Port 1 Control Register (Low Byte) - Samsung S3C80A5B User Manual

CONTROL REGISTERS
P1CONL

— Port 1 Control Register (Low Byte)

Bit Identifier
RESET Value
Read/Write
Addressing Mode
.7–.6
.5–.4
.3–.2
.1–.0
4-20
.7 .6
0 0
R/W R/W
Register addressing mode only
P1.3 Mode Selection Bits
0 0 C-MOS input mode
0 1 Open-drain output mode
1 0 Push-pull output mode
1 1 Invalid setting
P1.2 Mode Selection Bits
0 0 C-MOS input mode
0 1 Open-drain output mode
1 0 Push-pull output mode
1 1 Invalid setting
P1.1 Mode Selection Bits
0 0 C-MOS input mode
0 1 Open-drain output mode
1 0 Push-pull output mode
1 1 Invalid setting
P1.0 Mode Selection Bits
0 0 C-MOS input mode
0 1 Open-drain output mode
1 0 Push-pull output mode
1 1 Invalid setting
.5 .4
0 0
R/W R/W R/W
EBH
.3 .2 .1
0 0 0
R/W R/W
S3C80A5B
Set 1
.0
0
R/W