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TSC80251G2D-L16CB 데이터시트(PDF) 11 Page - ATMEL Corporation

부품명 TSC80251G2D-L16CB
상세설명  8/16-bit Microcontroller with Serial Communication Interfaces
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
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AT/TSC8x251G2D
4135F–8051–11/06
Address Spaces
The TSC80251G2D derivatives implement four different address spaces:
On-chip ROM program/code memory (not present in ROMless devices)
On-chip RAM data memory
Special Function Registers (SFRs)
Configuration array
Program/Code Memory
The TSC83251G2D and TSC87251G2D implement 32 KB of on-chip program/code
memory. Figure 4 shows the split of the internal and external program/code memory
spaces. If EA# is tied to a high level, the 32-Kbyte on-chip program memory is mapped
in the lower part of segment FF: where the C251 core jumps after reset. The rest of the
program/code memory space is mapped to the external memory. If EA# is tied to a low
level, the internal program/code memory is not used and all the accesses are directed to
the external memory.
The TSC83251G2D products provide the internal program/code memory in a masked
ROM memory while the TSC87251G2D products provide it in an EPROM memory. For
the TSC80251G2D products, there is no internal program/code memory and EA# must
be tied to a low level.
Figure 4.
Program/Code Memory Mapping
Note:
Special care should be taken when the Program Counter (PC) increments:
If the program executes exclusively from on-chip code memory (not from external mem-
ory), beware of executing code from the upper eight bytes of the on-chip ROM
(FF:7FF8h-FF:7FFFh). Because of its pipeline capability, the TSC80251G2D derivative
may attempt to prefetch code from external memory (at an address above FF:7FFFh)
and thereby disrupt I/O Ports 0 and 2. Fetching code constants from these 8 bytes does
not affect Ports 0 and 2.
When PC reaches the end of segment FF:, it loops to the reset address FF:0000h (for
On-chip ROM/EPROM
Code Memory
Program/code
Segments
Program/code
External Memory Space
32 KB
EA# = 0
EA# = 1
32 KB
32 KB
Reserved
64 KB
128 KB
FF:FFFFh
FF:8000h
FF:7FFFh
FF:0000h
FE:FFFFh
FE:0000h
FD:FFFFh
01:FFFFh
01:0000h
02:0000h
00:FFFFh
00:0000h


유사한 부품 번호 - TSC80251G2D-L16CB

제조업체부품명데이터시트상세설명
logo
ATMEL Corporation
TSC80251G2D-L16CB ATMEL-TSC80251G2D-L16CB Datasheet
1Mb / 76P
   B/16-BIT MICROCONTROLLER WITH SERIAL COMMUNICATION INTERFACES
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유사한 설명 - TSC80251G2D-L16CB

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