Datasheet

Section 9 I/O Ports
Rev. 3.00 Mar. 15, 2006 Page 134 of 526
REJ09B0060-0300
9.6 Port 7
Port 7 is a general I/O port also functioning as a timer V I/O pin and SCI3_2 I/O pin. Each pin of
the port 7 is shown in figure 9.6. The register settings of the timer V and SCI3_2 have priority for
functions of the pins for both uses.
P76/TMOV
P77
P75/TMCIV
P74/TMRIV
P72/TXD_2
P71/RXD_2
P70/SCK3_2
Port 7
Figure 9.6 Port 7 Pin Configuration
Port 7 has the following registers.
• Port control register 7 (PCR7)
• Port data register 7 (PDR7)
9.6.1 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
6
5
4
3
2
1
0
PCR77
PCR76
PCR75
PCR74

PCR72
PCR71
PCR70
0
0
0
0

0
0
0
W
W
W
W

W
W
W
When each of the port 7 pins P77 to P74 and P72 to
P70 functions as a general I/O port, 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.
Bit 3 is a reserved bit.