HD6473032F Datasheet, PDF (148/572 Pages) Hitachi Semiconductor – Hitachi Microcomputer

7.4.3 Pin Functions in Each Mode
The pin functions of port 3 differ between modes 1 and modes 2 and 3. The pin functions in each
mode are described below.
Mode 1: All pins of port 3 automatically become data input/output pins. Figure 7-8 shows the pin
functions in mode 1.
Port 3
D₇ (input/output)
D₆ (input/output)
D₅ (input/output)
D₄ (input/output)
D₃ (input/output)
D₂ (input/output)
D₁ (input/output)
D₀ (input/output)
Figure 7-8 Pin Functions in Mode 1 (Port 3)
Modes 2 and 3: Input or output can be selected separately for each pin in port 3. A pin becomes an
output pin if the corresponding P3DDR bit is set to 1, and an input pin if this bit is cleared to 0.
Figure 7-9 shows the pin functions in modes 2 and 3.
Port 3
P3₇ (input/output)
P3₆ (input/output)
P3₅ (input/output)
P3₄ (input/output)
P3₃ (input/output)
P3₂ (input/output)
P3₁ (input/output)
P3₀ (input/output)
Figure 7-9 Pin Functions in Modes 2 and 3 (Port 3)
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