RX72N datasheet(18/179 Pages) RENESAS

18 / 179 page

RX72N Group

1. Overview

R01DS0343EJ0120 Rev.1.20

Page 18 of 179

Nov 15, 2023

1.4

Pin Functions

Table 1.4 lists the pin functions.

Table 1.4

Pin Functions (1/8)

Classifications

Pin Name

I/O

Description

Digital power supply

VCC

Input

Power supply pin. Connect this pin to the system power supply.

Connect the pin to VSS via a 0.1-µF multilayer ceramic

capacitor. The capacitor should be placed close to the pin.

VCL

Input

Connect this pin to VSS via a 0.22-µF multilayer ceramic

capacitor. The capacitor should be placed close to the pin.

VSS

Input

Ground pin. Connect it to the system power supply (0 V).

VBATT

Input

Backup power pin

Clock

XTAL

Output

Input/output pins for a crystal resonator. An external clock signal

can be input through the EXTAL pin.

EXTAL

Input

BCLK

Output

Outputs the external bus clock for external devices.

SDCLK

Output

Outputs the SDRAM-dedicated clock.

XCOUT

Output

Input/output pins for the sub-clock oscillator. Connect a crystal

resonator between XCOUT and XCIN.

XCIN

Input

CLKOUT

Output

Clock output pin.

Clock frequency accuracy

measurement

CACREF

Input

Reference clock input pin for the clock frequency accuracy

measurement circuit

Operating mode control

Input

Input pin for setting the operating mode. The signal level on this

pin must not be changed during operation.

Input

USB boot mode enable pin

UPSEL

Input

Selects the power supply method in USB boot mode.

The low level selects self-power mode and the high level selects

bus power mode.

System control

RES#

Input

Reset signal input pin. This MCU enters the reset state when

this signal goes low.

EMLE

Input

Input pin for the on-chip emulator enable signal. When the on-

chip emulator is used, this pin should be driven high. When not

used, it should be driven low.

BSCANP

Input

Boundary scan enable pin. Boundary scan is enabled when this

pin goes high. When not used, it should be driven low.

On-chip emulator

FINED

I/O

FINE interface pin

TRST#

Input

On-chip emulator or boundary scan pins. When the EMLE pin is

driven high, these pins are dedicated for the on-chip emulator.

TMS

Input

TDI

Input

TCK

Input

TDO

Output

TRCLK

Output

This pin outputs the clock for synchronization with the trace

data.

TRSYNC, TRSYNC1

Output

These pins indicate that output from the TRDATA0 to TRDATA7

pins is valid.

TRDATA0 to TRDATA7

Output

These pins output the trace information.

Address bus

A0 to A23

Output

Output pins for the address

Data bus

D0 to D31

I/O

Input and output pins for the bidirectional data bus

Multiplexed bus

A0/D0 to A15/D15

I/O

Address/data multiplexed bus

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