R8C datasheet(28/106 Pages) RENESAS

28 / 106 page

R01DS0011EJ0100 Rev.1.00

Page 28 of 102

Dec 21, 2010

R8C/LA3A Group, R8C/LA5A Group, R8C/LA6A Group, R8C/LA8A Group

1. Overview

I: Input

O: Output

I/O: Input and output

Note:

1. Contact the oscillator manufacturer for oscillation characteristics.

Table 1.21

Pin Functions for R8C/LA8A Group (2)

Item

Pin Name

I/O Type

Description

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

Reference voltage

input

VREF

Reference voltage input pin for the A/D converter

A/D converter

AN0 to AN11

A/D converter analog input pins

ADTRG

AD external trigger input pin

Comparator B

IVCMP1, IVCMP3

Comparator B analog voltage input pins

IVREF1, IVREF3

Comparator B reference voltage input pins

I/O ports

P0_0 to P0_7,

P1_0 to P1_7,

P2_0 to P2_7,

P3_0 to P3_7,

P4_0 to P4_7,

P5_0 to P5_6,

P6_0 to P6_7

P7_0 to P7_6,

P8_0 to P8_7,

P9_0, P9_1

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.

Ports P7_0, P7_1 and P8 can be used as LED drive ports.

Segment output

SEG0 to SEG39

LCD segment output pins

Common output

COM0 to COM3,

COMEXP

LCD common output pins

LCD power supply

VL1

Apply the following voltage: 1 V

≤ VL1 ≤ VCC and VL1 ≤ VL2.

VL2

Apply the following voltage: VL2

≤ 5.5 V and VL1 ≤ VL2 ≤ VL3.

VL3

Apply the following voltage: VL3

≤ 5.5 V and VL2 ≤ VL3.

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