R5F2M121ANDD datasheet(10/48 Pages) RENESAS

10 / 48 page

R8C/M11A Group, R8C/M12A Group

1. Overview

Under development Preliminary document

Specifications in this document are tentative and subject to change.

R01DS0010EJ0010 Rev.0.10

Page 10 of 45

Aug 25, 2010

1.5

Pin Functions

Table 1.7 lists the Pin Functions.

Note:

1. Contact the oscillator manufacturer for oscillation characteristics.

Table 1.7

Pin Functions

Item

Pin Name

I/O

Description

Power supply input VCC, VSS

—

Apply 1.8 V through 5.5 V to the VCC pin.

Apply 0 V to the VSS pin.

Analog power

supply input

AVCC, AVSS

—

Power supply input for the A/D converter.

Connect a capacitor between pins AVCC and AVSS.

Reset input

RESET

Applying a low level to this pin resets the MCU.

MODE

Connect this pin to the VCC pin via a resistor.

XIN clock input

XIN

I/O for the XIN clock generation circuit.

Connect a ceramic resonator or a crystal oscillator between

pins XIN and XOUT. (1)

To use an external clock, input it to the XIN pin and leave the

XOUT pin open.

XIN clock output

XOUT

INT interrupt input

INT0 to INT3

INT interrupt input.

Key input interrupt

KI0 to KI3

Key input interrupt input.

I/O ports

P1_0 to P1_7,

P3_0 to P3_5, P3_7,

P4_2, P4_5 to P4_7,

PA_0

I/O

CMOS I/O ports.

Each port has an I/O select direction register, enabling

switching input and output for each port.

For input ports other than PA_0, the presence or absence of a

pull-up resistor can be selected by a program.

P1_2 to P1_5, P3_3 to P3_5, and P3_7 can be used as LED

drive ports.

Timer RJ2

TRJIO

I/O

Timer RJ2 I/O.

TRJO

Pulse output.

Timer RB2

TRBO

Timer RB2 output.

Timer RC

TRCCLK

External clock input.

TRCTRG

External trigger input.

TRCIOA, TRCIOB,

TRCIOC, TRCIOD

I/O

Timer RC I/O.

Serial interface

CLK0

I/O

Transfer clock I/O.

RXD0

Serial data input.

TXD0

Serial data output.

A/D converter

AN0 to AN4, AN7

Analog input for the A/D converter.

ADTRG

External trigger input for the A/D converter.

Comparator B

IVCMP1, IVCMP3

Analog voltage input for comparator B.

IVREF1, IVREF3

Reference voltage input for comparator B.

VCOUT1, VCOUT3

Comparison result output for comparator B.

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