H8SLASH3003 datasheet(263/715 Pages) RENESAS

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9.3 Port 5

9.3.1 Overview

Port 5 is a 4-bit input/output port with the pin configuration shown in figure 9-4. The pin functions

differ depending on the operating mode.

In modes 1 and 2, port 5 is a generic input/output port. In modes 3 and 4, port 5 is used for address

output.

Port 5 has software-programmable built-in pull-up transistors.

Pins in port 5 can drive one TTL load and a 90-pF capacitive load. They can also drive an LED or

a darlington transistor pair.

Figure 9-4 Port 5 Pin Configuration

9.3.2 Register Descriptions

Table 9-4 summarizes the registers of port 5.

Table 9-4 Port 5 Registers

Initial Value

Address*

Name

Abbreviation

R/W

Mode 1/2

Mode 3/4

H'FFC8

Port 5 data direction register

P5DDR

H'0F

H'FF

H'FFCA

Port 5 data register

P5DR

R/W

H'00

H'FFDB

Port 5 input pull-up control register

P5PCR

R/W

H'00

Note: * Lower 16 bits of the address.

Port 5

P5 /A

P5 (input/output)

(output)

Port 5 pins

Modes 1 and 2

Modes 3 and 4

245

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