HD64336901G Renesas Technology, HD64336901G Datasheet - Page 152

• Manufacturer Part Number: HD64336901G
• Description: (HD64xxx Series) 16-BIT MICROCONTROLLER
• Manufacturer: Renesas Technology

9.5.1
PCR8 selects inputs/outputs in bit units for pins to be used as general I/O ports of port 8.
9.5.2
PDR8 is a general I/O port data register of port 8.
Rev. 1.00, 11/03, page 124 of 376
Bit
7 to 5
4
3
2
1
0
Bit
7 to 5
4
3
2
1
0
Bit Name
PCR84
PCR83
PCR82
PCR81
PCR80
Bit Name
P84
P83
P82
P81
P80
Port Data Register 8 (PDR8)
Port Control Register 8 (PCR8)
Initial
Value
0
0
0
0
0
Initial
Value
All 0
0
0
0
0
0
R/W
W
W
W
W
W
R/W
R/W
R/W
R/W
R/W
R/W
Description
Reserved
When each of the port 8 pins, P84 to P80, functions as an
general I/O port, setting a PCR8 bit to 1 makes the
corresponding pin an output port, while clearing the bit to
0 makes the pin an input port.
Description
Reserved
These bits store output data for port 8 pins.
If PDR8 is read while PCR8 bits are set to 1, the value
stored in PDR8 is read. If PDR8 is read while PCR8 bits
are cleared to 0, the pin states are read regardless of the
value stored in PDR8.