HD6473032F Datasheet, PDF (140/572 Pages) Hitachi Semiconductor – Hitachi Microcomputer

Mode 1: Address output or generic input can be selected for each pin in port 1. A pin becomes an
address output pin if the corresponding P1DDR bit is set to 1, and a generic input pin if this bit is
cleared to 0. Following a reset, all pins are input pins. To use a pin for address output, its P1DDR
bit must be set to 1. Figure 7-2 shows the pin functions in mode 1.
When P1DDR = 1 When P1DDR = 0
Port 1
A₇ (output)
A₆ (output)
A₅ (output)
A₄ (output)
A₃ (output)
A₂ (output)
A₁ (output)
A₀ (output)
P1₇ (input)
P1₆ (input)
P1₅ (input)
P1₄ (input)
P1₃ (input)
P1₂ (input)
P1₁ (input)
P1₀ (input)
Figure 7-2 Pin Functions in Mode 1 (Port 1)
Modes 2 and 3 (Single-Chip Modes): Input or output can be selected separately for each pin in
port 1. A pin becomes an output pin if the corresponding P1DDR bit is set to 1, and an input pin if
this bit is cleared to 0. Figure 7-3 shows the pin functions in modes 2 and 3.
Port 1
P1₇ (input/output)
P1₆ (input/output)
P1₅ (input/output)
P1₄ (input/output)
P1₃ (input/output)
P1₂ (input/output)
P1₁ (input/output)
P1₀ (input/output)
Figure 7-3 Pin Functions in Modes 2 and 3 (Port 1)
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