4250 查看數據表（PDF） - MITSUBISHI ELECTRIC

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4250

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

MITSUBISHI ELECTRIC  

MITSUBISHI MICROCOMPUTERS

4250 Group

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

Skip condition

Detailed description

Continuous

description

–

– 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 (DR2 DR1 DR0 A3 A2 A1 A0) specified by registers A and D in page p.

When this instruction is executed, 1 stage of stack register is used.

–

–

Overflow = 0

–

–

(CY) = 0

–

–

–

– Adds the contents of M(DP) to register A. Stores the result in register A. The contents of carry flag CY

remains unchanged.

0/1 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.

1 Sets (1) to carry flag CY.

0 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.

0/1 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.

MITSUBISHI

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