HT46R0664 datasheet(83/92 Pages) HOLTEK

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Rev. 1.00

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Rev. 1.00

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HT46R0664

Enhanced A/D+LCD 8-Bit OTP MCU

Complement Data Memory

Each bit of the specified Data Memory is lo�ically complemented (1's

complement). Bits which previo�sly contained a 1 are chan�ed to 0 and vice

versa.

[m] ← [m]

Complement Data Memory with res�lt in �CC

Each bit of the specified Data Memory is lo�ically complemented (1's

complement). Bits which previo�sly contained a 1 are chan�ed to 0 and vice

versa. The complemented res�lt is stored in the �cc�m�lator and the contents of

the Data Memory remain �nchan�ed.

�CC ← [m]

Decimal-�dj�st �CC for addition with res�lt in Data Memory

Convert the contents of the �cc�m�lator val�e to a BCD ( Binary Coded Decimal)

val�e res�ltin� from the previo�s 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 �nchan�ed. If the hi�h nibble is �reater

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 addin� 00H� 06H� 60H or

66H depending on the Accumulator and flag conditions. Only the C flag may be

affected by this instr�ction which indicates that if the ori�inal BCD s�m is �reater

than 100� it allows m�ltiple precision decimal addition.

[m] ← �CC + 00H or

[m] ← �CC + 06H or

[m] ← �CC + 60H or

[m] ← �CC + 66H

Decrement Data Memory

Data in the specified Data Memory is decremented by 1.

[m] ← [m] ― 1

Decrement Data Memory with res�lt in �CC

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

the �cc�m�lator. The contents of the Data Memory remain �nchan�ed.

�CC ← [m] ― 1

CPL [m]

Description

Operation

Affected flag(s)

CPLA [m]

Description

Operation

Affected flag(s)

DAA [m]

Description

Operation

Affected flag(s)

DEC [m]

Description

Operation

Affected flag(s)

DECA [m]

Description

Operation

Affected flag(s)

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