R8CSLASH2G datasheet(27/344 Pages) RENESAS

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R8C/2G Group

1. Overview

Rev.1.00

Apr 04, 2008

Page 7 of 318

REJ09B0387-0100

1.5

Pin Functions

Table 1.4 lists Pin Functions.

I: Input

O: Output

I/O: Input and output

NOTE:

1. Refer to the oscillator manufacturer for oscillation characteristics.

Table 1.4

Pin Functions

Type

Symbol

I/O Type

Description

Power supply input VCC, VSS

–

Apply 2.2 V to 5.5 V to the VCC pin. Apply 0 V to the VSS pin.

Reset input

RESET

Input “L” on this pin resets the MCU.

MODE

Connect this pin to VCC via a resistor.

XCIN clock input

XCIN

These pins are provided for XCIN clock generation circuit I/O.

Connect a crystal oscillator between the XCIN and XCOUT

pins.(1) To use an external clock, input it to the XCIN pin and

leave the XCOUT pin open.

XCIN clock output

XCOUT

INT interrupt input

INT0 to INT2, INT4

IINT interrupt input pins

Key input interrupt

KI0 to KI3

Key input interrupt input pins

Timer RA

TRAIO

I/O

Timer RA I/O pin

TRAO

Timer RA output pin

Timer RB

TRBO

Timer RB output pin

Timer RE

TREO

Divided clock output pin

Timer RF

TRFI

Timer RF input pin

TRFO00 to TRFO02,

TRFO10 to TRFO12

Timer RF output pins

Serial interface

CLK0, CLK2

I/O

Clock I/O pin

RXD0, RXD2

Serial data input pin

TXD0, TXD2

Serial data output pin

Comparator

VCMP1, VCMP2

Analog input pins to comparator

CVREF

Reference voltage input pin to comparator

VCOUT1, VCOUT2

Comparator output pins

I/O port

P0_4 to P0_7,

P1_0 to P1_7,

P3_0 to P3_7,

P4_3, P4_5,

P6_0, P6_3 to P6_6

I/O

CMOS I/O ports. Each port has an I/O select direction

or output individually.

Any port set to input can be set to use a pull-up resistor or not

by a program.

Output port

P4_4

Output-only port

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