H838532H datasheet(189/508 Pages) RENESAS

부품명	H838532H

상세설명	16-Bit Single-Chip Microcomputer H8 Family / H8/300H Super Low Power Series

PDF	508 Pages

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제조업체	RENESAS [Renesas Technology Corp]

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Section 8 I/O Ports

Rev. 1.00 May 30, 2008 Page 169 of 484

REJ09B0436-0100

8.3

Port 3

8.3.1

Overview

Port 3 is a 8-bit I/O port, configured as shown in figure 8.2.

In the flash memory version, the on-chip pull-up MOS for pin P3

2 is on during the reset period. It

turns off and normal operation resumes after the reset is cleared. This should be considered when

making connections to external circuitry. Note that in the mask ROM version P3

2 continues to

operate normally.

P3 /AEVL

P3 /AEVH

P3 /TXD

Port 3

P3 /RXD

P3 /SCK

P3 /UD/EXCL

P3 /PWM

Figure 8.2 Port 3 Pin Configuration

8.3.2

Table 8.5 shows the port 3 register configuration.

Table 8.5

Port 3 Registers

Name

Abbr.

R/W

Initial Value

Address

Port data register 3

PDR3

R/W

H'00

H'FFD6

Port control register 3

PCR3

H'00

H'FFE6

Port pull-up control register 3

PUCR3

R/W

H'00

H'FFE1

Port mode register 2

PMR2

R/W

H'58

H'FFC9

Port mode register 3

PMR3

R/W

H'04

H'FFCA

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