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H8/3021 Folha de dados(PDF) 173 Page - Renesas Technology Corp

Nome de Peças H8/3021
Descrição Electrónicos  16-Bit Single-Chip Microcomputer
PDF  712 Pages
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Fabricante Electrônico  RENESAS [Renesas Technology Corp]
Página de início  http://www.renesas.com
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H8/3021 Folha de dados(HTML) 173 Page - Renesas Technology Corp

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7. I/O Ports
Rev.2.00 Mar. 22, 2007 Page 149 of 684
REJ09B0352-0200
7.5.3
Pin Functions in Each Mode
The pin functions differ between mode 1, 3 (expanded modes with on-chip ROM disabled), modes
5 and 6 (expanded modes with on-chip ROM enabled), and mode 7 (single-chip mode). The pin
functions in each mode are described below.
Modes 1 and 3: Address output can be selected for each pin in port 5. Figure 7.13 shows the pin
functions in modes 1 and 3.
Port 5
A
(output)
A
(output)
A
(output)
A
(output)
19
18
17
16
Figure 7.13 Pin Functions in Modes 1 and 3 (Port 5)
Modes 5 and 6: Address output or generic input can be selected for each pin in port 5. A pin
becomes an address output pin if the corresponding P5DDR 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 P5DDR must be set to 1. Figure 7.14 shows the pin functions in modes 5 and 6.
Port 5
A
(output)
A
(output)
A
(output)
A
(output)
19
18
17
16
When P5DDR = 1
P5
(input)
P5
(input)
P5
(input)
P5
(input)
3
2
1
0
When P5DDR = 0
Figure 7.14 Pin Functions in Modes 5 and 6 (Port 5)
Mode 7: Input or output can be selected separately for each pin in port 5. A pin becomes an output
pin if the corresponding P5DDR bit is set to 1, and an input pin if this bit is cleared to 0. Figure
7.15 shows the pin functions in mode 7.



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