AT89C51AC2_05 Datasheet, PDF (13/29 Pages) ATMEL Corporation – 80C51 Microcontrollers

A/T89C51AC2 UART Bootloader
Flow Description: Blank Check Command
Host
Send Blank Check Command
Blank Check Command
Bootloader
Wait Blank Check Command
OR
Wait Checksum Error
COMMAND ABORTED
’X’ & CR & LF
OR ^{Wait COMMAND_OK}
COMMAND FINISHED
Wait Address not
erased
COMMAND FINISHED
’.’ & CR & LF
address & CR & LF
Checksum error
Send Checksum error
Flash blank
Send COMMAND_OK
Send first Address
not erased
Example
Blank Check ok
HOST
: 05 0000 04 0000 7FFF 01 78
BOOTLOADER : 05 0000 04 0000 7FFF 01 78 . CR LF
Blank Check ok at address xxxx
HOST
: 05 0000 04 0000 7FFF 01 78
BOOTLOADER : 05 0000 04 0000 7FFF 01 78 xxxx CR LF
Blank Check with checksum error
HOST
: 05 0000 04 0000 7FFF 01 70
BOOTLOADER : 05 0000 04 0000 7FFF 01 70 X CR LF CR LF
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4231C–CAN–03/05