HT47C20 datasheet(44/56 Pages) HOLTEK

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DECA [m]

Decrement data memory-place result in accumulator

Description

Data in the specified data memory is decremented by one, leaving the re-

sult in the accumulator. The contents of the data memory remain un-

changed.

Operation

ACC ¬ [m]-1

Affected flag(s)

TC2 TC1

¾Ö¾

HALT

Enter power down mode

Description

This instruction stops program execution and turns off the system clock.

The contents of the RAM and registers are retained. The WDT is cleared.

The power down bit (PD) is set and the WDT time-out bit (TO) is cleared.

Operation

PC ¬ PC+1

PD ¬ 1

TO ¬ 0

Affected flag(s)

TC2 TC1

¾¾

¾¾¾¾

INC [m]

Increment data memory

Description

Data in the specified data memory is incremented by one.

Operation

[m] ¬ [m]+1

Affected flag(s)

TC2 TC1

¾Ö¾

INCA [m]

Increment data memory and place result in accumulator

Description

Data in the specified data memory is incremented by one, leaving the re-

sult in the accumulator. The contents of the data memory remain un-

changed.

Operation

ACC ¬ [m]+1

Affected flag(s)

TC2 TC1

¾Ö¾

HT47C20

January 18, 2000

HT47C20 Scheda tecnica(PDF) 44 Page - Holtek Semiconductor Inc

HT47C20 Scheda tecnica(HTML) 44 Page - Holtek Semiconductor Inc

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