HT46R0664 datasheet(89/92 Pages) HOLTEK

89 / 92 page

Rev. 1.00

��st 1�� 011

Rev. 1.00

��st 1�� 011

HT46R0664

Enhanced A/D+LCD 8-Bit OTP MCU

S�btract Data Memory from �CC with res�lt in Data Memory

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

The res�lt is stored in the Data Memory. Note that if the res�lt of s�btraction 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.

[m] ← �CC ― [m]

OV� Z� �C� C

S�btract immediate data from �CC

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

�cc�m�lator. The res�lt is stored in the �cc�m�lator. Note that if the res�lt 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.

�CC ← �CC ― x

OV� Z� �C� C

Swap nibbles of Data Memory

The low-order and hi�h-order nibbles of the specified Data Memory are

interchan�ed.

[m].3~[m].0↔[m].7 ~ [m].4

None

Swap nibbles of Data Memory with res�lt in �CC

The low-order and hi�h-order nibbles of the specified Data Memory are

interchan�ed. The res�lt is stored in the �cc�m�lator. The contents of the Data

Memory remain �nchan�ed.

�CC.3 ~ �CC.0 ← [m].7 ~ [m].4

�CC.7 ~ �CC.4 ← [m].3 ~ [m].0

None

Skip if Data Memory is 0

If the contents of the specified Data Memory is 0� the followin� instr�ction is

skipped. �s this req�ires the insertion of a d�mmy instr�ction while the next

instr�ction is fetched� it is a two cycle instr�ction. If the res�lt is not 0 the pro�ram

proceeds with the followin� instr�ction.

Skip if [m] = 0

None

Skip if Data Memory is 0 with data movement to �CC

The contents of the specified Data Memory are copied to the Accumulator. If the

val�e is zero� the followin� instr�ction is skipped. �s this req�ires the insertion of a

d�mmy instr�ction while the next instr�ction is fetched� it is a two cycle instr�ction.

If the res�lt is not 0 the pro�ram proceeds with the followin� instr�ction.

�CC ← [m]

Skip if [m] = 0

None

SUBM A,[m]

Description

Operation

Affected flag(s)

SUB A,x

Description

Operation

Affected flag(s)

SWAP [m]

Description

Operation

Affected flag(s)

SWAPA [m]

Description

Operation

Affected flag(s)

SZ [m]

Description

Operation

Affected flag(s)

SZA [m]

Description

Operation

Affected flag(s)

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