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TMS320F Datasheet(PDF) 98 Page - Texas Instruments

Part # TMS320F
Description  CPU and Instruction Set
PDF  389 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMS320F Datasheet(HTML) 98 Page - Texas Instruments

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Indirect Addressing Mode
6-14
6.3.5
Examples of Indirect Addressing
Example 6–7 illustrates how the instruction register is loaded with the value
shown when the ADD instruction is fetched from program memory.
Example 6–7. Indirect Addressing—No Increment or Decrement
ADD *,8
;Add to the accumulator the content of the
;data-memory address referenced by the
;current auxiliary register. The data
;is left shifted 8 bits before being added.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
N = No next AR specified
ARU = No operation on current AR
1
Shift = 8
00
0
0
XX
X
ADD opcode
0
0
1
0
100
0
Addressing mode = indirect
NAR = don’t cares
Example 6–8, illustrates how the instruction register is loaded with the value
shown when the ADD instruction is fetched from program memory.
Example 6–8. Indirect Addressing—Increment by 1
ADD *+,8,AR4
;Operates as in Example 6–7, but
;in addition, the current auxiliary
;register is incremented by one, and
;AR4 is chosen as the next auxiliary
;register.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
NAR = 4
N = next AR specified
ARU = increment current AR by 1
1
Shift = 8
01
0
0
10
0
ADD opcode
0
0
1
010
0
0
Addressing mode = indirect



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