Samsung S3C8275X User Manual
Page 244
S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X
I/O
PORTS
9-9
Port 1 Pull-up Control Register (P1PUR)
E9H, Set 1, Bank 0, R/W
.7
.6
.5
.4
.3
.2
.1
.0
MSB
LSB
P1PUR bit configuration settings:
0
1
Enable pull-up resistor
Disable pull-up resistor
P1.3
P1.2
P1.1
P1.0
P1.7
P1.6
P1.5
P1.4
NOTE:
A pull-up resistor of port 1 is automatically disabled when the
corresponding pin is selected as push-pull output or alternative
function.
Figure 9-9. Port 1 Pull-up Control Register (P1PUR)
External Interrupt Control Register, High Byte (EXTICONH)
F8H, Set 1, Bank 0, R/W
.7
.6
.5
.4
.3
.2
.1
.0
MSB
LSB
P1.7/INT7
EXTICONH bit configuration settings:
00
01
Enable interrupt by falling edge
Disable interrupt
10
11
Enable interrupt by both falling and rising edge
Enable interrupt by rising edge
P1.6/INT6
P1.5/INT5
P1.4/INT4
Figure 9-10. External Interrupt Control Register, High Byte (EXTICONH)