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AT89C51AC2 датащи(PDF) 49 Page - ATMEL Corporation

номер детали AT89C51AC2
подробное описание детали  Enhanced 8-bit Microcontroller with 32 KB Flash Memory
PDF  121 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C51AC2 датащи(HTML) 49 Page - ATMEL Corporation

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49
A/T89C51AC2
4127G–8051–05/06
Figure 26. Hardware Boot Process Algorithm
Application
Programming Interface
Several Application Program Interface (API) calls are available for use by an application
program to permit selective erasing and programming of Flash pages. All calls are made
by functions.
All of these APIs are described in detail in the following documents on the Atmel web
site.
•
Datasheet Bootloader UART A/T89C51AC2
XROW Bytes
Table 32. XROW Mapping
RESET
Hardware
condition?
BLJB = = 0
?
bit ENBOOT in AUXR1 register
is initialized with BLJB inverted.
ENBOOT = 1
PC = F800h
ENBOOT = 1
PC = F800h
FCON = 00h
FCON = F0h
Boot Loader
in FM1
ENBOOT = 0
PC = 0000h
Yes
Yes
No
No
Application
in FM0
(Example, if BLJB=0, ENBOOT is set (=1) during reset,
thus the bootloader is executed after the reset)
Description
Default Value
Address
Copy of the Manufacturer Code
58h
30h
Copy of the Device ID#1: Family code
D7h
31h
Copy of the Device ID#2: Memories size and type
F7h
60h
Copy of the Device ID#3: Name and Revision
FFh
61h



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