HD6432351 datasheet(385/1025 Pages) RENESAS

385 / 1025 page

Section 9 I/O Ports

Rev. 3.00 Sep 15, 2006 page 351 of 988

REJ09B0330-0300

9.4

Port 3

9.4.1

Overview

Port 3 is a 6-bit I/O port. Port 3 pins also function as SCI I/O pins (TxD0, RxD0, SCK0, TxD1,

RxD1, and SCK1). Port 3 pin functions are the same in all operating modes.

Figure 9.3 shows the port 3 pin configuration.

P35

P34

P33

P32

P31

P30

(I/O)/

SCK1 (I/O)

SCK0 (I/O)

RxD1 (input)

RxD0 (input)

TxD1 (output)

TxD0 (output)

Port 3 pins

Port 3

Figure 9.3 Port 3 Pin Functions

9.4.2

Table 9.6 shows the port 3 register configuration.

Table 9.6

Port 3 Registers

Name

Abbreviation

R/W

Initial Value*

Address*

Port 3 data direction register

P3DDR

H'00

H'FEB2

Port 3 data register

P3DR

R/W

H'00

H'FF62

Port 3 register

PORT3

Undefined

H'FF52

Port 3 open drain control register

P3ODR

R/W

H'00

H'FF76

Notes: 1. Lower 16 bits of the address.

2. Value of bits 5 to 0.

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