HTG1390 Просмотр технического описания (PDF) - Holtek Semiconductor

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HTG1390

4-bit Microcontroller

Holtek Semiconductor 

DEC [R3R2]

Machine code

Description

Operation

DI

Machine code

Description

EI

Machine code

Description

HALT

Machine code

Description

Operation

IN A,Pi

Machine code

Description

Operation

INC A

Machine code

Description

Operation

INC Rn

Machine code

Description

Operation

Preliminary

HTG1390

Decrement data memory

00001111

Data in the data memory specified by the register pair “R3,R2” is decre-

mented by one. Carry flag is not affected.

M(R3,R2) ← M(R3,R2)–1

Disable interrupt

00101101

Internal time-out interrupt and external interrupt are disabled.

Enable interrupt

00101100

Internal time-out interrupt and external interrupt are enabled.

Halt system clock

00110111 00111110

Turn off system clock, and enter power down mode.

PC ← PC+2

Input port to accumulator

PS 0 0 1 1 0 0 1 1

PP 0 0 1 1 0 1 0 0

The data on port “Pi” is transferred to the accumulator.

ACC ← Pi; Pi=PS or PP

Increment accumulator

00110001

Data in the accumulator is incremented by one. Carry flag is not affected.

ACC ← ACC+1

Increment register

0001nnn0

Data in the working register “Rn” is incremented by one. Carry flag is not

affected.

Rn ← Rn+1; Rn=R0~R4 for nnn=0~4

18

17th Nov ’98

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