SPI/I2C#1LDOEN2MISO/SDA3SCLK/SCL4CS#/A05MOSI/A16IRQ#7RST#8VL9DGND10GPIO011GPIO112GPIO213GPIO314RTS0#15CTS0#16RX017TX018GPIO419GPIO520GPIO621GPIO722RTS1#23CTS1#24RX125TX126GPIO827GPIO928GPIO1029GPIO1130RTS2#31CTS2#32RX233TX234GPIO1235GPIO1336GPIO1437GPIO1538RTS3#39CTS3#40RX341TX342VEXT43XOUT44XIN45AGND46VA47V1848EP49