HD6473032F Datasheet, PDF (141/572 Pages) Hitachi Semiconductor – Hitachi Microcomputer

7.3 Port 2
7.3.1 Overview
Port 2 is an 8-bit input/output port with the pin configuration shown in figure 7-4.
The pin functions differ depending on the operating mode. In mode 1, settings in the port 1 data
direction register (P1DDR) can designate pins for address bus output (A₁₅ to A₈) or generic input.
In modes 2 and 3, port 2 is a generic input/output port.
Port 2 has software-programmable built-in pull-up transistors. Pins in port 2 can drive one TTL
load and a 90-pF capacitive load. They can also drive a darlington transistor pair.
Port 2
Port 2 pins
P2₇ /A₁₅
P2₆ /A₁₄
P2₅ /A₁₃
P2₄ /A₁₂
P2₃ /A₁₁
P2₂ /A₁₀
P2₁ /A₉
P2₀ /A₈
Mode 1
P2₇ (input)/A₁₅ (output)
P2₆ (input)/A₁₄ (output)
P2₅ (input)/A₁₃ (output)
P2₄ (input)/A₁₂ (output)
P2₃ (input)/A₁₁ (output)
P2₂ (input)/A₁₀ (output)
P2₁ (input)/A₉ (output)
P2₀ (input)/A₈ (output)
Modes 2 and 3
P2₇ (input/output)
P2₆ (input/output)
P2₅ (input/output)
P2₄ (input/output)
P2₃ (input/output)
P2₂ (input/output)
P2₁ (input/output)
P2₀ (input/output)
Figure 7-4 Port 2 Pin Configuration
126