P4Conh Port 4 Control Register (High Byte) - Samsung S3F80JB User Manual

8-bit cmos microcontrollers
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S3F80JB
P4CONH
— Port 4 Control Register (High Byte)
Bit Identifier
Reset Value
Read/Write
Addressing Mode
.7 and .6
.5 and .4
.3 and .2
.1 and .0
NOTE: After CPU reset, P4.7- P4.4 will be C-MOS input with pull up mode by the reset value of P4CONH register.
.7
.6
1
1
R/W
R/W
Register addressing mode only
P4.7 Mode Selection Bits
0
0
C-MOS input mode
0
1
Open-drain output mode
1
0
Push-pull output mode
1
1
C-MOS input with pull up mode
P4.6 Mode Selection Bits
0
0
C-MOS input mode
0
1
Open-drain output mode
1
0
Push-pull output mode
1
1
C-MOS input with pull up mode
P4.5 Mode Selection Bits
0
0
C-MOS input mode
0
1
Open-drain output mode
1
0
Push-pull output mode
1
1
C-MOS input with pull up mode
P4.4 Mode Selection Bits
0
0
C-MOS input mode
0
1
Open-drain output mode
1
0
Push-pull output mode
1
1
C-MOS input with pull up mode
.5
.4
.3
1
1
R/W
R/W
R/W
CONTROL REGISTERS
E2H
Set1 Bank1
.2
.1
1
1
1
R/W
R/W
.0
1
R/W
4-35

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