2006, 04:36 PM pelrun How would you replace the firmware if you need the... Sep 23 2006, 06:30 PM wrc4 QUOTE(pelrun @ Sep 23 2006, 06:30 PM)How woul... Sep 23 2006, 07:37 PM guylhem The easiest way is to fill up the new chip with a ... Sep 25 2006, 03:58 AM speculatrix is it possible to put a jtag interface on the Z an... Sep 26 2006, 12:59 AM albertr I belive that JTAG is available on the Zaurus, At ... Sep 26 2006, 08:33 AM guylhem The P2ROM is where the FN+D+M menu is stored, but ... Sep 28 2006, 07:02 AM Hrw http://www.hrw.one.pl/2006/08/09/sharp-zaurus-jtag... Sep 28 2006, 11:20 PM albertr Hrw, your link must be for old Zaurii models, like... Sep 30 2006, 03:15 PM Reaper My old (and bricked due to KB cable/connector prob... Oct 1 2006, 08:35 AM guylhem Hrw - I didn't see that in the 3xxx service ma... Oct 4 2006, 01:25 AM Reaper Thank you very much for advice. I'll try it as... Oct 4 2006, 09:59 AM Hrw Hmm. checked in 3100sm and there is UART connected... Nov 28 2006, 04:23 PM scholbert QUOTE(Hrw @ Nov 29 2006, 01:23 AM)Hmm. checke... Nov 29 2006, 07:14 AM guylhem According to the datasheets, there are JTAG lines ... Dec 1 2006, 04:32 AM albertr No problem, I just wanted to set the record streig... Dec 1 2006, 11:13 AM pelrun The 3100 schematic definitely provides for JTAG wi... Dec 1 2006, 06:32 PM scholbert Hi pelrun,
great information. I thought it would ... Dec 3 2006, 02:10 PM |
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