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AT89C51RC2-3CSIM Datasheet(PDF) 94 Page - ATMEL Corporation

Part # AT89C51RC2-3CSIM
Description  Microcontroller with 16K/32K Bytes Flash
PDF  127 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C51RC2-3CSIM Datasheet(HTML) 94 Page - ATMEL Corporation

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AT89C51RB2/RC2
4180C–8051–12/03
Boot Process
Figure 39. Bootloader process
RESET
Hardware
Condition?
BLJB!= 0
?
USER APPLICATION
FCON = 00h
FCON = F0h
FCON = 00h
?
Atmel BOOT LOADER
USER BOOT LOADER
yes = hardware boot
F800h
BLJB = 1
BSB = 00h
?
SBV = FCh
?
PC = 0000h
PC= [SBV]00h
conditions
BLJB = 0
If BLJB = 0 then ENBOOT bit (AUXR1) is set
else ENBOOT bit (AUXR1) is cleared
ENBOOT = 1
ENBOOT = 0
Yes (PSEN = 0, EA = 1, and ALE = 1 or not connected)



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