Connecting to at45db dataflash memory

March 24, 2017, 06:41:53 pm

Hoping someone here may be able to help. I just got the bus pirate 3.6a for the primary purpose of erasing at45db641e dataflash memory. Firmware 5.1 bootloader 4.4

I've been unable to get it to read from the memory at all.

I am following http://dangerousprototypes.com/docs/AT4 ... ash_memory as a guide.

Connecting as follows:
Bus Pirate     AT45DB
MOSI     SI
CLOCK     SCK
MISO     SO
CS     CS
GND     GND

I've also tried connecting WP and Reset to 3.3v to make certain they are not causing trouble.

Setup as follows:
enter m and then 5 for SPI. Then select all defaults except for Normal Output.
Power On   W

I then enter [0x9f r:4] to read the Chip ID, always get back: READ 0x00 0x00 0x00 0x00

I've tried this both with at54db641E and at45db321E with the same results.

Any ideas or suggestions?

Thanks!

-Doug

Re: Connecting to at45db dataflash memory

Reply #1 – March 26, 2017, 08:09:41 pm

No ideas? Please, I am fairly desperate for any suggestions.

Is it possible I need an upgraded firmware? Are there any known problems with Atmel/Adesto dataflash memory?

Anything? Anyone?

-Doug

Re: Connecting to at45db dataflash memory

Reply #2 – March 30, 2017, 11:25:59 am

Upgrading wont hurt.

Is the chip still in circuit? It could be other circuitry is messing up or pulling the reset low. Best practice is to unsolder the chpi.

How did you power the chip? I don't see how you did this.