H838532H datasheet(179/508 Pages) RENESAS

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Section 8 I/O Ports

Rev. 1.00 May 30, 2008 Page 159 of 484

REJ09B0436-0100

Section 8 I/O Ports

8.1

Overview

The LSI is provided with six 8-bit I/O ports, one 4-bit I/O port, one 3-bit I/O port, one 8-bit input-

only port, and one 1-bit input-only port. Table 8.1 indicates the functions of each port.

Each port has of a port control register (PCR) that controls input and output, and a port data

See section 2.8.3, Bit-Manipulation Instruction, for information on executing bit-manipulation

instructions to write data in PCR or PDR.

Ports 5, 6, 7, 8, and A are also used as liquid crystal display segment and common pins, selectable

in 8-bit units.

Block diagrams of each port are given in Appendix B, I/O Port Block Diagrams.

Table 8.1

Port Functions

Port

Description

Pins

Other Functions

Function

Switching

Registers

Port 1

• 8-bit I/O port

• MOS input pull-up

option

7 to P15/

IRQ

3 to IRQ1/

TMIF, TMIC

External interrupts 3 to 1

Timer event interrupts

TMIF, TMIC

PMR1

TCRF,

TMC

4/IRQ4/ADTRG

External interrupt 4 and A/D

converter external trigger

PMR1, AMR

3/TMIG

Timer G input capture input

PMR1

2, P11/

TMOFH, TMOFL

Timer F output compare

output

PMR1

0/TMOW

Timer A clock output

PMR1

7/AEVL

6/AEVH

5/TXD31

4/RXD31

3/SCK31

SCI31 data output (TXD

31),

data input (RXD

31), clock

input/output (SCK

31), and

asynchronous counter event

inputs AEVL, AEVH

PMR3

SCR31

SMR31

Port 3

• 8-bit I/O port

• MOS input pull-up

option

• Large-current port

1/UD/EXCL

0/PWM

Timer C count-up/down select

input, 14-bit PWM output, and

external subclock input

PMR2

PMR3

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