I believe this bios chip is currup so I'm trying to reprogram the chip but my programmer could not auto detect the chip. I want to know what type of chip to select to write it wit my programmer.
Adesto AT25QF641 SUB
Adesto AT25QF641 SUB
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Re: Kindly identify this bios chip
Hi.
1) Datasheet for this chip is attached.
2) Datasheet notes that the device is compatible with a 3v3 power rail - so your programmer should be able to support this.
3) Ignore the use of auto-detect since the look up table (database) is stale and appears to not support the IDs that are embedded inside this component.
The reading of the IDs is JEDEC standard so EVERY FLASH chip on the market must allow for the same commands / same timing to read out the IDs inside the flash device.
Confirm this detail that you can read out the IDs -> compare them to what is inside this datasheet. Do they match ?
If not a match then the IC is defective or not seated properly inside your programmer tool.
4) After the above confirmation, try a more common flash family from perhaps Winbond.
Can your programmer be configured to ignore the ID ?
That is, in the end, the programmer is spitting out SPI commands which are common to 99.999% of the flash industry. The programmer tool is only required to send out simple SPI commands -> to erase -> to read / write from a PC memory space.
So it should be possible to read in the known good contents from a file into your PC -> allow for the programmer tool to erase this chip -> program the chip using standard SPI commands (using Winbond as an example) -> verify the contents.
SPI is slower than QSPI (Quad SPI) but for this case, keep it simple.
A number of years ago we tested a batch of different flash memory devices to see how fast we could program them using QSPI mode. Recall Adesto as a good brand that could operate at high data rates. -
Re: Kindly identify this bios chip, Adesto AT25QF641 SUB
what model is your programmer and the software versionOriginally posted by Awejire View PostComment
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