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H838532H датащи(PDF) 213 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) 213 Page - Renesas Technology Corp

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Section 8 I/O Ports
Rev. 1.00 May 30, 2008 Page 193 of 484
REJ09B0436-0100
(1) Port Data Register 8 (PDR8)
Bit
Initial value
Read/Write
7
P8
0
R/W
6
P8
0
R/W
5
P8
0
R/W
4
P8
0
R/W
3
P8
0
R/W
0
P8
0
R/W
2
P8
0
R/W
1
P8
0
R/W
76
5
4
3
2
1
0
PDR8 is an 8-bit register that stores data for port 8 pins P8
7 to P80. If port 8 is read while PCR8
bits are set to 1, the values stored in PDR8 are read, regardless of the actual pin states. If port 8 is
read while PCR8 bits are cleared to 0, the pin states are read.
Upon reset, PDR8 is initialized to H'00.
(2) Port Control Register 8 (PCR8)
Bit
Initial value
Read/Write
7
PCR8
0
W
6
PCR8
0
W
5
PCR8
0
W
4
PCR8
0
W
3
PCR8
0
W
0
PCR8
0
W
2
PCR8
0
W
1
PCR8
0
W
76
5
4
3
2
1
0
PCR8 is an 8-bit register for controlling whether each of the port 8 pins P8
7 to P80 functions as an
input or output pin. Setting a PCR8 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin. PCR8 and PDR8 settings are valid when the
corresponding pins are designated for general-purpose input/output by bits SGS3 to SGS0 in
LPCR.
Upon reset, PCR8 is initialized to H'00.
PCR8 is a write-only register, which is always read as all 1s.



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