Filter
Top Products
Chapter 3 Port Functions
50
I/O Port Configuration and Functions
■ Pin Configuration for P20, P22 to P23
Figure 3-3-4 Configuration and Functions of P20, P22, P23
R
D
L
Q
Reset
Write
Read
Read
Schmitt trigger input
Pull-up resistor control
Port input data
Special function input data
Data bus
P2PLU0 P2PLU2
P2IN0 P2IN2
P2PLU
(X'03F42')
P2IN
(X'03F22')
IRQ0 IRQ2
Pull-up
resistor
control
Port input
Special function
input
Control bit
Register
(address)
Control bit
Register
(address)
Interrupt input
P20 P22
P23
P2PLU3
P2IN3
IRQ3
*
P23 is only for
48-pin package.