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TS80C31X2-VCAR 데이터시트(PDF) 9 Page - ATMEL Corporation

부품명 TS80C31X2-VCAR
상세설명  8-bit CMOS Microcontroller ROMless
PDF  42 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

TS80C31X2-VCAR 데이터시트(HTML) 9 Page - ATMEL Corporation

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Rev. C - 15 January, 2001
9
TS80C31X2
6.2 Dual Data Pointer Register Ddptr
The additional data pointer can be used to speed up code execution and reduce code size in a number of
ways.
The dual DPTR structure is a way by which the chip will specify the address of an external data memory
location. There are two 16-bit DPTR registers that address the external memory, and a single bit called
DPS = AUXR1/bit0 (See Table 5.) that allows the program code to switch between them (Refer to Figure 3).
Figure 3. Use of Dual Pointer
External Data Memory
AUXR1(A2H)
DPS
DPH(83H) DPL(82H)
0
7
DPTR0
DPTR1



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