UPD77111 datasheet(39/80 Pages) NEC

39 / 80 page

Data Sheet U12801EJ4V0DS00

µµµµPD77110, 77111, 77112

Instructions Simultaneously Written

Flag

Instruc-

tion

Instruction

Name

Mnemonic

Operation

Trino-

mial

Bino-

mial

Unino-

minal

Load/

store

Trans-

fer

Imme-

diate-

value

Bran-

Loop

Cont-

rol

Jump

JMP imm

← imm

indirect jump

JMP dp

← dp

Subroutine call

CALL imm

← SP + 1

STK

← PC + 1

← imm

indirect

subroutine call

CALL dp

← SP + 1

STK

← PC + 1

← dp

Return

RET

← STK

← SP − 1

Branch

Interrupt return

RETI

← STK

STK

← SP − 1

Recovery of interrupt

enable flag

Repeat

REP count

Start

← count

← 0

During repeat

← PC

← RC − 1

End

← PC + 1

← 1

Loop

LOOP count

(instruction of two or

more lines)

Start

← count

← 0

During repeat

← PC

← RC − 1

End

← PC + 1

← 1

Hard-

ware

loop

Loop hop

LPOP

← LSR3

← LSR2

← LSR1

LSP

← LSP − 1

No operation

NOP

← PC + 1

Halt

HALT

CPU stops.

Stop

STOP

CPU, PLL, and

OSC stop.

Condition

IF (ro cond)

Condition test

{{

{

Control

Forget interrupt

FINT

Discard interrupt

request

UPD77111 Datasheet(PDF) 39 Page - NEC

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