R5F21275SDFP datasheet(10/73 Pages) RENESAS

Part #	R5F21275SDFP

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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10 / 73 page

R8C/26 Group, R8C/27 Group

1. Overview

Rev.2.10

Sep 26, 2008

Page 10 of 69

REJ03B0168-0210

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 to 5.5 V (J, K version are 2.7 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

(N, D version)

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

(N, D version)

XCOUT

O

INT interrupt input

INT0, INT1, INT3

IINT interrupt input pins

Key input interrupt

KI0 to KI3

I

Key input interrupt input pins

Timer RA

TRAO

O

Timer RA output pin

TRAIO

I/O

Timer RA I/O pin

Timer RB

TRBO

O

Timer RB output pin

Timer RC

TRCCLK

I

External clock input pin

TRCTRG

I

External trigger input pin

TRCIOA, TRCIOB,

TRCIOC, TRCIOD

I/O

Sharing output-compare output / input-capture input / PWM /

PWM2 output pins

Timer RE

TREO

O

Timer RE output pin

Serial interface

CLK0, CLK1

I/O

Clock I/O pin

RXD0, RXD1

I

Receive data input pin

TXD0, TXD1

O

Transmit data output pin

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,

P3_1, P3_3 to

P3_7,

P4_5,

P5_3, P5_4

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.

P1_0 to P1_7 also function as LED drive ports (N, D version).

Input port

P4_2, P4_6, P4_7

I

Input-only ports

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