AT89C51SND1_06 ATMEL [ATMEL Corporation], AT89C51SND1_06 Datasheet - Page 20

• Manufacturer Part Number: AT89C51SND1_06
• Description: USB Microcontrollers
• Manufacturer: ATMEL [ATMEL Corporation]

Second Request from
Host
Answers from the
Device
Answers from the
Device to a Blank Check
Command
20
AT89C51SND1
The Host sends a DFU Upload request.
The device send to the Host the firmware from the specified start address to the end address.
The Host controller send a GET_STATUS request to the device. Once internal blank check has
been completed, the device sends its status.
•
•
Command Identifier
Id_display_data
If the device status is “OK”:
the device memory is then blank and the device waits the next Host request.
If the device status is “errCHECK_ERASED”:
the device memory is not blank. The device waits for an DFU_UPLOAD request to send the
first address where the byte is not 0xFF.
OUT
SETUP
IN
IN
IN
03h
data[0]
00h
01h
ZLP
DFU_UPLOAD
Firmware Packet 1
Firmware Packet 2
Firmware Packet n
data[1]
start_address
data[2]
data[3]
end_address
data[4]
Display Flash Data
Blank Check in Flash
Description
4254C–MP3–03/06