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CC2340R5: ROM Bootloader Default

Part Number: CC2340R5

我使用了ROM Bootloader的Uart方式去更新Application,但目前遇到的問題是假設今天我Uart的RX跟TX分別設在DIO12跟DIO13這一組,如果更新失敗,並且CCFG區域已經被Erase掉,那Uart的RX以及TX就會跳回預設的DIO20跟DIO22這一組,但是我的CC2340是只有24個Pin的,就不會有DIO20跟DIO22,這樣的狀況會導致之後如果要在更新就會不能更新,我該如何去將預設的Uart改成DIO12跟DIO13?