HTG1390 データシートの表示（PDF） - Holtek Semiconductor
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HTG1390 Datasheet PDF : 27 Pages
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SUB A,[R1R0]
Machine code
Description
Operation
TIMER OFF
Machine code
Description
TIMER ON
Machine code
Description
TIMER XXH
Machine code
Description
Operation
XOR A,XH
Machine code
Description
Operation
XOR A,[R1R0]
Machine code
Description
Operation
XOR [R1R0],A
Machine code
Description
Operation
Preliminary
HTG1390
Subtract data memory contents from accumulator
00001011
The contents of the data memory addressed by the register pair “R1,R0” is
subtracted from the accumulator. Carry is set if a borrow does not take
place in subtraction; otherwise carry is cleared.
ACC ← ACC+M(R1,R0)+1
Set timer stop counting
00111001
The timer stops counting, when the “TIMER OFF” instruction is executed.
Set timer start counting
00111000
The timer starts counting, when the “TIMER ON” instruction is executed.
Set immediate data to timer counter
01000111 dddddddd
The 8-bit data specified by the code is loaded to the timer counter.
TIMER ← XXH
Logical XOR immediate data to accumulator
01000011 0000dddd
Data in the accumulator is Exclusive-ORed with the immediate data speci-
fied by the code.
ACC ← ACC “XOR” XH
Logical XOR accumulator with data memory
00011011
Data in the accumulator is Exclusive-ORed with the data memory ad-
dressed by the register pair “R1,R0”.
ACC ← ACC “XOR” M(R1,R0)
Logical XOR data memory with accumulator
00011110
Data in the data memory addressed by the register pair “R1,R0” is logi-
cally Exclusive-ORed with the accumulator.
M(R1,R0) ← M(R1,R0) “XOR” ACC
27
17th Nov ’98
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