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Sep 27, 2017 - What would be easiest way to flash Winbond 25Q32 or 25Q64 (both. Through UART, however at least do not require special programmer.

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Hello community, I am attempting to flash (or at present probe) the Winbond 25Q64 BIOS chip on a motherboard using the Bus Pirate. I went about this in the most common sense way, but it didn’t work; so I troubleshot until I found what I believe to be the problem. I may have overlooked something simple, however, so I will be giving a detailed account of exactly what I have done (so be prepared for a long post). First, the chip I am trying to flash is the Winbond 25Q64BV, whose datasheet is. Anyway, it is an 8-pin package, but two of the pins (write-protect and hold) are not relevant to me.

So I use the following connections: Code: Bus Pirate W25Q64BV CS /CS 3.3V VCC MISO DO CLK CLK GND GND MOSI DI Simple enough. Then, I use flashrom to try to probe the chip: Code: $ flashrom -VVV -c W25Q64 -p buspirate_spi:dev=/dev/ttyUSB0 flashrom v0.9.5.2-r1540 on Linux 3.3.3-gentoo (x86_64) flashrom is free software, get the source code at flashrom was built with libpci 3.1.9, GCC 4.6.2, little endian Command line (5 args):./flashrom -VVV -c W25Q64 -p buspirate_spi:dev=/dev/ttyUSB0 Calibrating delay loop. OS timer resolution is 2 usecs, 1088M loops per second, 10 myus = 12 us, 100 myus = 100 us, 1000 myus = 995 us, 10000 myus = 9933 us, 8 myus = 9 us, OK.

Hi osor, I'm sorry about the problem, thanks for the detailed report. Just to verify: 1. CS high is 3.3volts when you are NOT connected to the chip 2.

When you connect to the chip, CS only reaches 1.6volts Is it possible the chip pin is grounding for some reason? Punar vivah serial songs mp3 free download. (incorrect connection) The chip is in the motherboard, is it possible the MB is holding that pin low? Do you have a 2K to 100K resistor handy?

Try connecting one side of the resistor to a 3.3volt supply (bus pirate maybe) and the other end to the CS pin of the in-situ flash chip. Measure the voltage on the pin. It should be 3.3volts, but if something is pulling low it will be 0volts. A firmware issue is certainly possible, but common stuff in v5.10 is very well tested.

You could perform the opposite test on the Bus Pirate. Connect the on-board pullup resistors to ground (Vpu to GND). Enable them in the terminal (P) and then raise CS high. If it is in hiz or a hardware failure, it read 0volts/low in the i menu. I will load v5.10 and check it out later today, you could also try the latest v6.1.