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H8/3021 Datasheet(PDF) 169 Page - Renesas Technology Corp

Part # H8/3021
Description  16-Bit Single-Chip Microcomputer
PDF  712 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8/3021 Datasheet(HTML) 169 Page - Renesas Technology Corp

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7. I/O Ports
Rev.2.00 Mar. 22, 2007 Page 145 of 684
REJ09B0352-0200
7.4.3
Pin Functions in Each Mode
The pin functions of port 3 differ between modes 1, 3, 5, and 6 and mode 7. The pin functions in
each mode are described below.
Modes 1, 3, 5, and 6: All pins of port 3 automatically become data input/output pins. Figure 7.10
shows the pin functions in modes 1, 3, 5, and 6.
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 7.10 Pin Functions in Modes 1, 3, 5, and 6 (Port 3)
Mode 7: 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
7.11 shows the pin functions in mode 7.
Port 3
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
Figure 7.11 Pin Functions in Mode 7 (Port 3)



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