at89c51ic2-slsim ATMEL Corporation, at89c51ic2-slsim Datasheet - Page 115
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at89c51ic2-slsim
Manufacturer Part Number
at89c51ic2-slsim
Description
At89c51ic2 8-bit Flash Microcontroller With 2-wire Interface
Manufacturer
ATMEL Corporation
Datasheet
1.AT89C51IC2-SLSIM.pdf
(147 pages)
- Current page: 115 of 147
- Download datasheet (2Mb)
Boot Process
Figure 46. Bootloader process
4301D–8051–02/08
USER APPLICATION
PC = 0000h
ENBOOT = 0
BLJB = 1
USER BOOT LOADER
PC= [SBV]00h
BSB = 00h
SBV = FCh
FCON = 00h
Condition?
Hardware
BLJB!= 0
RESET
?
?
?
?
F800h
If BLJB = 0 then ENBOOT bit (AUXR1) is set
BLJB = 0
ENBOOT = 1
FCON = F0h
Yes (PSEN = 0, EA = 1, and ALE = 1 or not connected)
FCON = 00h
yes = hardware boot
else ENBOOT bit (AUXR1) is cleared
Atmel BOOT LOADER
conditions
115
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