at89c51snd1 ATMEL Corporation, at89c51snd1 Datasheet - Page 13

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

Blank Check Example
Flow Description
Figure 8. Read Command Flow
4241B–MP3–07/04
COMMAND FINISHED
Wait Display Data
All Data Read
Send Display Command
OR
Host
OR
COMMAND ABORTED
Wait Checksum Error
COMMAND ABORTED
Wait Security Error
Blank Check ok at address xxxx
Blank Check ok
Blank Check with checksum error
BOOTLOADER
HOST
HOST
BOOTLOADER
BOOTLOADER
HOST
Display Command
"Reading value"
’X’ & CR & LF
’L’ & CR & LF
"Address = "
: 05 0000 04 0000 7FFF 01 78 xxxx CR LF
: 05 0000 04 0000 7FFF 01 78
: 05 0000 04 0000 7FFF 01 78
: 05 0000 04 0000 7FFF 01 78 . CR LF
: 05 0000 04 0000 7FFF 01 70 X CR LF CR LF
: 05 0000 04 0000 7FFF 01 70
CR & LF
AT89C51SND1 UART Bootloader
Send Checksum Error
Send Security Error
Complete Frame
Bootloader
Wait Display Command
COMMAND FINISHED
RD_WR_SECURITY
Send Display Data
Checksum Error
All Data Read
All Data Read
Read Data
13