參數(shù)資料
型號： TS80C51RA2-LIKD
廠商： Atmel Corp.
英文描述： High Performance 8-bit Microcontrollers
中文描述： 高性能8位微控制器
文件頁數(shù)： 15/74頁
文件大小： 903K
代理商： TS80C51RA2-LIKD
Rev. C - 06 March, 2001
15
TS80C51RA2/RD2
TS83C51RB2/RC2/RD2
TS87C51RB2/RC2/RD2
ASSEMBLY LANGUAGE
; Block move using dual data pointers
; Destroys DPTR0, DPTR1, A and PSW
; note: DPS exits opposite of entry state
; unless an extra INC AUXR1 is added
;
00A2
AUXR1 EQU 0A2H
;
0000 909000
MOV DPTR,#SOURCE
0003 05A2
INC
0005 90A000
MOV DPTR,#DEST
0008
LOOP:
0008 05A2
INC
000A E0
MOVX A,@DPTR
000B A3
INC
000C 05A2
INC
000E F0
MOVX @DPTR,A
000F A3
INC
0010 70F6
JNZ
0012 05A2
INC
; address of SOURCE
; switch data pointers
; address of DEST
AUXR1
AUXR1
; switch data pointers
; get a byte from SOURCE
; increment SOURCE address
; switch data pointers
; write the byte to DEST
; increment DEST address
; check for 0 terminator
; (optional) restore DPS
DPTR
AUXR1
DPTR
LOOP
AUXR1
INC is a short (2 bytes) and fast (12 clocks) way to manipulate the DPS bit in the AUXR1 SFR. However,
note that the INC instruction does not directly force the DPS bit to a particular state, but simply toggles it.
In simple routines, such as the block move example, only the fact that DPS is toggled in the proper sequence
matters, not its actual value. In other words, the block move routine works the same whether DPS is '0' or '1'
on entry. Observe that without the last instruction (INC AUXR1), the routine will exit with DPS in the
opposite state.
相關PDF資料
PDF描述
TS80C51RA2-LIKR High Performance 8-bit Microcontrollers
TS80C51RA2-LILB High Performance 8-bit Microcontrollers
TS80C51RA2-LILD High Performance 8-bit Microcontrollers
TS80C51RA2-LILR High Performance 8-bit Microcontrollers
TS80C51RA2-LIMB High Performance 8-bit Microcontrollers
相關代理商/技術參數(shù)
參數(shù)描述
TS80C51RA2-LIKR 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers
TS80C51RA2-LILB 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers
TS80C51RA2-LILD 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers
TS80C51RA2-LILR 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers
TS80C51RA2-LIMB 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers
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