AN4760 – Quad-SPI interface on STM32 microcontrollers and microprocessors
How to create an external QSPI loader MOOC
MOOC – External QSPI loader how to, Tilen Majerle
github.com/STMicroelectronics/stm32-external-loader/tree/contrib
QSPI in STM32 || Write and Read || N25Q
QSPI in STM32 || Boot from EXT Memory || XIP || N25Q
github.com/controllerstech/STM32/tree/master/QSPI