R5F21246SDFP-V2 View Datasheet(PDF) - Renesas Electronics

Part Name

Description

Manufacturer

R5F21246SDFP-V2

SINGLE-CHIP 16-BIT CMOS MCU

Renesas Electronics 

R8C/24 Group, R8C/25 Group

1. Overview

1.6 Pin Functions

Table 1.5 lists Pin Functions.

Table 1.5 Pin Functions

Type

Power supply input

Analog power

supply input

Reset input

MODE

XIN clock input

Symbol

VCC, VSS

AVCC, AVSS

RESET

MODE

XIN

XIN clock output XOUT

I/O Type

Description

I Apply 2.2 V 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

O the XIN and XOUT pins. To use an external clock, input it to

the XIN pin and leave the XOUT pin open.

XCIN clock input XCIN

XCIN clock output 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 to INT3

I INT interrupt input pins.

INT0 is timer RD input pin. INT1 is timer RA input pin.

Key input interrupt KI0 to KI3

I Key input interrupt input pins

Timer RA

TRAIO

I/O Timer RA I/O pin

Timer RB

TRAO

TRBO

O Timer RA output pin

O Timer RB output pin

Timer RD

TRDIOA0, TRDIOA1, I/O Timer RD I/O ports

TRDIOB0, TRDIOB1,

TRDIOC0, TRDIOC1,

TRDIOD0, TRDIOD1

TRDCLK

I External clock input pin

Timer RE

TREO

O Divided clock output pin

Serial interface

CLK0, CLK1

I/O Transfer clock I/O pin

RXD0, RXD1

I Serial data input pins

TXD0, TXD1

O Serial data output pins

I2C bus interface SCL

I/O Clock I/O pin

Clock synchronous

serial I/O with chip

select

SDA

SSI

SCS

SSCK

I/O Data I/O pin

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,

P2_0 to P2_7,

P3_0, P3_1,

P3_3 to P3_5, P3_7,

P4_3 to P4_5,

P6_0 to P6_7

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.

P2_0 to P2_7 also function as LED drive ports.

Input port

P4_2, P4_6, P4_7

I Input-only ports

I: Input

O: Output

I/O: Input and output

Rev.3.00 Feb 29, 2008 Page 11 of 51

REJ03B0117-0300

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