DP80390 datasheet(17/84 Pages) DCD

17 / 84 page

DP80390 Instructions set details

- 17 -

All trademarks mentioned in this document

http://www.DigitalCoreDesign.com

are trademarks of their respective owners.

http://www.dcd.pl

3.2.

ADD

Instruction:

ADD A, <src-byte>

Function:

Adds A to the source operand and returns the result to A.

Description:

ADD adds the byte variable indicated to the accumulator, leaving the

result in the accumulator. The carry and auxiliary carry flags are set,

respectively, if there is a carry out of bit 7 or bit 3, and cleared

otherwise. When adding unsigned integers, the carry flag indicates an

overflow occurred. OV is set if there is a carry out of bit 6 but not out of

bit 7, or a carry out of bit 7 but not out of bit 6; otherwise OV is cleared.

When adding signed integers, OV indicates a negative number

produced as the sum of two positive operands, or a positive sum from

two negative operands. Four source operand addressing modes are

allowed: register, direct, register- indirect, or immediate.

3.2.1. ADD A, RN

Operation:

(PC)

← (PC) + 1

(A)

← (A) + (Rn)

Bytes:

Cycles:

Encoding:

3.2.2. ADD A, DIRECT

Operation:

(PC)

← (PC) + 2

(A)

← (A) + (direct)

Bytes:

Cycles:

Encoding:

direct address

DP80390 Arkusz danych(PDF) 17 Page - Digital Core Design

DP80390 Arkusz danych(HTML) 17 Page - Digital Core Design

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

Arkusz danych Pobierz

Link URL