RA4T1 datasheet(10/89 Pages) RENESAS

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Table 1.15

Pin functions (2 of 3)

Function

Signal

I/O

Description

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

Analog power supply

AVCC0

Input

Analog voltage supply pin. This is used as the analog power supply

for the respective modules. Supply this pin with the same voltage as

the VCC pin.

AVSS0

Input

Analog ground pin. This is used as the analog ground for the

respective modules. Supply this pin with the same voltage as the

VSS pin.

VREFH

Input

Analog reference voltage supply pin for the D/A Converter.

VREFL

Input

Analog reference ground pin for the D/A Converter.

VREFH0

Input

Analog reference voltage supply pin for the ADC12. Connect this pin

to AVCC0 when not using the ADC12.

VREFL0

Input

Analog reference ground pin for the ADC12. Connect this pin to

AVSS0 when not using the ADC12.

ADC12

AN0n

Input

Input pins for the analog signals to be processed by the A/D

converter (n: pin number).

ADTRG0

Input

Input pins for the external trigger signals that start the A/D

conversion, active-low.

PGAVSS000

Input

Pseudo-differential input pins

DAC12

DAn

Output

Output pins for the analog signals processed by the D/A converter.

RA4T1 Datasheet

1. Overview

R01DS0415EJ0140 Rev.1.40

May 29, 2026

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