Samsung 8-Bit CMOS Microcontroller, S3C9228/P9228 Port 3 Interrupt Edge Selection Register P3EDGE

S3C9228/P9228 I/O PORTS

Port 3 Interrupt Edge Selection Register (P3EDGE)

F8H, Page 0, R/W

MSB .7 .6 .5 .4 .3 .2 .1 .0

LSB

Not used	P3.1 P3.0
	(INTP) (INTP)

P3EDGE bit configuration settings:

0

1

Falling edge detection

Rising edge detection

Figure 9-17. Port 3 Interrupt Edge Selection Register (P3EDGE)

Port 3 Pull-up Control Register (P3PUR)

F6H, Page 0, R/W

MSB .7

.6

.5

.4

.3

.2

.1

.0

LSB

Not used P3.1 P3.0

P3PUR bit configuration settings:

0

1

Disable pull-up resistor

Enable pull-up resistor

Figure 9-18. Port 3 Pull-up Control Register (P3PUR)

9-13