DSP56362P datasheet(117/152 Pages) FREESCALE

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DSP56362 Technical Data, Rev. 4

Freescale Semiconductor

A-1

Appendix A Power Consumption Benchmark

The following benchmark program permits evaluation of DSP power usage in a test situation. It enables

the PLL, disables the external clock, and uses repeated multiply-accumulate instructions with a set of

synthetic DSP application data to emulate intensive sustained DSP operation.

;********************************************************************;*********

***********************************************************

;* ;* CHECKS

Typical Power Consumption

;********************************************************************

page

200,55,0,0,0

nolist

I_VEC EQU $000000

; Interrupt vectors for program debug only

START EQU $8000

; MAIN (external) program starting address

INT_PROG

EQU $100 ; INTERNAL program memory starting address

INT_XDAT

EQU $0

; INTERNAL X-data memory starting address

INT_YDAT

EQU $0

; INTERNAL Y-data memory starting address

INCLUDE "ioequ.asm"

INCLUDE "intequ.asm"

list

org

P:START

;

movep #$0123FF,x:M_BCR; BCR: Area 3 : 1 w.s (SRAM)

; Default: 1 w.s (SRAM)

;

movep

#$0d0000,x:M_PCTL

; XTAL disable

; PLL enable

; CLKOUT disable

;

; Load the program

;

move

#INT_PROG,r0

move

#PROG_START,r1

#(PROG_END-PROG_START),PLOAD_LOOP

move

p:(r1)+,x0

move

x0,p:(r0)+

nop

PLOAD_LOOP

;

; Load the X-data

;

move

#INT_XDAT,r0

move

#XDAT_START,r1

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