option byte of STM32H743VI was modified abnormal when I debug it by IAR, FZ_IWDG_STOP and FZ_IWDG_SDBY default value is 1, but after modified abnormal, I found the option bytes bits change to 0 except NRST_STOP_D1 bit, and then I try to reset all bit...

I have tried to read ILI9341 LCD controller ID (D3H), but it doesn’t work until now, the EXTC has been high, the result as below:1. The leve1 command read/write is OK. The leve2 command (EXTC should be high to enable this command) write is OK, read b...