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A1502 (820-3476-A) Can not read 25Q064A https://vlab.su/viewtopic.php?f=51&t=49804 |
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tunsie [ 18 авг 2016, 17:44 ] | |
Заголовок сообщения: | A1502 (820-3476-A) Can not read 25Q064A |
Hi, I've a problem with reading the chip 25Q064A i use tl866cs and ezp2010 both off them doesn't recognize it some help will be appreciated MacBook Pro A1502 820-3476-A 25Q064A |
simpleboy123 [ 18 авг 2016, 18:14 ] | |
Заголовок сообщения: | Re: A1502 (820-3476-A) Can not read 25Q064A |
try 25L6406E or ST Brand or Micron brand above 1 of 3 will work hopefully and your ic brand is Numonyx also search for it your programmer. |
tunsie [ 18 авг 2016, 18:45 ] | |
Заголовок сообщения: | Re: A1502 (820-3476-A) Can not read 25Q064A |
unfortunately without success |
simpleboy123 [ 19 авг 2016, 18:39 ] | |
Заголовок сообщения: | Re: A1502 (820-3476-A) Can not read 25Q064A |
then problem is mainly with your ic change your ic.bios file is availible on this site is this simple? |
tunsie [ 20 авг 2016, 13:08 ] | |
Заголовок сообщения: | Re: A1502 (820-3476-A) Can not read 25Q064A |
I tried a few dumps system starts very slow. But yesterday i solved the problem i shorten the cables to 1 inch after then i was able to read and write |
Shooter75 [ 13 окт 2016, 11:48 ] | |
Заголовок сообщения: | Re: A1502 (820-3476-A) Can not read 25Q064A |
Problem is in 1,8Vcc at "Q" series chips. I modified my 5VDC SOIC8 ZIF adapter. 1. I cutted VCC line from ZIF to DIP. 2. Added in line two diodes in sequence, it make voltage drop approximative 1.4V 5-1,4 = 3,6v 3. Added a jumper between ZIF Vcc and DIP Vcc pins. It restores 5Vcc in other cases. 4. And then I added another line of two diodes in cutted Vcc line and added one more jumper. 3,6V-1,4V=2,2V This is enough to operate with "Q" series SPI FLASH ROMs. In total I made power bus in this mode: [2,2VDC] ZIF-Vcc-|<|-|<|-.[3.6VDC].-|<|-|<|-DIP-Vcc [5VDC] And all works excellent! |
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