hd66100 Renesas Electronics Corporation., hd66100 Datasheet - Page 179
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hd66100
Manufacturer Part Number
hd66100
Description
H8/3867 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD66100.pdf
(495 pages)
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1. Port data register 8 (PDR8)
PDR8 is an 8-bit register that stores data for port 8 pins P8
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)
PCR8 is an 8-bit register for controlling whether each of the port 8 pins P8
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.
164
Bit
Initial value
Read/Write
Bit
Initial value
Read/Write
PCR8
R/W
P8
W
7
0
7
0
7
7
PCR8
R/W
P8
W
6
0
6
0
6
6
PCR8
R/W
P8
W
5
0
5
0
5
5
PCR8
R/W
P8
W
4
0
4
0
4
4
PCR8
7
R/W
P8
to P8
W
3
0
3
0
3
3
0
. If port 8 is read while PCR8
PCR8
R/W
P8
W
2
0
2
0
2
2
7
to P8
PCR8
R/W
P8
W
1
0
1
0
0
1
functions as an
1
PCR8
R/W
P8
W
0
0
0
0
0
0
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