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