ADE7569 datasheet(87/144 Pages) AD

87 / 144 page

ADE7566/ADE7569/ADE7166/ADE7169

Rev. A | Page 87 of 144

SUBB A, Source

This instruction subtracts the source byte and the carry

(borrow) flag from the accumulator. It references the carry

(borrow) status flag.

Affected Status Flags

Set if there is a borrow needed for Bit 7. Cleared

otherwise. Used to indicate an overflow if the

operands are unsigned.

Set if there is a borrow needed for Bit 6 or Bit 7, but

not for both. Used to indicate an overflow for signed

subtraction. This flag is set if a negative number

subtracted from a positive yields a negative result or

if a positive number subtracted from a negative

number yields a positive result.

Set if a borrow is needed for Bit 3. Cleared otherwise.

MUL AB

This instruction multiplies the accumulator by the B register.

This operation is unsigned. The lower byte of the 16-bit product

is stored in the accumulator and the higher byte is left in the B

Affected Status Flags

Cleared

Set if the result is greater than 255. Cleared otherwise.

DIV AB

This instruction divides the accumulator by the B register. This

operation is unsigned. The integer part of the quotient is stored

in the accumulator and the remainder goes into the B register.

No status flags are referenced by the instruction.

Affected Status Flags

Cleared

Cleared unless the B register is equal to 0, in which

case the results of the division are undefined and the

OV flag is set.

DA A

This instruction adjusts the accumulator to hold two 4-bit digits

after the addition of two binary coded decimals (BCDs) with

the ADD or ADDC instructions. If the AC bit is set or if the value

of Bit 0 to Bit 3 exceeds nine, 0x06 is added to the accumulator

to correct the lower four bits. If the carry bit is set when the

instruction begins, or if 0x06 is added to the accumulator in the

first step, 0x60 is added to the accumulator to correct the higher

four bits.

The carry and AC status flags are referenced by this instruction.

Affected Status Flag

Set if the result is greater than 0x99. Cleared otherwise.

RRC A

This instruction rotates the accumulator to the right through

the carry flag. The old LSB of the accumulator becomes the new

carry flag, and the old carry flag is loaded into the new MSB of

the accumulator.

The carry status flag is referenced by this instruction.

Affected Status Flag

Equal to the state of ACC.0 before execution of the

instruction.

RLC A

This instruction rotates the accumulator to the left through the

carry flag. The old MSB of the accumulator becomes the new

carry flag, and the old carry flag is loaded into the new LSB of

the accumulator.

The carry status flag is referenced by this instruction.

Affected Status Flag

Equal to the state of ACC.7 before execution of the

instruction.

CJNE Destination, Source, Relative Jump

This instruction compares the source value to the destination

value and branches to the location set by the relative jump if

they are not equal. If the values are equal, program execution

continues with the instruction after the CJNE instruction.

No status flags are referenced by this instruction.

Affected Status Flag

Set if the source value is greater than the destination

value. Cleared otherwise.

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ADE7569 数据表(PDF) 87 Page - Analog Devices

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