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H838532H датащи(PDF) 190 Page - Renesas Technology Corp

номер детали H838532H
подробное описание детали  16-Bit Single-Chip Microcomputer H8 Family / H8/300H Super Low Power Series
PDF  508 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H838532H датащи(HTML) 190 Page - Renesas Technology Corp

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Section 8 I/O Ports
Rev. 1.00 May 30, 2008 Page 170 of 484
REJ09B0436-0100
(1) Port Data Register 3 (PDR3)
Bit
Initial value
Read/Write
7
P3
0
R/W
6
P3
0
R/W
5
P3
0
R/W
4
P3
0
R/W
3
P3
0
R/W
0
P3
0
R/W
2
P3
0
R/W
1
P3
0
R/W
21
0
54
76
3
PDR3 is an 8-bit register that stores data for port 3 pins P3
7 to P30. If port 3 is read while PCR3
bits are set to 1, the values stored in PDR3 are read, regardless of the actual pin states. If port 3 is
read while PCR3 bits are cleared to 0, the pin states are read.
Upon reset, PDR3 is initialized to H'00.
(2) Port Control Register 3 (PCR3)
Bit
Initial value
Read/Write
7
PCR3
0
W
6
PCR3
0
W
5
PCR3
0
W
4
PCR3
0
W
3
PCR3
0
W
0
PCR3
0
W
2
PCR3
0
W
1
PCR3
0
W
21
0
54
3
76
PCR3 is an 8-bit register for controlling whether each of the port 3 pins P3
7 to P30 functions as an
input pin or output pin. Setting a PCR3 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin. The settings in PCR3 and in PDR3 are valid only
when the corresponding pin is designated in PMR3 as a general I/O pin.
Upon reset, PCR3 is initialized to H'00.
PCR3 is a write-only register, which is always read as all 1s.



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