AT90USB128X データシートの表示（PDF） - Atmel Corporation

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AT90USB128X

USB DFU Bootloader Datasheet

Atmel Corporation 

4.7.1

First Request from Host

The Host sends a DFU Download request with a Display command in the data field.

SETUP

OUT

IN

DFU_DNLOAD

Display_Data (6 bytes)

ZLP

Command Identifier

Id_display_data

03h

data[0]

00h

01h

02h

data[1] data[2]

start_address

data[3]

data[4]

end_address

Description

Display FLASH Data

Blank Check in FLASH

Display EEPROM Data

4.7.2

4.7.3

Second Request from Host

The Host sends a DFU Upload request.

Answers from the Device

The device sends to the Host the firmware from the specified start address to the specified end

address.

SETUP

IN

IN

DFU_UPLOAD

Firmware Packet 1

Firmware Packet 2

IN

OUT

Firmware Packet n

ZLP

11

7618C–AVR–07/08

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