HD6473032F Datasheet, PDF (144/572 Pages) Hitachi Semiconductor – Hitachi Microcomputer

Mode 1: Address output or generic input can be selected for each pin in port 2. A pin becomes an
address output pin if the corresponding P2DDR 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 P2DDR
bit must be set to 1. Figure 7-5 shows the pin functions in mode 1.
When P2DDR = 1
When P2DDR = 0
Port 2
A₁₅ (output)
A₁₄ (output)
A₁₃ (output)
A₁₂ (output)
A₁₁ (output)
A₁₀ (output)
A₉ (output)
A₈ (output)
P2₇ (input)
P2₆ (input)
P2₅ (input)
P2₄ (input)
P2₃ (input)
P2₂ (input)
P2₁ (input)
P2₀ (input)
Figure 7-5 Pin Functions in Mode 1 (Port 2)
Modes 2 and 3: Input or output can be selected separately for each pin in port 2. A pin becomes an
output pin if the corresponding P2DDR bit is set to 1, and an input pin if this bit is cleared to 0.
Figure 7-6 shows the pin functions in modes 2 and 3.
Port 2
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 7-6 Pin Functions in Modes 2 and 3 (Port 2)
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