Samsung S3C9228/P9228, 8-Bit CMOS Microcontroller Port 1 Interrupt Edge Selection Register P1EDGE

I/O PORTS S3C9228/P9228

MSB

Port 1 Interrupt Edge Selection Register (P1EDGE)

F2H, Page 0, R/W

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

LSB

Not used	P1.3	P1.2	P1.1	P1.0
	(INT)	(INT)	(INT)	(INT)

P1EDGE bit configuration settings:

0Falling edge detection

1Rising edge detection

Figure 9-10. Port 1 Interrupt Edge Selection Register (P1EDGE)

Port 1 Pull-up Control Register (P1PUR)

F0H, Page 0, R/W

MSB .7

.6

.5

.4

.3

.2

.1

.0

LSB

Not used P1.3 P1.2 P1.1 P1.0

P1PUR bit configuration settings:

0Disable pull-up resistor

1Enable pull-up resistor

Figure 9-11. Port 1 Pull-up Control Register (P1PUR)

9-8