Datasheet

122
AT89C51IC2
4301D–8051–02/08
Blank Check Command
Description
Figure 50. Blank Check Flow
Example
Host
Bootloader
Blank Check Command
’X’ & CR & LF
Flash blank
Wait Blank Check Command
Send first Address
Send COMMAND_OK
Send Blank Check Command
Wait Checksum Error
Wait Address not
erased
Wait COMMAND_OK
OR
COMMAND ABORTED
COMMAND FINISHED
Send Checksum error
COMMAND FINISHED
’.’ & CR & LF
OR
address & CR & LF
not erased
Checksum error
HOST : 05 0000 04 0000 7FFF 01 78
BOOTLOADER : 05 0000 04 0000 7FFF 01 78 . CR LF
Blank Check ok
BOOTLOADER : 05 0000 04 0000 7FFF 01 70 X CR LF CR LF
Blank Check with checksum error
HOST : 05 0000 04 0000 7FFF 01 70
BOOTLOADER : 05 0000 04 0000 7FFF 01 78 xxxx CR LF
Blank Check ko at address xxxx
HOST : 05 0000 04 0000 7FFF 01 78