CC2538: Pins for UART

Went Cao

Part Number: CC2538

Dear All

I check the datasheet,it said there are two UART, but in "4.1 Signal Descriptions" ,PA0 and PA1 are UART TXD and RXD. where is another UART ? Which pins can be used to another UART ?

over 6 years ago

0 YiKai Chen over 6 years ago

Guru 735685 points

All of IO pins on CC2538 can be configured as UART pins.

0 Went Cao over 6 years ago in reply to YiKai Chen

Genius 5550 points

Dear YiKai

Thank you.

So, all IO can be used to PWM,INT ? And only PA0~7 can be used to ADC ?

0 YiKai Chen over 6 years ago in reply to Went Cao

Guru 735685 points

Yes.

0 Went Cao over 6 years ago in reply to YiKai Chen

Genius 5550 points

Dear YiKai

Below picture, "ROM bootloader UART RXD", it mean when boot, must use this pin to print log ?

0 YiKai Chen over 6 years ago in reply to Went Cao

Guru 735685 points

No, that is the serial pin used by serial boot loader in CC2538 ROM.

0 Went Cao over 6 years ago in reply to YiKai Chen

Genius 5550 points

Dear YiKai

OK, it's used to bootloader from that UART pins, not printed log.
Thanks.

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CC2538: Pins for UART