Datasheet

Section 9 I/O Ports
Rev. 2.00 Sep. 23, 2005 Page 137 of 472
REJ09B0160-0200
9.7 Port 8
Port 8 is a general I/O port. Each pin of the port 8 is shown in figure 9.7.
P87
P86
P85
Port 8
Figure 9.7 Port 8 Pin Configuration
Port 8 has the following registers.
• Port control register 8 (PCR8)
• Port data register 8 (PDR8)
9.7.1 Port Control Register 8 (PCR8)
PCR8 selects inputs/outputs in bit units for pins to be used as general I/O ports of port 8.
Bit Bit Name
Initial
Value R/W Description
7
6
5
PCR87
PCR86
PCR85
0
0
0
W
W
W
When each of the port 8 pins P87 to P85 functions as a
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.
4 to 0    Reserved