Datasheet

Section 9 I/O Ports
Rev. 3.00 Mar. 15, 2006 Page 142 of 526
REJ09B0060-0300
Port 9 has the following registers.
• Port control register 9 (PCR9)
• Port data register 9 (PDR9)
9.8.1 Port Control Register 9 (PCR9)
PCR9 selects inputs/outputs in bit units for pins to be used as general I/O ports of port 9.
Bit Bit Name
Initial
Value R/W Description
7
6
5
4
3
2
1
0
PCR97
PCR96
PCR95
PCR94
PCR93
PCR92
PCR91
PCR90
0
0
0
0
0
0
0
0
W
W
W
W
W
W
W
W
When each of the port 9 pins P97 to P90 functions as a
general I/O port, setting a PCR9 bit to 1 makes the
corresponding pin an output port, while clearing the bit
to 0 makes the pin an input port.
9.8.2 Port Data Register 9 (PDR9)
PDR9 is a general I/O port data register of port 9.
Bit Bit Name
Initial
Value R/W Description
7
6
5
4
3
2
1
0
P97
P96
P95
P94
P93
P92
P91
P90
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PDR9 stores output data for port 9 pins.
If PDR9 is read while PCR9 bits are set to 1, the values
stored in PDR9 are read. If PDR9 is read while PCR9
bits are cleared to 0, the pin states are read regardless
of the value stored in PDR9.