HT37B90 datasheet(70/80 Pages) HOLTEK

70 / 80 page

CPL [m]

ComplementDataMemory

Description

Each bit of the specified Data Memory is logically complemented (1

¢s complement). Bits

whichpreviouslycontaineda1arechangedto0andviceversa.

Operation

[m]

¬ [m]

Affectedflag(s)

CPLA [m]

ComplementDataMemorywithresultin ACC

Description

Each bit of the specified Data Memory is logically complemented (1

¢s complement). Bits

which previously contained a 1 are changed to 0 and vice versa. The complemented result

isstoredintheAccumulatorandthecontentsoftheDataMemoryremainunchanged.

Operation

ACC

¬ [m]

Affectedflag(s)

DAA [m]

Decimal-Adjust ACC foradditionwithresultinDataMemory

Description

Convert the contents of the Accumulator value to a BCD ( Binary Coded Decimal) value re-

sulting from the previous addition of two BCD variables. If the low nibble is greater than 9 or

if AC flag is set, then a value of 6 will be added to the low nibble. Otherwise the low nibble

remains unchanged. If the high nibble is greater than 9 or if the C flag is set, then a value of

6 will be added to the high nibble. Essentially, the decimal conversion is performed by add-

ing 00H, 06H, 60H or 66H depending on the Accumulator and flag conditions. Only the C

flag may be affected by this instruction which indicates that if the original BCD sum is

greaterthan100,itallowsmultipleprecisiondecimaladdition.

Operation

[m]

¬ ACC +00Hor

[m]

¬ ACC +06Hor

[m]

¬ ACC +60Hor

[m]

¬ ACC +66H

Affectedflag(s)

DEC[m]

DecrementDataMemory

Description

DatainthespecifiedDataMemoryis decremented by1.

Operation

[m]

¬ [m] - 1

Affectedflag(s)

DECA [m]

DecrementDataMemorywithresultin ACC

Description

Data in the specified Data Memory is decremented by 1. The result is stored in the Accu-

mulator.ThecontentsoftheDataMemoryremainunchanged.

Operation

ACC

¬ [m] - 1

Affectedflag(s)

HALT

Enterpowerdownmode

Description

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

of the Data Memory and registers are retained. The WDT and prescaler are cleared. The

powerdownflag PDF issetandthe WDT time-outflagTOiscleared.

Operation

¬ 0

PDF

¬ 1

Affectedflag(s)

TO, PDF

HT37B90/HT37B70/HT37B50/HT37B30

Rev.1.00

June22,2017

HT37B90 Datasheet(PDF) 70 Page - Holtek Semiconductor Inc

HT37B90 Datasheet(HTML) 70 Page - Holtek Semiconductor Inc

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