HD6433935 Hitachi, HD6433935 Datasheet - Page 180

• Manufacturer Part Number: HD6433935
• Description: 8-Bit MICROCONTROLLER
• Manufacturer: Hitachi

8.9
8.9.1
Port 8 is an 8-bit I/O port configured as shown in figure 8-8.
8.9.2
Table 8-23 shows the port 8 register configuration.
Table 8-23 Port 8 Registers
Name
Port data register 8
Port control register 8
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.
168
Bit
Initial value
Read/Write
Port 8
Overview
Register Configuration and Description
R/W
P8
7
0
7
Figure 8-8 Port 8 Pin Configuration
R/W
P8
6
0
6
Abbrev.
PDR8
PCR8
Port 8
R/W
P8
5
0
5
R/W
P8
R/W
R/W
W
4
0
4
7
R/W
P8
to P8
P8
P8
P8
P8
P8
P8
P8
P8
3
0
3
7
6
5
4
3
2
1
0
Initial Value
H'00
H'00
0
. If port 8 is read while PCR8
R/W
P8
2
0
2
R/W
P8
1
0
Address
H'FFDB
H'FFEB
1
R/W
P8
0
0
0