Datasheet

Section 9 I/O Ports

Rev. 2.00 Sep. 23, 2005 Page 118 of 472

REJ09B0160-0200

• P20/SCK3 pin

Bit Name CKE1 CKE0 COM PCR20 Pin Function

Setting Value 0 0 0 0 P20 input pin

1 P20 output pin

0 0 1 X SCK3 output pin

0 1 X X SCK3 output pin

1 X X X SCK3 input pin

[Legend]

X: Don't care.

9.3 Port 3

Port 3 is a general I/O port. Each pin of the port 3 is shown in figure 9.3.

P37

P36

P35

P34

P33

P32

P31

P30

Port 3

Figure 9.3 Port 3 Pin Configuration

Port 3 has the following registers.

• Port control register 3 (PCR3)

• Port data register 3 (PDR3)