R5F21248SDFP datasheet(11/59 Pages) RENESAS

Part #	R5F21248SDFP

Description	SINGLE-CHIP 16-BIT CMOS MCU

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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11 / 59 page

R8C/24 Group, R8C/25 Group

1. Overview

Rev.3.00

Feb 29, 2008

Page 11 of 51

REJ03B0117-0300

1.6

Pin Functions

Table 1.5 lists Pin Functions.

I: Input

O: Output

I/O: Input and output

Table 1.5

Pin Functions

Type

Symbol

I/O Type

Description

Power supply input

VCC, VSS

I

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

Analog power

supply input

AVCC, AVSS

I

Power supply for the A/D converter.

Connect a capacitor between AVCC and AVSS.

Reset input

RESET

I

Input “L” on this pin resets the MCU.

MODE

I

Connect this pin to VCC via a resistor.

XIN clock input

XIN

I

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

Connect a ceramic resonator or a crystal oscillator between

the XIN and XOUT pins. To use an external clock, input it to

the XIN pin and leave the XOUT pin open.

XIN clock output

XOUT

O

XCIN clock input

XCIN

I

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

Connect a crystal oscillator between the XCIN and XCOUT

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

leave the XCOUT pin open.

XCIN clock output

XCOUT

O

INT interrupt input

INT0 to INT3

I

INT interrupt input pins.

INT0 is timer RD input pin. INT1 is timer RA input pin.

Key input interrupt

KI0 to KI3

I

Key input interrupt input pins

Timer RA

TRAIO

I/O

Timer RA I/O pin

TRAO

O

Timer RA output pin

Timer RB

TRBO

O

Timer RB output pin

Timer RD

TRDIOA0, TRDIOA1,

TRDIOB0, TRDIOB1,

TRDIOC0, TRDIOC1,

TRDIOD0, TRDIOD1

I/O

Timer RD I/O ports

TRDCLK

I

External clock input pin

Timer RE

TREO

O

Divided clock output pin

Serial interface

CLK0, CLK1

I/O

Transfer clock I/O pin

RXD0, RXD1

I

Serial data input pins

TXD0, TXD1

O

Serial data output pins

I2C bus interface

SCL

I/O

Clock I/O pin

SDA

I/O

Data I/O pin

Clock synchronous

serial I/O with chip

select

SSI

I/O

Data I/O pin

SCS

I/O

Chip-select signal I/O pin

SSCK

I/O

Clock I/O pin

SSO

I/O

Data I/O pin

Reference voltage

input

VREF

I

Reference voltage input pin to A/D converter

A/D converter

AN0 to AN11

I

Analog input pins to A/D converter

I/O port

P0_0 to P0_7,

P1_0 to P1_7,

P2_0 to P2_7,

P3_0, P3_1,

P3_3 to P3_5, P3_7,

P4_3 to P4_5,

P6_0 to P6_7

I/O

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

register, allowing each pin in the port to be directed for input

or output individually.

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

by a program.

P2_0 to P2_7 also function as LED drive ports.

Input port

P4_2, P4_6, P4_7

I

Input-only ports

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