Intel 80C196NU User Manual
8XC196NP, 80C196NU USER’S MANUAL
C-32
Px_PIN
P
x
_PIN
x
= 1–4
Address:
Reset State:
Table C-13
Each bit of the port
x
pin input (P
x
_PIN) register reflects the current state of the corresponding pin,
regardless of the pin configuration.
7
0
x
= 1–3
PIN7
PIN6
PIN5
PIN4
PIN3
PIN2
PIN1
PIN0
7
0
x
= 4
—
—
—
—
PIN3
PIN2
PIN1
PIN0
Bit Number
Bit
Mnemonic
Function
7:0
PIN7:0
Port
x
Pin
y
Input Value
This bit contains the current state of P
x
.
y
.
Table C-13. P
x_PIN Addresses and Reset Values
Register
Address
Reset Value
P1_PIN
1FD6H
XXH
P2_PIN
1FD7H
XXH
P3_PIN
1FDEH
XXH
P4_PIN
1FDFH
XXH