Port 3 Low Byte Control Register (P3Conl); Port 3 Pull-Up Control Register (P3Pur) - Samsung S3C8275X User Manual

I/O PORTS
9-14
Port 3 Control Register, Low Byte (P3CONL)
EEH, Set 1, Bank 0, R/W
MSB .7 .6
P3.3/SEG20 P3.2/SEG21
P3CONL bit-pair pin configuration settings:
00 Input mode
01 N-channel open-drain output mode
10 Push-pull output mode
11 Alternative function (SEG20-SEG23)
Figure 9-17. Port 3 Low Byte Control Register (P3CONL)

Port 3 Pull-up Control Register (P3PUR)

EFH, Set 1, Bank 0, R/W
MSB .7 .6
P3.7 P3.6 P3.5
P3PUR bit configuration settings:
0
Disable pull-up resistor
1
Enable pull-up resistor
NOTE: A pull-up resistor of port 3 is automatically disabled when the
corresponding pin is selected as push-pull output or alternative
function.
Figure 9-18. Port 3 Pull-up Control Register (P3PUR)
S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X
.5 .4 .3 .2
P3.1/SEG22 P3.0/SEG23
.5 .4 .3 .2
P3.4 P3.3 P3.2
.1 .0 LSB
.1 .0 LSB
P3.1 P3.0