INSTRUCTION DESCRIPTIONS

BTST

Bit Test

Instruction Format:

BTST #n,X:pp

BTST #n,Y:pp

Opcode:

BTST

 

23

16

15

8

7

0

 

 

 

 

 

 

 

 

0 0 0 0 1 0 1 1

1 0 p p

p p p p

 

0 S 1 b b b b b

 

 

 

 

 

 

 

 

Instruction Fields:

#n=bit number=bbbbb,

ea=6-bit I/O Short Address=pppppp

I/O Short Address pppppp

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 - 68

INSTRUCTION SET DETAILS

MOTOROLA

Page 337
Image 337
Motorola 24-Bit Digital Signal Processor, DSP56000 manual Btst #n,Xpp Btst #n,Ypp