Pin for UART Communication and Power Supply

Technical Subjects Software Internet Protocol
1

Hi,

We have a custom board where we plan to connect a BC66.

Have the following questions:
1 ) Which pins we can use as a uart (Rx-Tx) to connect with external MCU (Custom board) for sending AT commands.

2)Custom board is able to provide 3.2 volt for BC66 (operating voltage), on which pin we can use for power supply input.

Best Regards

2

I have sent the hardware design reference of BC66 to your email

3

We did try to connect the MCU to pin 17-18 (also tried DBG and AUX uart) but with no success.

4

You need to refer to the TXD/RXD circuit design

5

We actually did.

But we can’t communicate with the UART no matter what PIN we use or technique.

6

I suggest you first use the USB-to-serial converter to connect the UART pin for debugging and disconnect the mcu