Intel 8XC196MC User Manual page 508

P x _MODE
x = 2, 5 (8XC196MC)
x = 2, 5, 7 (8XC196MD)
x = 1, 2, 5 (8XC196MH)
Each bit of the port x mode (P x _MODE) register controls whether the corresponding pin functions as a
standard I/O port pin or as a special-function signal.
7
x = 1 (MH) —
7
x = 2, 5 (M x ) PIN7
7
x = 7 (MD) PIN7
Bit Bit
Number Mnemonic
†
7:0 PIN7:0
†
The bits shown as dashes (—) are reserved; for compatibility with future devices, write zeros to these
bits.
Table C-7. P x _MODE Addresses and Reset Values
Register
P1_MODE (8XC196MH)
P2_MODE (8XC196M x )
P5_MODE (8XC196MC, MD)
P5_MODE (8XC196MH)
P7_MODE (8XC196MD)
— —
PIN6 PIN5 PIN4
PIN6 PIN5 PIN4
Port x Pin y Mode
This bit determines the mode of the corresponding port pin:
0 = standard I/O port pin
1 = special-function signal
Table C-8 lists the special-function signals for each pin.
Address
1F99H
1FD0H
1FF1H
1FF1H
1FD1H
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Reset State:
— PIN3 PIN2
PIN3 PIN2
PIN3 PIN2
Function
Reset Value
00H
00H
FFH when pin is not driven
80H if the EA# pin is high, A9H if EA# is low
00H
REGISTERS
Px_MODE
Address: Table C-7
0
PIN1 PIN0
0
PIN1 PIN0
0
PIN1 PIN0
C-31