at89c51rc2-slsil ATMEL Corporation, at89c51rc2-slsil Datasheet - Page 94
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at89c51rc2-slsil
Manufacturer Part Number
at89c51rc2-slsil
Description
8-bit Microcontroller With 16k/ 32k Bytes Flash
Manufacturer
ATMEL Corporation
Datasheet
1.AT89C51RC2-SLSIL.pdf
(127 pages)
- Current page: 94 of 127
- Download datasheet (2Mb)
Boot Process
Figure 39. Bootloader process
94
AT89C51RB2/RC2
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
4180E–8051–10/06
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