Samsung S3C8275X Computer Hardware User Manual


 
S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X CONTROL REGISTER
4-35
P4CONL — Port 4 Control Register (Low Byte) EAH Set 1, Bank 1
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
Reset Value
0 0 0 0 0 0 0 0
Read/Write
R/W R/W R/W R/W R/W R/W R/W R/W
Addressing Mode
Register addressing mode only
.7–.6 P4.3/SEG12 Configuration Bits
0 0 Input mode
0 1 Input mode with pull-up resistor
1 0 Push-pull output mode
1 1 Alternative function (SEG12)
.5–.4 P4.2/SEG13 Configuration Bits
0 0 Input mode
0 1 Input mode with pull-up resistor
1 0 Push-pull output mode
1 1 Alternative function (SEG13)
.3–.2 P4.1/SEG14 Configuration Bits
0 0 Input mode
0 1 Input mode with pull-up resistor
1 0 Push-pull output mode
1 1 Alternative function (SEG14)
.1–.0 P4.0/SEG15 Configuration Bits
0 0 Input mode
0 1 Input mode with pull-up resistor
1 0 Push-pull output mode
1 1 Alternative function (SEG15)