INSTRUCTION DESCRIPTIONS

BCHG

Bit Test and Change

Instruction Format:

BCHG #n,X:aa

BCHG #n,Y:aa

Opcode:

BCHG

 

23

16

15

8

7

0

 

 

 

 

 

 

 

 

 

0 0 0 0 1 0 1 1

0 0 a a

a a a a

 

0 S 0 b b b b b

 

 

 

 

 

 

 

 

 

Instruction Fields:

#n=bit number=bbbbb,

aa=6-bit Absolute Short Address=aaaaaa

Absolute Short Address aaaaaa

Memory SpaceS

Bit Number bbbbb

000000

X Memory

0

00000

Y Memory

1

 

 

10111

111111

 

 

 

Timing: 4+mvb oscillator clock cycles

Memory: 1+ea program words

A - 44

INSTRUCTION SET DETAILS

MOTOROLA

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