R5F21331MDFP datasheet(8/56 Pages) RENESAS

Part #	R5F21331MDFP

Description	Electronic household appliances, office equipment, audio equipment, consumer equipment

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Manufacturer	RENESAS [Renesas Technology Corp]

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R01DS0023EJ0020 Rev.0.20

Page 8 of 53

Feb 15, 2011

R8C/33M Group

1. Overview

Under development Preliminary document

Specifications in this document are tentative and subject to change.

1.5

Pin Functions

Tables 1.5 and 1.6 list Pin Functions.

I: Input

O: Output

I/O: Input and output

Note:

1. Refer to the oscillator manufacturer for oscillation characteristics.

Table 1.5

Pin Functions (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

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 (1). To use an external clock, input it

to the XOUT pin and leave the XIN pin open.

XIN clock output

XOUT

I/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 (1). 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, INT1, INT3

IINT interrupt input pins.

INT0 is timer RB, and RC 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 RC

TRCCLK

I

External clock input pin

TRCTRG

I

External trigger input pin

TRCIOA, TRCIOB,

TRCIOC, TRCIOD

I/O

Timer RC I/O pins

Timer RE

TREO

O

Divided clock output pin

Serial interface

CLK0, CLK1, CLK2

I/O

Transfer clock I/O pins

RXD0, RXD1, RXD2

I

Serial data input pins

TXD0, TXD1, TXD2

O

Serial data output pins

CTS2

I

Transmission control input pin

RTS2

O

Reception control output pin

SCL2

I/O

I2C mode clock I/O pin

SDA2

I/O

I2C mode data I/O pin

I2C bus

SCL

I/O

Clock I/O pin

SDA

I/O

Data I/O pin

SSU

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

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