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