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Detailed description
C
41
MITSUBISHI MICROCOMPUTERS
4250 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
Continuous
description
–
–
–
Overflow = 0
–
–
(CY) = 0
–
–
–
–
–
–
0/1
–
1
0
–
–
0/1
–
Loads the value n in the immediate field to register A.
When the LA instructions are continuously coded and executed, only the first LA instruction is executed
and other LA instructions coded continuously are skipped.
Transfers bits 7 to 4 to register B and bits 3 to 0 to register A. These bits 7 to 0 are the ROM pattern in
address (DR
2
DR
1
DR
0
A
3
A
2
A
1
A
0
) specified by registers A and D in page p.
When this instruction is executed, 1 stage of stack register is used.
Adds the contents of M(DP) to register A. Stores the result in register A. The contents of carry flag CY
remains unchanged.
Adds the contents of M(DP) and carry flag CY to register A. Stores the result in register A and carry flag
CY.
Adds the value n in the immediate field to register A.
The contents of carry flag CY remains unchanged.
Skips the next instruction when there is no overflow as the result of operation.
Sets (1) to carry flag CY.
Clears (0) to carry flag CY.
Skips the next instruction when the contents of carry flag CY is “0.”
Stores the one‘s complement for register A‘s contents in register A.
Rotates 1 bit of the contents of register A including the contents of carry flag CY to the right.
Execute the logic operation selected by logic operation selection register LO between the contents of
register A and port S, and stores the result in register A.