AT89C5131A(2004) View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT89C5131A
(Rev.:2004)

USB Microcontrollers

Atmel Corporation 

AT89C5131A USB Bootloader

DFU Functional Descriptor

Table 5. DFU Functional Descriptor

Offset

Field

0

bLength

1

bDescriptorType

2

bmAttributes

3

wDetachTimeOut

5

wTransferSize

Size

1

1

1

2

2

Value

Description

07h Size of this descriptor, in bytes

21h DFU FUNCTIONAL descriptor type

Bit mask

DFU Attributes:

bit 7..3: reserved

bit 2: device is able to communicate via USB after Manifestation

phase 1 = yes, 0 = no, must see bus reset

bit 1: bitCanUpload : upload capable 1 = yes, 0 = no

bit 0: bitCanDnload : download capable 1 = yes, 0 = no

Number

Time in milliseconds that the device will wait after receipt of the

DFU_DETACH request.

If this time elapses without a USB reset, the device will terminate the

Reconfiguration phase and revert back to normal operation. This

represents the maximum time that the device can wait (depending on

its timers, ...). The Host may specify a shorter timeout in the

DFU_DETACH request.

Number

Maximum number of bytes that the device can accept per control-

write transaction

Command Description

This protocol allows to:

• Initiate the communication

• Program the Flash or EEPROM Data

• Read the Flash or EEPROM Data

• Program Configuration Information

• Read Configuration and Manufacturer Information

• Erase the Flash

• Start the application

Overview of the protocol is detailed in Appendix-A.

13

4287C–USB–11/04

Share Link: