33H datasheet(11/54 Pages) RENESAS

11 / 54 page

R8C/33G Group, R8C/33H Group

1. Overview

Under development Preliminary document

Specifications in this document are tentative and subject to change.

REJ03B0306-0010 Rev.0.10

Page 11 of 51

Jul. 21, 2010

1.5

Pin Functions

Tables 1.8 and 1.9 list Pin Functions.

I: Input

O: Output

I/O: Input and output

Note:

1. Refer to the oscillator manufacturer for oscillation characteristics.

Table 1.8

Pin Functions (1)

Item

Pin Name

I/O Type

Description

Power supply input

VCC, VSS

−

Apply 2.7 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

Input “L” on this pin resets the MCU.

MODE

Connect this pin to VCC via a resistor.

XIN clock input

XIN

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

INT interrupt input

INT0 to INT1, INT3

IINT interrupt input pins.

INT0 is timer RB, RC and RD input pin.

Key input interrupt

KI0 to KI3

Key input interrupt input pins

Timer RA

TRAIO

I/O

Timer RA I/O pin

TRAO

Timer RA output pin

Timer RB

TRBO

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 RD

TRDIOA0, TRDIOA1,

TRDIOB0, TRDIOB1,

TRDIOC0, TRDIOC1,

TRDIOD0, TRDIOD1

I/O

Timer RD I/O pins

TRDCLK

External clock input pin

Serial interface

CLK0, CLK2

I/O

Transfer clock I/O pins

RXD0, RXD2

Serial data input pins

TXD0, TXD2

Serial data output pins

CTS2

Transmission control input pin

RTS2

Reception control output pin

SCL2

I/O

I2C mode clock I/O pin

SDA2

I/O

I2C mode 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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