T89C51RD2-3CSCL ATMEL [ATMEL Corporation], T89C51RD2-3CSCL Datasheet - Page 62

• Manufacturer Part Number: T89C51RD2-3CSCL
• Description: 0 to 40 MHz Flash Programmable 8-bit Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

Boot Process
Figure 24. Bootloader Process
62
T89C51RD2
User Application
JUMP to 0000h
BSB=0
Yes
User Boot Loader
JUMP to FC03h
JUMP to XX00h
BSB = 00h
SBV = FCh
Condition?
BLJB = 1
Hardware
RESET
?
?
?
SBV=XXh
SBV=FCh
Yes (PSEN = 0, EA = 1,
and ALE = 1 or not connected)
Default Boot Loader
JUMP to FC00h
4243G–8051–05/03