HD64F3039F18 Datasheet, PDF (176/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 7 I/O Ports
7.5 Port 5
7.5.1 Overview
Port 5 is a 4-bit input/output port with the pin configuration shown in figure 7.12. The pin
functions differ depending on the operating mode.
In modes 1, 3 (expanded modes with on-chip ROM disabled), port 5 consists of address output
pins (A19 to A16). In modes 5 (expanded modes with on-chip ROM enabled), settings in the port
5 data direction register (P5DDR) designate pins for address bus output (A₁₉ to A₁₆) or generic
input. In mode 6 and 7 (single-chip mode), port 5 is a generic input/output port.
Port 5 has software-programmable built-in pull-up transistors. 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
P5₃ /A₁₉
P5₂ /A₁₈
P5₁ /A₁₇
P5₀ /A₁₆
Modes 1, 3
A₁₉ (output)
A₁₈ (output)
A₁₇ (output)
A₁₆ (output)
Mode 5
Modes 6 and 7
P5₃ (input)/A₁₉ (output)
P5₂ (input)/A₁₈ (output)
P5₁ (input)/A₁₇ (output)
P5₀ (input)/A₁₆ (output)
P5₃ (input/output)
P5₂ (input/output)
P5₁ (input/output)
P5₀ (input/output)
Figure 7.12 Port 5 Pin Configuration
Rev.3.00 Mar. 26, 2007 Page 152 of 682
REJ09B0353-0300