Datasheet

Section 9 I/O Ports
Rev. 1.50 Sep. 18, 2007 Page 148 of 584
REJ09B0240-0150
9.6.2 Port Data Register 8 (PDR8)
PDR8 is a general I/O port data register of port 8.
Bit Bit Name
Initial
Value R/W Description
7
6
5
P87
P86
P85
0
0
0
R/W
R/W
R/W
PDR8 stores output data for port 8 pins.
If PDR8 is read while PCR8 bits are set to 1, the values
stored in PDR8 are read. If PDR8 is read while PCR8
bits are cleared to 0, the pin states are read regardless
of the value stored in PDR8.
4 to 0  All 1  Reserved
These bits are always read as 1.
9.6.3 Pin Functions
The correspondence between the register specification and the port functions is shown below.
• P87 pin
Register PCR8
Bit Name PCR87 Pin Function
Setting Value 0 P87 input pin
1 P87 output pin
• P86 pin
Register PCR8
Bit Name PCR86 Pin Function
Setting Value 0 P86 input pin
1 P86 output pin