152 datasheet(12/135 Pages) RENESAS

12 / 135 page

REJ03B0231-0110

Rev.1.10

Page 12 of 130

Sep 06, 2010

R32C/152 Group

1. Overview

1.5

Pin Definitions and Functions

Table 1.8 to Table 1.10 show the pin definitions and functions.

Table 1.8

Pin Definitions and Functions (1/3)

Function

Symbol

I/O

Description

Power supply

VCC, VSS

Applicable as follows: VCC = 3.0 to 5.5 V, VSS = 0 V

Analog power

supply

AVCC, AVSS

Power supply for the A/D converter. AVCC and AVSS

should be connected to VCC and VSS, respectively

Connecting pins

for decoupling

capacitor

VDC0, VDC1

—

A decoupling capacitor for internal voltage should be

connected between VDC0 and VDC1

Reset input

RESET

The MCU is reset when this pin is driven low

CNVSS

This pin should be connected to VSS via a resistor

Debug port

NSD

I/O

This pin is to communicate with a debugger. It should be

connected to VCC via a resistor of 1 to 4.7 k

Main clock input

XIN

Input/output for the main clock oscillator. A crystal, or a

ceramic resonator should be connected between pins

XIN and XOUT. An external clock should be input at the

XIN while leaving the XOUT open

Main clock output XOUT

Sub clock input

XCIN

Input/output for the sub clock oscillator. A crystal

oscillator should be connected between pins XCIN and

XCOUT. An external clock should be input at the XCIN

while leaving the XCOUT open

Sub clock output XCOUT

Clock output

CLKOUT

Output of the clock with the same frequency as low

speed clocks, f8, or f32

External interrupt

input

INT0 to INT8

Input for external interrupts

NMI input

P8_5/

NMI

Input for NMI

Key input interrupt

KI0 to KI3

Input for the key input interrupt

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