at89c51snd1 ATMEL Corporation, at89c51snd1 Datasheet - Page 15

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

Figure 9. Write Command Flow
Program Configuration 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 Atmel function (write SSB to level 2)
Writing Frame (write BSB to 55h)
HOST
BOOTLOADER
HOST
BOOTLOADER
Write Command
“X” & CR & LF
“P” & CR & LF
“.” & CR & LF
: 02 0000 03 05 01 F5
: 02 0000 03 05 01 F5. CR LF
: 03 0000 03 06 00 55 9F
: 03 0000 03 06 00 55 9F . 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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