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AT89C51ED2-RDTIM データシート(PDF) 23 Page - ATMEL Corporation

部品番号 AT89C51ED2-RDTIM
部品情報  8-bit Flash Microcontroller
PDF  137 Pages
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メーカー  ATMEL [ATMEL Corporation]
ホームページ  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C51ED2-RDTIM データシート(HTML) 23 Page - ATMEL Corporation

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AT89C51RD2/ED2
4235E–8051–04/04
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 par-
ticular 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.



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