Read W25Q128JV failed with QSPI.

[Justin_Yeh]

Hi Sir 

I tried to read W25Q128JV with QSPI API, but the response data always incorrect. (last some bytes become to 0x0..)

I checked the spec, this flash default supports QSPI, I don't know what happened, please help.

if read 1 bytes from address 0

0x0

if read 4 bytes from address 0

0xFF    0x0     0x0     0x0    // last some bytes always are 0x0 ??

[MartinBL]

Hi,

Can you show us how you configure the QSPI and how you perform the read operation?

What data do you expect to see?

Are you able to write data to the device?

Do you have a logic analyzer that you can use to check the integrity of the SPI signals?

[Justin_Yeh]

We find the root cause, Thanks for your help.

[ricardo vasquez rossi]

hi Justin
Could you share, what was the root cause?
thanks
Ricardo