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AT89C51CC03U-RDTIM bảng dữ liệu(PDF) 23 Page - ATMEL Corporation

tên linh kiện AT89C51CC03U-RDTIM
Giải thích chi tiết về linh kiện  Enhanced 8-bit MCU with CAN Controller and Flash Memory
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nhà sản xuất  ATMEL [ATMEL Corporation]
Trang chủ  http://www.atmel.com
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AT89C51CC03U-RDTIM bảng dữ liệu(HTML) 23 Page - ATMEL Corporation

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AT89C51CC03
4182I–CAN–06/05
Data Memory
The AT89C51CC03 provides data memory access in two different spaces:
1. The internal space mapped in three separate segments:
•
the lower 128 Bytes RAM segment.
•
the upper 128 Bytes RAM segment.
•
the expanded 2048 Bytes RAM segment (ERAM).
2. The external space.
A fourth internal segment is available but dedicated to Special Function Registers,
SFRs, (addresses 80h to FFh) accessible by direct addressing mode.
Figure 8 shows the internal and external data memory spaces organization.
Figure 7. Internal Memory - RAM
Figure 8. Internal and External Data Memory Organization ERAM-XRAM
Upper
128 Bytes
Internal RAM
Lower
128 Bytes
Internal RAM
Special
Function
Registers
80h
80h
00h
FFh
FFh
direct addressing
addressing
7Fh
direct or indirect
indirect addressing
256 up to 2048 Bytes
00h
64K Bytes
External XRAM
0000h
FFFFh
Internal ERAM
EXTRAM = 0
EXTRAM = 1
FFh or 7FFh
Internal
External



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