UART pins in MDBT50Q.

[Abhimanyu K K]

I have found that there are 2 UART in MDBT50Q BLE. But I can't found any RX and TX pins in the schematic. Please help me to find out this

[Simonr]

Hi

In the nRF52840 any GPIO pin, except SWDIO, SWDCLK and USB, can be used as UART pins. I recommend only using those that the MDBT50Q data sheet states to be regular GPIO pins. 

#define RX_PIN_NUMBER  NRF_GPIO_PIN_MAP(PORT, PIN)
#define TX_PIN_NUMBER  NRF_GPIO_PIN_MAP(PORT, PIN)
#define CTS_PIN_NUMBER NRF_GPIO_PIN_MAP(PORT, PIN)
#define RTS_PIN_NUMBER NRF_GPIO_PIN_MAP(PORT, PIN)

This is an example on how to define them. 

Best of luck and kind regards,

Simon

EDIT: The NFC pins (P0.09 and P0.10) should not be used either. You can use them, but you will have to configure them to regular GPIO pins first.

[Abhimanyu K K]

Thanks sir.

But just one doubt, Is the RX_PIN_NUMBER, TX_PIN_NUMBER and all are inbuilt or new variable.