HD6413003RF Datasheet, PDF (263/715 Pages) Renesas Technology Corp – Microcontroller (MCU)

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.
Port 5
Port 5 pins Modes 1 and 2
P5₇ /A₂₃
P5₆ /A₂₂
P5₅ /A₂₁
P5₄ /A₂₀
P5₇ (input/output)
P5₆ (input/output)
P5₅ (input/output)
P5₄ (input/output)
Modes 3 and 4
A ₂₃ (output)
A ₂₂ (output)
A ₂₁ (output)
A ₂₀ (output)
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
Address* Name
Abbreviation R/W
H'FFC8 Port 5 data direction register
P5DDR
W
H'FFCA Port 5 data register
P5DR
R/W
H'FFDB Port 5 input pull-up control register P5PCR
R/W
Note: * Lower 16 bits of the address.
Initial Value
Mode 1/2 Mode 3/4
H'0F
H'FF
H'00
H'00
245