R8C datasheet(12/60 Pages) RENESAS

12 / 60 page

R8C/38A Group

1. Overview

REJ03B0274-0120 Rev.1.20

Page 12 of 57

Jul 31, 2010

I: Input

O: Output

I/O: Input and output

Table 1.8

Pin Functions (2)

Item

Pin Name

I/O Type

Description

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.

I2C bus

SCL

I/O

Clock I/O pin

SDA

I/O

Data I/O pin

Reference voltage

input

VREF

Reference voltage input pin to A/D converter.

A/D converter

AN0 to AN19

Analog input pins to A/D converter.

ADTRG

AD external trigger input pin.

D/A converter

DA0, DA1

D/A converter output pins.

Comparator A

LVCMP1, LVCMP2

Comparator A analog voltage input pins.

LVREF

Comparator A reference voltage input pin.

LVCOUT1,

LVCOUT2

Comparator A output pins.

Comparator B

IVCMP1, IVCMP3

Comparator B analog voltage input pins.

IVREF1, IVREF3

Comparator B reference voltage input pins.

Voltage detection

circuit

LVCMP2

Detection voltage input pin for voltage detection 2.

I/O port

P0_0 to P0_7,

P1_0 to P1_7,

P2_0 to P2_7,

P3_0 to P3_7,

P4_3 to P4_7,

P5_0 to P5_7,

P6_0 to P6_7,

P7_0 to P7_7,

P8_0 to P8_7,

P9_0 to P9_5

I/O

CMOS I/O ports. Each port has an I/O select direction

or output individually.

Any port set to input can be set to use a pull-up resistor or not

by a program.

Input port

P4_2

Input-only ports.

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