Flexcomm serial single pin TXD usage

[pejo]

Hi there,

I don't have much experience in configuring Flexcomm and pin ports for LPC5504. I have the pin FC3_TXD_SCL_MISO_WS available but the rest of the FC3 serial port pins are being used as simple PIO/ Digital Input Output pins (Function=0).

I was wondering if it is possible to use only the Flexcomm 3 TXD pin for  communication (basically sending debug information) while keeping the rest of the pins for other functions like DIO.

[Harry_Zhang · Accepted solution]

Hi @pejo 

Yes, you can use only the FC3_TXD pin for communication while keeping the other Flexcomm 3 (FC3) pins as GPIO. The LPC5504 allows configuring individual pins for different functions within the Flexcomm peripheral, so you don’t need to enable the full UART interface.

BR

Harry