INSTRUCTION DESCRIPTIONS

DO

Start Hardware Loop

Instruction Format:

DO

X:aa, expr

DO

Y:aa, expr

DO

Opcode:

 

23

20

19

16

15

8

7

0

 

 

 

 

 

 

 

 

 

 

0 0 0 0

0 1 1 0

0 0 a a

a a a a

0 S 0 0

0 0 0 0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ABSOLUTE ADDRESS EXTENSION

Instruction Fields:

ea=6-bit Effective Short Address=aaaaaa, expr=16-bit Absolute Address in 24-bit extension word

Absolute Short Address aaaaaa

Memory SpaceS

000000

X Memory

0

Y Memory

1

 

 

111111

Timing: 6+mv oscillator clock cycles

Memory: 2 program words

A - 94

INSTRUCTION SET DETAILS

MOTOROLA

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Image 363
Motorola 24-Bit Digital Signal Processor, DSP56000 manual Absolute Short Address aaaaaa Memory SpaceS