User's Manual

4/13 Rev1.2
1. UART Interface
MESSI-V M2 board supports one UART port for debugging and downloading. The baud
rate speed is up to 115200bps. Signal level is 3.3V. If MESSI-V M2 module goes
through standard RS-232 interface to connect with PC, It is recommended to use TI
TRS3253EIRSMR for best baud rate to catch log file and download boot loader setting.
Pin NO.
Pin name
Description
62
UART_RX
UART receive input
64
UART_TX
UART transmit output
Figure1-1: UART block diagram.
Figure1-2: RS-232 connection