I am programming my new PCB with S25FL127SAB and I wish to initialize it correctly. In particular I want to set up the configuration register for quad operation but do not want to waste any of the 100K erase/write operations etc.
I have prepared a basic list and would like some help to complete the initialization from here:
Desired setup and operations:
Use 8 pin package
Operate in quad mode (QSPI)
Four byte addressing mode
XIP mode except during initialize, erase and program operations
RESET FUNCTION:
Send device QSPI_COMMAND_XIP_EXIT_CODE (0xFF)
Send device QSPI_COMMAND_RESET_ENABLE (0x66)
Send device QSPI_COMMAND_RESET_DEVICE (0x99)
INITIALIZE FUNCTION:
Initialize microcontroller for QSPI operation 50 Mhz
Call reset function (see above)
Read and verify device information
Send device QSPI_COMMAND_READ_ID (0x9F)
Read Manufacturer – works OK = 0x01
Read memory type – works OK = 0x20
Read memory capacity – works OK = 0x18
From here to end of initialization need Cypress help !!!
Want to set for quad operation - set non-volatile once, not with each power on cycle
Want to set up for 4 byte addressing
Any other initialization that is needed.
Thanks for your help !!!
Steve Dillier
HighPoint Design
972.753.2622
