HT66F13 datasheet(145/173 Pages) HOLTEK

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SBC A,[m]

SubtractDataMemoryfrom ACC withCarry

Description

The contents of the specified Data Memory and the complement of the carry flag are

subtracted from the Accumulator. The result is stored in the Accumulator. Note that if

the result of subtraction is negative, the C flag will be cleared to 0, otherwise if the result

ispositiveorzero,theCflagwillbesetto1.

Operation

ACC

¬ ACC - [m] - C

Affected flag(s)

OV,Z,AC,C

SBCM A,[m]

SubtractDataMemoryfrom ACC withCarryandresultinDataMemory

Description

The contents of the specified Data Memory and the complement of the carry flag are

subtracted from the Accumulator. The result is stored in the Data Memory. Note that if

the result of subtraction is negative, the C flag will be cleared to 0, otherwise if the result

ispositiveorzero,theCflagwillbesetto1.

Operation

[m]

¬ ACC - [m] - C

Affected flag(s)

OV,Z,AC,C

SDZ [m]

SkipifdecrementDataMemoryis0

Description

The contents of the specified Data Memory are first decremented by 1. If the result is 0

the following instruction is skipped. As this requires the insertion of a dummy instruc-

tion while the next instruction is fetched, it is a two cycle instruction. If the result is not 0

theprogramproceedswiththefollowinginstruction.

Operation

[m]

¬ [m] - 1

Skipif[m]=0

Affected flag(s)

None

SDZA [m]

SkipifdecrementDataMemoryiszerowithresultin ACC

Description

The contents of the specified Data Memory are first decremented by 1. If the result is 0,

the following instruction is skipped. The result is stored in the Accumulator but the spec-

ified Data Memory contents remain unchanged. As this requires the insertion of a

dummy instruction while the next instruction is fetched, it is a two cycle instruction. If

theresultisnot0,theprogramproceedswiththefollowinginstruction.

Operation

ACC

¬ [m] - 1

Skipif ACC =0

Affected flag(s)

None

SET [m]

SetDataMemory

Description

EachbitofthespecifiedDataMemoryissetto1.

Operation

[m]

¬ FFH

Affected flag(s)

None

SET [m].i

SetbitofDataMemory

Description

Bit i ofthespecifiedDataMemoryissetto1.

Operation

[m].i

¬ 1

Affected flag(s)

None

Rev.1.10

145

February9,2011

HT66F13/HT66F14/HT66F15

EnhancedA/DFlashTypeMCU

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