AT89C51RB2/RC2
Example
Display data from address 0000h to 0020h
HOST
: 05 0000 04 0000 0020 00 D7
BOOTLOADER
BOOTLOADER
BOOTLOADER
BOOTLOADER
: 05 0000 04 0000 0020 00 D7
0000=-----data------ CR LF
0010=-----data------ CR LF
0020=data CR LF
(16 data)
(16 data)
( 1 data)
Read Function
This flow is similar for the following frames:
•
•
Reading Frame
EOF Frame/Atmel Frame (only reading Atmel Frame)
Description
Figure 45. Read Flow
Bootloader
Host
Read Command
’X’ & CR & LF
Send Read Command
Wait Read Command
OR
Checksum error
Wait Checksum Error
COMMAND ABORTED
Send Checksum error
RD_WR_SECURITY
OR
’L’ & CR & LF
Wait Security Error
Send Security error
COMMAND ABORTED
Read Value
’value’ & ’.’ & CR & LF
Wait Value of Data
Send Data Read
COMMAND FINISHED
Example
Read function (read SBV)
HOST
: 02 0000 05 07 02 F0
: 02 0000 05 07 02 F0 Value . CR LF
BOOTLOADER
Atmel Read function (read Bootloader version)
HOST
: 02 0000 01 02 00 FB
BOOTLOADER
: 02 0000 01 02 00 FB Value . CR LF
103
4180E–8051–10/06
ATMEL [ ATMEL ]
