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AT89C51RC2-3CSIM Fiches technique(PDF) 94 Page - ATMEL Corporation |
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AT89C51RC2-3CSIM Fiches technique(HTML) 94 Page - ATMEL Corporation |
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94 / 127 page ![]() 94 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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