Datasheet

Section 9 I/O Ports

Rev.4.00 Nov. 02, 2005 Page 102 of 304

REJ09B0143-0400

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 5

Port 5 is a general I/O port also functioning as an A/D trigger input pin and wakeup interrupt input

pin. Each pin of the port 5 is shown in figure 9.3.

P57

P56

P55/WKP5/ADTR

P54/WKP4

P53/WKP3

P52/WKP2

P51/WKP1

P50/WKP0

Port 5

Figure 9.3 Port 5 Pin Configuration

Port 5 has the following registers.

• Port mode register 5 (PMR5)

• Port control register 5 (PCR5)

• Port data register 5 (PDR5)

• Port pull-up control register 5 (PUCR5)