4 Replies Latest reply on Apr 20, 2014 7:47 PM by Hui.Wang

    Do the UART0 TX and RX can work by default

    Hui.Wang

      The UART0 txd and rxd are routed to a connector, but through reading the schematic, I found these two signals are mutiplexd with gpio0 and gpio1, the multiplex controls are from ioexpander chip, the ioexpander chip is controlled by an eeprom or i2c master.

       

      I want to know if I just let the board boot up from the sd card image, do the txd and rxd on the connector connect uart0 or gpio?