AN1218 datasheet(50/56 Pages) FREESCALE

Nome de Peças	AN1218

Descrição Electrónicos	HC05 to HC08 Optimization

PDF	56 Pages

Scroll/Zoom	100%

Fabricante Electrônico	FREESCALE [Freescale Semiconductor, Inc]

Página de início	http://www.freescale.com

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50 / 56 page

Application Note

AN1218 Rev. 2

HC05 code

SRCH

LDX

TBL_LEN

;3,2 X

← (TBL_LEN)

LOOP3

LDA

TABLE-1,X

;5,3 A

← (TABLE-1+X)

CMP

#$FF

;2,2 (A) - $FF

BEQ

;3,2 if Z=1, then goto NEXT

;

this signifies that a

;

saturation value has been

;

found in the table

DECX

;3,1 X

← X -1

BNE

LOOP3

;3,2 if Z=0, then goto LOOP3

;

go look at another value

;

in the table

Total # CPU05 cycles

= 19

Total # bytes

= 12

HC08 code

LDX

TBL_LEN

;3,2 X

← (TBL_LEN)

LOOP4

LDA

TABLE-1,X

;4,3 A

← (TABLE-1+X)

CBEQA

#$FF,DONE

;4,3 (A) - $FF

;

if Z=1, then goto DONE

;

this signifies that a

;

saturation value has been

;

found in the table

DBNZX

LOOP4

;3,2 X

← X -1

;

if Z=0, then goto LOOP4

;

go look at another value

;

in the table

Total # CPU08 cycles

= 14

Total # bytes

= 10

DONE

NOP

BRA

DONE

*****

Initialize the reset vector

ORG

$FFFE

SRCH

Freescale Semiconductor, Inc.

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