RA4E2 datasheet(10/91 Pages) RENESAS

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Table 1.14

Pin functions (2 of 3)

Function

Signal

I/O

Description

RTC

RTCOUT

Output

Output pin for 1-Hz or 64-Hz clock

RTCICn

Input

Time capture event input pins

SCI

SCKn

I/O

Input/output pins for the clock (clock synchronous mode)

RXDn

Input

Input pins for received data (asynchronous mode/clock synchronous

mode)

TXDn

Output

Output pins for transmitted data (asynchronous mode/clock

synchronous mode)

CTSn_RTSn

I/O

Input/output pins for controlling the start of transmission and

reception (asynchronous mode/clock synchronous mode), active-

low.

CTSn

Input

Input for the start of transmission.

SCLn

I/O

Input/output pins for the IIC clock (simple IIC mode)

SDAn

I/O

Input/output pins for the IIC data (simple IIC mode)

SCKn

I/O

Input/output pins for the clock (simple SPI mode)

MISOn

I/O

Input/output pins for slave transmission of data (simple SPI mode)

MOSIn

I/O

Input/output pins for master transmission of data (simple SPI mode)

SSn

Input

Chip-select input pins (simple SPI mode), active-low

I3C

I3C_SCL

I/O

Input/output pins for the I3C clock

I3C_SDA

I/O

Input/output pins for the I3C data

SCL0

I/O

Input/output pins for the I2C clock

SDA0

I/O

Input/output pins for the I2C data

SPI

RSPCKA, RSPCKB

I/O

Clock input/output pin

MOSIA, MOSIB

I/O

Input or output pins for data output from the master

MISOA, MISOB

I/O

Input or output pins for data output from the slave

SSLA0, SSLB0

I/O

Input or output pin for slave selection

SSLA1 to SSLA3, SSLB1

to SSLB3

Output

Output pins for slave selection

CANFD

CRX0

Input

Receive data

CTX0

Output

Transmit data

USBFS

VCC_USB

Input

Power supply pin

VSS_USB

Input

Ground pin

USB_DP

I/O

D+ pin of the USB on-chip transceiver. Connect this pin to the D+

pin of the USB bus.

USB_DM

I/O

D- pin of the USB on-chip transceiver. Connect this pin to the D- pin

of the USB bus.

USB_VBUS

Input

USB cable connection monitor pin. Connect this pin to VBUS of the

USB bus. The VBUS pin status (connected or disconnected) can be

detected when the USB module is operating as a function controller.

SSIE

SSIBCK0

I/O

SSIE serial bit clock pins

SSILRCK0/SSIFS0

I/O

LR clock/frame synchronization pins

SSITXD0

Output

Serial data output pin

SSIRXD0

Input

Serial data input pin

SSIDATA0

I/O

Serial data input/output pins

AUDIO_CLK

Input

External clock pin for audio (input oversampling clock)

CEC

CECIO

I/O

CEC data communication

RA4E2 Datasheet

1. Overview

R01DS0413EJ0150 Rev.1.50

May 29, 2026

Page 10 of 91

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