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H83069RF Datasheet(PDF) 285 Page - Renesas Technology Corp

Part # H83069RF
Description  Renesas 16-Bit Single-Chip Microcomputer
PDF  1003 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H83069RF Datasheet(HTML) 285 Page - Renesas Technology Corp

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Rev. 5.0, 09/04, page 263 of 978
8.4
Port 3
8.4.1
Overview
Port 3 is an 8-bit input/output port also used for data bus, with the pin configuration shown in
figure 8.3. Port 3 is a data bus in modes 1 to 5 (expanded modes) and a generic input/output port
in mode 7 (single-chip mode).
Pins in port 3 can drive one TTL load and a 90-pF capacitive load. They can also drive a
darlington transistor pair.
Port 3
P3 /D
P3 /D
P3 /D
P3 /D
P3 /D
P3 /D
P3 /D
P3 /D
7
6
5
4
3
2
1
0
15
14
13
12
11
10
9
8
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
D
(input/output)
D
(input/output)
D
(input/output)
D
(input/output)
D
(input/output)
D
(input/output)
D
(input/output)
D
(input/output)
15
14
13
12
11
10
9
8
Port 3 pins
Mode 7
Modes 1 to 5
Figure 8.3 Port 3 Pin Configuration
8.4.2
Register Descriptions
Table 8.5 summarizes the registers of port 3.
Table 8.5
Port 3 Registers
Address*
Name
Abbreviation
R/W
Initial Value
H'EE002
Port 3 data direction register
P3DDR
W
H'00
H'FFFD2
Port 3 data register
P3DR
R/W
H'00
Note: * Lower 20 bits of the address in advanced mode.



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