The Raspberry 2/3 contain two UARTs, UART0(PL011) and UART1 which is mini UART. Raspberry Pi 2/3 supports the serial transport for communication through the PL011 UART. This is set by default in kernel debugging scenarios. An application or device driver can use the PL011 UART to send and receive data with the PL011 device driver turning off the debugger using the command 'bcdedit /set debug off '. More info please see Release Notes for Build 17763.253.
If the answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.