Samsung S3C8275X User Manual
Page 247
I/O PORTS
S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X
9-12
Port 2 Control Register, Low Byte (P2CONL)
EBH, Set 1, Bank 0, R/W
.7
.6
.5
.4
.3
.2
.1
.0
MSB
LSB
P2.3/SEG28
P2CONL bit-pair pin configuration settings:
00
01
10
11
Alternative function (SEG28-SEG31/V
BLDREF
)
P2.2/SEG29 P2.1/SEG30
P2.0/SEG31/V
BLDREF
Input mode
N-channel open-drain output mode
Push-pull output mode
Figure 9-14. Port 2 Low-byte Control Register (P2CONL)
Port 2 Pull-up Control Register (P2PUR)
ECH, Set 1, Bank 0, R/W
.7
.6
.5
.4
.3
.2
.1
.0
MSB
LSB
P2PUR bit configuration settings:
0
1
Enable pull-up resistor
Disable pull-up resistor
P2.3
P2.2
P2.1
P2.0
P2.7
P2.6
P2.5
P2.4
NOTE:
A pull-up resistor of port 2 is automatically disabled when the
corresponding pin is selected as push-pull output or alternative
function.
Figure 9-15. Port 2 Pull-up Control Register (P2PUR)