HT45F0057 datasheet(82/88 Pages) HOLTEK

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Rev. 1.00

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HT45F0057

Induction Cooker Flash MCU

HT45F0057

Induction Cooker Flash MCU

SUBM A,[m]

Subtract Data Memory from ACC with result in Data Memory

Description

The specified Data Memory is subtracted from the contents of 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 is positive or zero, the C flag will be set to 1.

Operation

[m] ← ACC − [m]

Affected flag(s)

OV, Z, AC, C

SUB A,x

Subtract immediate data from ACC

Description

The immediate data specified by the code is subtracted from the contents of 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 is positive or zero, the C flag will be set to 1.

Operation

ACC ← ACC − x

Affected flag(s)

OV, Z, AC, C

SWAP [m]

Swap nibbles of Data Memory

Description

The low-order and high-order nibbles of the specified Data Memory are interchanged.

Operation

[m].3~[m].0 ↔ [m].7~[m].4

Affected flag(s)

None

SWAPA [m]

Swap nibbles of Data Memory with result in ACC

Description

The low-order and high-order nibbles of the specified Data Memory are interchanged. The

result is stored in the Accumulator. The contents of the Data Memory remain unchanged.

Operation

ACC.3~ACC.0 ← [m].7~[m].4

ACC.7~ACC.4 ← [m].3~[m].0

Affected flag(s)

None

SZ [m]

Skip if Data Memory is 0

Description

If the contents of the specified Data Memory is 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 not 0 the program proceeds with the following instruction.

Operation

Skip if [m]=0

Affected flag(s)

None

SZA [m]

Skip if Data Memory is 0 with data movement to ACC

Description

The contents of the specified Data Memory are copied to the Accumulator. If the value is zero,

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 not 0 the

program proceeds with the following instruction.

Operation

ACC ← [m]

Skip if [m]=0

Affected flag(s)

None

SZ [m].i

Skip if bit i of Data Memory is 0

Description

If bit i of the specified Data Memory is 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 not 0, the program proceeds with the following instruction.

Operation

Skip if [m].i=0

Affected flag(s)

None

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