HD6433935 Hitachi, HD6433935 Datasheet - Page 178
HD6433935
Manufacturer Part Number
HD6433935
Description
8-Bit MICROCONTROLLER
Manufacturer
Hitachi
Datasheet
1.HD6433935.pdf
(521 pages)
- Current page: 178 of 521
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1. Port data register 7 (PDR7)
PDR7 is an 8-bit register that stores data for port 7 pins P7
bits are set to 1, the values stored in PDR7 are read, regardless of the actual pin states. If port 7 is
read while PCR7 bits are cleared to 0, the pin states are read.
Upon reset, PDR7 is initialized to H'00.
2. Port control register 7 (PCR7)
PCR7 is an 8-bit register for controlling whether each of the port 7 pins P7
input pin or output pin. Setting a PCR7 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin.
Upon reset, PCR7 is initialized to H'00.
PCR7 is a write-only register, which always reads as all 1s.
166
Bit
Initial value
Read/Write
Bit
Initial value
Read/Write
PCR7
R/W
P7
W
7
0
7
0
7
7
PCR7
R/W
P7
W
6
0
6
0
6
6
PCR7
R/W
P7
W
5
0
5
0
5
5
PCR7
R/W
P7
W
4
0
4
0
4
4
PCR7
7
R/W
P7
to P7
W
3
0
3
0
3
3
0
. If port 7 is read while PCR7
PCR7
R/W
P7
W
2
0
2
0
2
2
7
to P7
PCR7
R/W
P7
W
1
0
1
0
0
1
functions as an
1
PCR7
R/W
P7
W
0
0
0
0
0
0
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