參數(shù)資料
型號: AN1218
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: HC05 to HC08 Optimization
中文描述: 以HC08的優(yōu)化HC05
文件頁數(shù): 45/56頁
文件大?。?/td> 417K
代理商: AN1218
Application Note
Appendix F — CPU05 and CPU08 Data Movement Code
AN1218 Rev. 2
45
LDA TBL,X ;5,3 A
(TBL+X)
STA PORTADR ;4,2 (PORTADR)
(A)
INCX ;3,1 X
X + 1
LDA TBL,X ;5,3 A
(TBL+X)
STA PORTBDR ;4,2 (PORTBDR)
(A)
INCX ;3,1 X
X + 1
LDA TBL,X ;5,3 A
(TBL+X)
STA SPICTRL ;4,2 (SPICTRL)
(A)
INCX ;3,1 X
X + 1
LDA TBL,X ;5,3 A
(TBL+X)
STA SCICTRL ;4,2 (SCICTRL)
(A)
INCX ;3,1 X
X + 1
LDA TBL,X ;5,3 A
(TBL+X)
STA TIMCTRL ;4,2 (TIMCTRL)
(A)
* Total # CPU05 cycles = 64
* Total # bytes = 34
*********************************
*********************************
* HC08 code *
START08 LDHX #TBL ;3,3 H:X
TBL
LDA PORTD ;3,2 A
(PORTD)
AND #$08 ;2,2 clear A except bit 3
; A = 0 or 8
TAX ;1,1 X
(A)
; set the offset of X
MOV X+,PORTADR ;4,2 (PORTADR)
(H:X)
; X
X + 1
MOV X+,PORTBDR ;4,2 (PORTBDR)
(H:X)
; X
X + 1
MOV X+,SPICTRL ;4,2 (SPICTRL)
(H:X)
; X
X + 1
MOV X+,SCICTRL ;4,2 (SCICTRL)
(H:X)
; X
X + 1
MOV X+,TIMCTRL ;4,2 (TIMCTRL)
(H:X)
; X
X + 1
* Total # CPU08 cycles = 29
* Total # bytes = 18
*********************************
DONE NOP
BRA DONE
***** Initialize the reset vector
ORG $FFFE
DW START05
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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