Panasonic MN101C77C - Manual (Page 163)

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