Datasheet
Section 9 I/O Ports
Rev. 6.00 Mar. 24, 2006 Page 131 of 412
REJ09B0142-0600
Port 7 has the following registers.
• Port control register 7 (PCR7)
• Port data register 7 (PDR7)
9.4.1 Port Control Register 7 (PCR7)
PCR7 selects inputs/outputs in bit units for pins to be used as general I/O ports of port 7.
Bit Bit Name
Initial
Value R/W Description
7 Reserved
6
5
4
PCR76
PCR75
PCR74
0
0
0
W
W
W
Setting a PCR7 bit to 1 makes the corresponding pin an
output port, while clearing the bit to 0 makes the pin an
input port. Note that the TCSRV setting of the timer V
has priority for deciding input/output direction of the
P76/TMOV pin.
3
2
1
0
Reserved
9.4.2 Port Data Register 7 (PDR7)
PDR7 is a general I/O port data register of port 7.
Bit Bit Name
Initial
Value R/W Description
7 1 Reserved
This bit is always read as 1.
6
5
4
P76
P75
P74
0
0
0
R/W
R/W
R/W
PDR7 stores output data for port 7 pins.
PDR7 is read while PCR7 bits are set to 1, the value
stored in PDR7 is read. If PDR7 is read while PCR7 bits
are cleared to 0, the pin states are read regardless of
the value stored in PDR7.
3
2
1
0
1
1
1
1
Reserved
These bits are always read as 1.