HT66F13 datasheet(146/173 Pages) HOLTEK

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SIZ [m]

SkipifincrementDataMemoryis0

Description

The contents of the specified Data Memory are first incremented 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

SIZA [m]

SkipifincrementDataMemoryiszerowithresultin ACC

Description

The contents of the specified Data Memory are first incremented 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

theresultisnot0theprogramproceedswiththefollowinginstruction.

Operation

ACC

¬ [m]+1

Skipif ACC =0

Affected flag(s)

None

SNZ [m].i

Skipifbit i ofDataMemoryisnot0

Description

If bit i of the specified Data Memory is not 0, the following instruction is skipped. As this

requires the insertion of a dummy instruction while the next instruction is fetched, it is a

two cycle instruction. If the result is 0 the program proceeds with the following instruc-

tion.

Operation

Skipif[m].i

¹ 0

Affected flag(s)

None

SUB A,[m]

SubtractDataMemoryfrom ACC

Description

The specified Data Memory is subtracted from the contents of the Accumulator. The re-

sult 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 is positive or zero, the C flag will be set to

Operation

ACC

¬ ACC - [m]

Affected flag(s)

OV,Z,AC,C

SUBM A,[m]

SubtractDataMemoryfrom ACC withresultinDataMemory

Description

The specified Data Memory is subtracted from the contents of the Accumulator. The re-

sult 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 is positive or zero, the C flag will be set to

Operation

[m]

¬ ACC - [m]

Affected flag(s)

OV,Z,AC,C

SUB A,x

Subtractimmediatedatafrom ACC

Description

The immediate data specified by the code is subtracted from the contents of the Accumu-

lator. The result is stored in the Accumulator. Note that if the result of subtraction is neg-

ative, the C flag will be cleared to 0, otherwise if the result is positive or zero, the C flag

willbesetto1.

Operation

ACC

¬ ACC - x

Affected flag(s)

OV,Z,AC,C

HT66F13/HT66F14/HT66F15

EnhancedA/DFlashTypeMCU

Rev.1.10

146

February9,2011

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