hd66100 Renesas Electronics Corporation., hd66100 Datasheet - Page 149

• Manufacturer Part Number: hd66100
• Description: H8/3867 Series
• Manufacturer: Renesas Electronics Corporation.

1. Port data register 1 (PDR1)
PDR1 is an 8-bit register that stores data for port 1 pins P1
bits are set to 1, the values stored in PDR1 are read, regardless of the actual pin states. If port 1 is
read while PCR1 bits are cleared to 0, the pin states are read.
Upon reset, PDR1 is initialized to H'00.
2. Port control register 1 (PCR1)
PCR1 is an 8-bit register for controlling whether each of the port 1 pins P1
input pin or output pin. Setting a PCR1 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 PCR1 and in PDR1 are valid only
when the corresponding pin is designated in PMR1 as a general I/O pin.
Upon reset, PCR1 is initialized to H'00.
PCR1 is a write-only register, which is always read as all 1s.
134
Bit
Initial value
Read/Write
Bit
Initial value
Read/Write
PCR1
R/W
P1
W
7
0
7
0
7
7
PCR1
R/W
P1
W
6
0
6
0
6
6
PCR1
R/W
P1
W
5
0
5
0
5
5
PCR1
R/W
P1
W
4
0
4
0
4
4
PCR1
7
R/W
P1
to P1
W
3
0
3
0
3
3
0
. If port 1 is read while PCR1
PCR1
R/W
P1
W
2
0
2
0
2
2
7
to P1
PCR1
R/W
P1
W
1
0
1
0
0
1
functions as an
1
PCR1
R/W
P1
W
0
0
0
0
0
0