UART Header

I/O1 Xplained Pro features a 2-pin header with access to the UART pins of the 20-pin extension connector. This two pin header comes with a jumper mounted to enable the UART to work in loopback mode. Both UART lines are terminated with 39Ω series resistors.

Table 1. UART Header
Pin on EXT connector Silk screen marking
14 TX
13 RX