Motorola 24-Bit Digital Signal Processor, DSP56000 manual Jclr #n,Xea,xxxx Jclr #n,Yea,xxxx

INSTRUCTION DESCRIPTIONS

JCLR Jump if Bit Clear

Instruction Format:

JCLR #n,X:ea,xxxx

JCLR #n,Y:ea,xxxx

JCLR

Opcode:

23	16	15	8		7	0
0	0 0 0 1 0 1 0	0 1 M M M R R R		1 S 0 b b b b b
		ABSOLUTE ADDRESS EXTENSION

Instruction Fields:

#n=bit number=bbbbb,

ea=6-bit Effective Address=MMMRRR xxxx=16-bit Absolute Address in extension word

Effective
Addressing Mode	M M M R R R						Memory SpaceS		Bit Number bbbbb
(Rn)-Nn	0	0	0	r	r	r	X Memory	0	00000
(Rn)+Nn	0	0	1	r	r	r	Y Memory	1	•
(Rn)-	0	1	0	r	r	r			•
(Rn)+	0	1	1	r	r	r			•
(Rn)	1	0	0	r	r	r			10111
(Rn+Nn)	1	0	1	r	r	r
-(Rn)	1	1	1	r	r	r

where “rrr” refers to an address register R0-R7

Timing: 6+jx oscillator clock cycles

Memory: 2 program words

A - 112 INSTRUCTION SET DETAILS MOTOROLA