Datasheet

107
4235K–8051–05/08
AT89C51RD2/ED2
24.9.5.1 Example
24.9.6 Blank Check Command Description
Figure 24-10. Blank Check Flow
HOST : 01 0010 00 55 9A
BOOTLOADER : 01 0010 00 55 9A . CR LF
Programming Data (write 55h at address 0010h in the Flash)
HOST : 02 0000 03 05 01 F5
BOOTLOADER : 02 0000 03 05 01 F5. CR LF
Programming Atmel function (write SSB to level 2)
HOST : 03 0000 03 06 00 55 9F
BOOTLOADER : 03 0000 03 06 00 55 9F . CR LF
Writing Frame (write BSB to 55h)
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