HT82B42R datasheet(73/86 Pages) HOLTEK

73 / 86 page

Rev. 1.00

October 27, 2011

Rev. 1.00

October 27, 2011

HT82B42R/HT82B42RE

I/O MCU with USB Interface

Complement Data Memory

Each bit of the specified Data Memory is logically complemented (1's

complement). Bits which previously contained a 1 are changed to 0 and vice

versa.

[m] ← [m]

Complement Data Memory with result in ACC

Each bit of the specified Data Memory is logically complemented (1's

complement). Bits which previously contained a 1 are changed to 0 and vice

versa. The complemented result is stored in the Accumulator and the contents of

the Data Memory remain unchanged.

ACC ← [m]

Decimal-Adjust ACC for addition with result in Data Memory

Convert the contents of the Accumulator value to a BCD ( Binary Coded Decimal)

value resulting from the previous 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 unchanged. If the high nibble is greater

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 adding 00H, 06H, 60H or

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

affected by this instruction which indicates that if the original BCD sum is greater

than 100, it allows multiple precision decimal addition.

[m] ← ACC + 00H or

[m] ← ACC + 06H or

[m] ← ACC + 60H or

[m] ← ACC + 66H

Decrement Data Memory

Data in the specified Data Memory is decremented by 1.

[m] ← [m] ― 1

Decrement Data Memory with result in ACC

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

the Accumulator. The contents of the Data Memory remain unchanged.

ACC ← [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)

HT82B42R Datasheet(PDF) 73 Page - Holtek Semiconductor Inc

HT82B42R Datasheet(HTML) 73 Page - Holtek Semiconductor Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86

Datasheet Download

Link URL