Datasheet

Section 9 I/O Ports
Rev. 3.00 Sep. 14, 2006 Page 121 of 408
REJ09B0105-0300
• P14/IRQ0 pin
Register PMR1 PCR1
Bit Name IRQ0 PCR14 Pin Function
Setting value 0 0 P14 input pin
1 P14 output pin
1 X IRQ0 input pin
[Legend]
X: Don't care
9.2 Port 2
Port 2 is a general I/O port also functioning as a SCI3 I/O pin. Each pin of the port 2 is shown in
figure 9.2. The register settings of PMR1 and SCI3 have priority for functions of the pins for both
uses.
P22/TXD
P21/RXD
P20/SCK3
Port 2
Figure 9.2 Port 2 Pin Configuration
Port 2 has the following registers.
• Port control register 2 (PCR2)
• Port data register 2 (PDR2)