R5F21272SDFP 查看數據表（PDF） - Renesas Electronics

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R5F21272SDFP

SINGLE-CHIP 16-BIT CMOS MCU

Renesas Electronics 

R8C/26 Group, R8C/27 Group

1. Overview

1.6 Pin Functions

Table 1.5 lists Pin Functions.

Table 1.5 Pin Functions

Type

Symbol

Power supply input VCC, VSS

Analog power

supply input

Reset input

MODE

XIN clock input

AVCC, AVSS

RESET

MODE

XIN

XIN clock output XOUT

I/O Type

Description

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.

I Power supply for the A/D converter.

Connect a capacitor between AVCC and AVSS.

I

Input “L” on this pin resets the MCU.

I Connect this pin to VCC via a resistor.

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

O XIN pin and leave the XOUT pin open.

XCIN clock input

(N, D version)

XCIN clock output

(N, D version)

XCIN

XCOUT

I

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

Connect a crystal oscillator between the XCIN and XCOUT

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

leave the XCOUT pin open.

INT interrupt input INT0, INT1, INT3

I

INT 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 SSI

serial I/O with chip SCS

select

SSCK

I/O Data I/O pin

I/O Chip-select signal I/O pin

I/O Clock I/O pin

SSO

I/O Data I/O pin

Reference voltage VREF

input

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

I: Input

O: Output

I/O: Input and output

Rev.2.10 Sep 26, 2008 Page 10 of 69

REJ03B0168-0210

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