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Individual Instruction Descriptions
4-145
Assembly Language Instructions
4.14.50
NOTAC
One’s Complement Negation of Accumulator
Syntax
[label]
name
dest, src [, mod]
Clock, clk
Word, w
With RPT, clk
Class
NOTAC
An[~], An[~] [, next A]
1
1
n
R
+3
3
Execution
[premodify AP if mod specified]
dest
⇐
NOT src
PC
⇐
PC + 1
Flags Affected
OF, SF, ZF, CF are set accordingly
Opcode
Instructions
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
NOTAC An[~], An[~] [, next A]
1
1
1
0
0
next A
An
0
0
0
0
1
0
A~
~A
Description
Premodify accumulator pointer if specified. Perform one’s complement of src
accumulator and store result in dest accumulator.
See Also
NOTACS, AND, ANDB, ANDS, OR, ORB, ORS, XOR, XORB, XORS,
NEGAC, NEGACS
Example 4.14.50.1
NOTAC A3~, A3, ––A
Predecrement accumulator pointer AP3. One’s complement (invert bits) accumulator A3 and put result
in accumulator A3~.
Summary of Contents for MSP50C6xx
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