at89c51snd1 ATMEL Corporation, at89c51snd1 Datasheet - Page 7

• Manufacturer Part Number: at89c51snd1
• Description: Mp3 Microcontrollers
• Manufacturer: ATMEL Corporation

Regular Boot Process
4241B–MP3–07/04
Figure 3. Boot Process Algorithm
Standard Init
Application
ENBOOT = 0
FCON = F0h
PC = 0000h
User’s
AT89C51SND1 UART Bootloader
Prog Cond Init
FCON = 00h?
Bootloader
ENBOOT = 1
Hard Cond?
Prog Cond?
FCON = F0h
User Boot?
SBV < F0h?
PC = F000h
Hard Init?
BLJB = P?
ISP# = L?
RESET
User’s
Hard Cond Init
Bootloader
ENBOOT = 1
FCON = 00h
PC = F000h
Atmel’s
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