Extending dual bank flash to two QSPI flashes in XIP mode in STM32H753

[Rajesh Tripathi]

Posted on December 16, 2017 at 22:38

The Dual bank mechanism works by switching internal flash banks while code address stays the same. How to extend this mechanism to two external QSPI flashes operating in XIP mode?

Is gating QSPI chip select using a GPIO pin to select the desired QSPI flash the only way? or the QSPI flash's address in memory space can be remapped?

[S.Ma]

Posted on December 17, 2017 at 07:34

How about using 2 GPIO having the same alternate function chip select pins, or clock pins?

This is similar to the I2C EEPROM playing with their slave address select pins or SPI NSS in parallel mode.

[Peter Chang]

Posted on March 05, 2018 at 05:25

Dual QSPI Flash will be combine to odd even address in STM32 MCU view point.

One QSPI Flash store odd address data & the other one store even address data.