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UPSD3422 データシート(PDF) 49 Page - STMicroelectronics

部品番号 UPSD3422
部品情報  Turbo Plus Series Fast Turbo 8032 MCU with USB and Programmable Logic
PDF  293 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UPSD3422 データシート(HTML) 49 Page - STMicroelectronics

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Dual data pointers
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Note:
1
The code loop where the data transfer takes place is only 3 lines of code.
LOOP:
MOVX(1)
A, @DPTR
; load XDATA byte from source into ACC.
; after load completes, DPTR0 increments and
DPTR
; switches DPTR1
MOVX(1)
@DPTR, A
; store XDATA byte from ACC to destination.
; after store completes, DPTR1 increments and
DPTR
; switches to DPTR0
DJNZ(1)
R7, LOOP
; continue until done
MOV
86h, #00
; disable auto-increment
MOV
85h, #00
; disable auto-toggle, now back to single DPTR
mode



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