UART Console

The UART0 is a debugging console. The logic level is 1.8V.

PlayStation TV UART0 location

OLED Vita UART5 location

It is on the PCI-E connector pins 8,10,12,14 is RFR, CTS, TX, RX. On Wifi Vita units, you need to fill in the 88ohm termination resistors (or just short the pads).

UART Initialization

ScePervasiveForDriver_EFD084D8(uart_bus); // Turn on clock
ScePervasiveForDriver_A7CE7DCC(uart_bus); // Out of reset
ksceUartInit(uart_bus);
/*
 * Use UART bus
 * ...
 */
ScePervasiveForDriver_788B6C61(uart_bus); // Put to reset
ScePervasiveForDriver_18DD8043(uart_bus); // Turn off clock