UART

The QS standard defines three independent UART Ports (UART_A – UART_C). UART_A is used to output serial debugging information. UART_C supports hardware RTS/CTS handshake.

Pin	Signal	Description	type	I/O
89	UART_RXD_A	Receive Data input signal	3V3	I
90	UART_TXD_A	Transmit Data output signal	3V3	O
91	UART_RXD_B	Receive Data input signal	3V3	I
92	UART_TXD_B	Transmit Data output signal	3V3	O
93	UART_RXD_C	Receive Data input signal	3V3	I
94	UART_TXD_C	Transmit Data output signal	3V3	O
95	UART_CTS_C	Clear to Send input signal	3V3	I
96	UART_RTS_C	Request to Send output signal	3V3	O

Note

Keep attention to the unusual DCE naming convention NXP is using for CTS(output)/RTS(input).

QS Standard Contact Group Index

Pins	Function	Pins	Function	Pins	Function	Pins	Function
1-4	SPI	5-10	I2C	11-14	CAN	15-18	SAI
19-35	Ethernet	36-42	SD Interface	43-48	USB	49-52	Power Supply, Reset and Boot mode
53-76	18-bit RGB Display Interface	77-78	Backlight and Display Control	53-72	Camera	79-88	MIPI DSI Display
89-96	UART	97-100	SPI	1A,75A,76A,100A	PCIe	25A,26A,50A,51A	USB3 Super Speed