1.GPIO_SD_B1_05外部下拉后,使用NXP MCUBootUtility v3.5.0烧录程序会出错。
2.悬空或者外部上拉,烧录运行都正常。再改成下拉程序也不能运行
3.外部上拉后,在代码中配置成GPIO模式会卡死
Solved! Go to Solution.
Hi @jarman_zhou ,
I guess this is because GPIO_SD_B1_05 is flexspi_A DQS. To have the flash running higher than 60M, this pin must floating. To verify this, you can set flexspi frequency lower than 60M to see if the problem disappear.
Regards,
Jing