AT89C51RC2-3CSCM View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT89C51RC2-3CSCM

8-bit Microcontroller with 16K/32K Bytes Flash

Atmel Corporation 

Boot Process

Figure 39. Bootloader process

RESET

If BLJB = 0 then ENBOOT bit (AUXR1) is set

else ENBOOT bit (AUXR1) is cleared

Yes (PSEN = 0, EA = 1, and ALE = 1 or not connected)

Hardware

Condition?

FCON = 00h

FCON = F0h

BLJB = 1 BLJB!= 0

ENBOOT = 0 ?

BLJB = 0

ENBOOT = 1

F800h

FCON = 00h

?

yes = hardware boot conditions

PC = 0000h

USER APPLICATION

BSB = 00h

?

SBV = FCh

?

USER BOOT LOADER

PC= [SBV]00h

Atmel BOOT LOADER

94 AT89C51RB2/RC2

4180E–8051–10/06

Share Link: