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AS8267 bảng dữ liệu(PDF) 98 Page - ams AG

tên linh kiện AS8267
Giải thích chi tiết về linh kiện  Single-Phase 2-Current Energy Measurement Integrated Circuits with Microcontroller, RTC, Programmable Multi-Purpose I/Os
PDF  136 Pages
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AS8267 bảng dữ liệu(HTML) 98 Page - ams AG

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Data Sheet AS8267 / AS8268
Revision 1.0, 19-Jun-07
Page 98 of 136
Memory Maps
The 8051 MCU is configured as Von Neumann architecture merging program and data range into one 64kB
address space. This space is completely accessible via MOVX and partly accessible via MOVC (0000h –
5FFFh). Besides, there is the typical 8051 structure with 128 bytes of internal memory (I_RAM) and the special
function registers (SFRs) also in a 128 byte address space.
SFRs
Direct addressing
FFh
80h
128 bytes
I_RAM
7Fh
00h
Internal Memory
unused
FFFFh
C000h
XDATA
Memory
Special
Function
Registers
unused
A000h
1kB X_RAM
32kB
FLASH
7FFFh
0000h
9000h
8000h
unused
9FFFh
MPIO
LCDD
DSP
SPI
RTC
SCT
9500h
9400h
9300h
9200h
9100h
9000h
Direct addressing
Register indirect
addressing
Register addressing
MOVX A, @DPTR
(4 banks)
MOVX @DPTR, A
Bit addressing
MOVC A, @A+PC
MOVC A, @A+DPTR
} only for 0000h – 7FFFh
MOVX @Ri, A
MOVXA, @Ri with Ri
ε {R0, R1},
P2 represents upper address bits
FLASH Memory
The Flash memory shares address and output data lines with the X_RAM. 32kB out of 64kB addressable
memory are used: 0000h – 7FFFh for program data storage.



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