Panasonic F77G User Manual page 163

4-3-2 Registers
7 6
- -
P1OUT
Port 1 output register (P1OUT : x'03F11', R/W)
7 6
P1IN - -
Port 1 input register (P1IN : x'03F21', R)
7 6
- -
P1DIR
Port 1 direction control register (P1DIR : x'03F31', R/W)
7 6
- -
P1PLU
Port 1 pull-up resistor control register (P1PLU : x'03F41', R/W)
5 4 3 2
- P1OUT4
P1OUT3 P1OUT2 P1OUT1 P1OUT0
5 4 3 2
- P1IN4 P1IN3 P1IN2
5 4 3 2
- P1DIR4
P1DIR3 P1DIR2 P1DIR1 P1DIR0
5 4 3 2
- P1PLU4
P1PLU3 P1PLU2 P1PLU1 P1PLU0
Figure 4-3-1 Port 1 Registers (1/3)
1 0
( At reset : - - - 0 0 0 0 0 )
P1OUT
0
1
1 0
( At reset : - - - X X X X X )
P1IN1 P1IN0
P1IN
0
1
1 0
( At reset : - - - 0 0 0 0 0 )
P1DIR
0
1
1 0
( At reset : - - - 0 0 0 0 0 )
P1PLU
0
1
Chapter 4 I/O Ports
Output data
Low (V level)
SS
High (V level)
DD
Input data
Pin is low(V level).
SS
Pin is high(V level).
DD
I/O mode selection
Input mode
Output mode
Pull-up resistor selection
No pull-up resistor
Pull-up resistor
IV - 13
Port 1