AT90USB64X 데이터 시트보기 (PDF) - Atmel Corporation

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AT90USB64X

USB DFU Bootloader Datasheet

Atmel Corporation 

8. Bootloader History

The following table shows the different bootloader revision and associated changes.

Table 8-1. USB Bootloader History

Product

AT90USB1287

AT90USB1286

AT90USB647

AT90USB646

AT90USB162

AT90USB82

ATmega32U4

ATmega16U4

Bootloader Revision

1.0.1

1.0.0

1.0.1

1.0.5

1.0.0

Changes

Initial Revision

Initial Revision

Allow to use 16MHz cristal with 3.3V power supply and

CKDIV8 fuse.

Improved USB autobaud process

Initial Revision

9. Appendix-A

Table 9-1. Summary of Frames from Host

Command Identifier data[0] data[1] data[2]

data[3]

data[4]

Description

Id_prog_start

01h

00h

start_address

01h

end_address

Init FLASH programming

Init EEPROM programming

Id_display_data

03h

00h

01h

start_address

02h

end_address

Display FLASH Data

Blank Check in FLASH

Display EEPROM Data

00h

FFh

Id_write_command

00h

04h

03h

01h

address

Full chip Erase (bits at FFh)

Hardware reset

LJMP address

00h

Read Bootloader Version

00h 01h

Read Device boot ID1

Id_read_command

05h

02h

01h 30h

31h

Read Device boot ID2

Read Manufacturer Code

Read Family Code

60h

Read Product Name

61h

Read Product Revision

Id_change _base

_address

06h

03h 00

“PP”

Select “PP” 64kBytes flash

page number

18

7618C–AVR–07/08

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