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CONTROL REGISTERS S3F80P5_UM_ REV1.00
P1CONH — Port 1 Control Register (High Byte) EAH Set1 Bank0
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
Reset Value
1 1 1 1 1 1 1 1
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 and .6 P1.7 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
.5 and .4 P1.6 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
.3 and .2 P1.5 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
.1 and .0 P1.4 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
NOTE: P1CONH is available in case of S3F80P5’s 32-pin, not in 28-pin.
P1CONH’s reset value is 0FFH. After reset, initial values of port1.4-.7 become CMOS input with pull-up
mode.
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