at89c51snd1 ATMEL Corporation, at89c51snd1 Datasheet - Page 11

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

Flow Description
Figure 6. Programming Command
Programming Example
4241B–MP3–07/04
COMMAND FINISHED
Wait COMMAND_OK
Send Write Command
OR
Host
OR
COMMAND ABORTED
COMMAND ABORTED
Wait Checksum Error
Wait Security Error
Programming Data (write 55h at address 0010h in the Flash)
HOST
BOOTLOADER
Write Command
“X” & CR & LF
“P” & CR & LF
“.” & CR & LF
: 01 0010 00 55 9A
: 01 0010 00 55 9A . CR LF
AT89C51SND1 UART Bootloader
Send Checksum Error
Send Security Error
Bootloader
Wait Write Command
Send COMMAND_OK
Wait Programming
NO_SECURITY
Checksum Error
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