HD643303x Hitachi, HD643303x Datasheet - Page 148
HD643303x
Manufacturer Part Number
HD643303x
Description
Hitachi Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD643303X.pdf
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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.
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.
Figure 7-9 Pin Functions in Modes 2 and 3 (Port 3)
Figure 7-8 Pin Functions in Mode 1 (Port 3)
Port 3
Port 3
133
D
D
D
D
D
D
D
D
P3 (input/output)
P3 (input/output)
P3 (input/output)
P3 (input/output)
P3 (input/output)
P3 (input/output)
P3 (input/output)
P3 (input/output)
7
6
5
4
3
2
1
0
(input/output)
(input/output)
(input/output)
(input/output)
(input/output)
(input/output)
(input/output)
(input/output)
7
6
5
4
3
2
1
0
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