R8C datasheet(25/106 Pages) RENESAS

25 / 106 page

R01DS0011EJ0100 Rev.1.00

Page 25 of 102

Dec 21, 2010

R8C/LA3A Group, R8C/LA5A Group, R8C/LA6A Group, R8C/LA8A Group

1. Overview

1.5

Pin Functions

Tables 1.18 and 1.19 list Pin Functions for R8C/LA5A Group, and Tables 1.20 and 1.21 list Pin Functions for R8C/

LA8A Group.

I: Input

O: Output

I/O: Input and output

Note:

1. Contact the oscillator manufacturer for oscillation characteristics.

Table 1.18

Pin Functions for R8C/LA5A Group (1)

Item

Pin Name

I/O Type

Description

Power supply input VCC, VSS

—

Apply 1.8 V to 5.5 V to the VCC pin.

Apply 0 V to the VSS pin.

Analog power

supply input

AVCC, AVSS

—

Power supply for the A/D converter.

Connect a capacitor between AVCC and AVSS.

Reset input

RESET

Driving this pin low resets the MCU.

MODE

Connect this pin to VCC via a resistor.

Power-off 0 mode

exit input

WKUP0

This pin is provided for input to exit the mode used in power-off

0 mode. Connect to VSS when not using power-off 0 mode.

WKUP1

This pin is provided for input to exit the mode used in power-off

0 mode.

XIN clock input

XIN

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

Connect a ceramic oscillator or a crystal oscillator between pins

XIN and XOUT. (1) To use an external clock, input it to the XIN

pin and set XOUT as the I/O port P9_1. When the pin is not

used, treat it as an unassigned pin and use the appropriate

handling.

XIN clock output

XOUT

XCIN clock input

XCIN

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

Connect a crystal oscillator between pins XCIN and XCOUT. (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 INT3,

INT5, INT7

IINT interrupt input pins.

Key input interrupt

KI0 to KI7

Key input interrupt input pins

Timer RB

TRB0O, TRB1O

Timer RB output pin

Timer RC

TRCCLK

External clock input pin

TRCTRG

External trigger input pin

TRCIOA, TRCIOB,

TRCIOC, TRCIOD

I/O

Timer RC I/O pins

Timer RH

TRHO

Timer RH output pin

Timer RJ

TRJ0IO, TRJ1IO

I/O

Timer RJ I/O pins

Serial interface

CLK0

I/O

Transfer clock I/O pins

RXD0

Serial data input pins

TXD0

Serial data output pins

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