NEC PD75402A - Manual (Page 61)

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CHAPTER 5. PERIPHERAL HARDWARE FUNCTIONS
Table 5-3 Operations with Input/Output Port Handling Instructions
SKT PORTn.bit
SKF PORTn.bit
AND1 CY, PORTn.bit
OR1
CY, PORTn.bit
XOR1 CY, PORTn.bit
IN A, PORTn
MOV A, PORTn
OUT PORTn, A
MOV PORTn, A
XCH A, PORTn
INCS PORTn
SET1 PORTn.bit
CLR1 PORTn.bit
SKTCLR PORTn.bit
Output Mode
Tests output latch data.
Operation between output latch
data and CY
Transfers output latch data to
accumulator.
Transfers accumulator data to
output data to output latches,
and outputs data from pins.
Exchanges data between output
latches and accumulator.
Increments output latch contents
by 1.
Changes output pin status as per
instruction.
Input Mode
Tests pin data.
Operation between pin data and
CY
Transfers pin data to accumula-
tor.
Transfers accumulator data to
output latches. (Output buffer
remains off.)
Transfers pin data to accumula-
tor, and transfers accumulator
data to output
latches. (Output buffer remains
off.)
Latches pin data + 1 in output
latches.
Specified bit output latch is
rewritten as per instruction,
but output latches for other bits
are undefined.
Instruction Executed
Port and Individual Pin Operations