UART Pins in nRF8122 CFAC package

[HLR]

Hi 

I assigned one LED Signal to P0.08 pin in nRF8122 CFAC package as per pin assignment it shows as digital GPIO 

But in Firware wise when checking the LED Does not glow , my firmware engineer says it is UART pin so there is issue

It mentions that 

" The GPIOs used for each UART interface line can be chosen from any GPIO on the device and are
independently configurable. This enables great flexibility in device pinout and efficient use of board space
and signal routing." 

want to know what are the GPIOs which can be used as UART pins. 

[Håkon Alseth]

Hi,

 

Any unused GPIO can be used for bus communication, like UART/SPI/TWI.

It all depends on how your have routed this on your own board.

 

Best regards,

Håkon

[HLR]

Well i have used P0.08 as GPIO it is been routed unlike differential pairs 

my goal is to use it as GPIOs but firmware wise they say since it is UART pin it is affecting GPIO functionality 

wanted to know any where specifically mentioned about assigned pins for UART , this is will be useful for further reference

[Håkon Alseth]

On the nRF52-DK, P0.08 is connected externally as RXD, but this is specific to the nRF52-DK (pca10040). In your board, you can use this GPIO as you'd want. The pin crossbar in the nRF5-series devices is flexible for all digital peripherals, so you can choose which GPIO is used for UART.

Cheers,

Håkon

[HLR]

ok thanks Hakon Alseth 

cleared my doubt thanks