at89c5131a ATMEL Corporation, at89c5131a Datasheet - Page 13

• Manufacturer Part Number: at89c5131a
• Description: Usb Microcontrollers
• Manufacturer: ATMEL Corporation

DFU Functional Descriptor
Table 5. DFU Functional Descriptor
Command Description
4287C–USB–11/04
Offset
0
1
2
3
5
wDetachTimeOut
bDescriptorType
wTransferSize
bmAttributes
bLength
Field
This protocol allows to:
•
•
•
•
•
•
•
Overview of the protocol is detailed in Appendix-A.
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
Size
1
1
1
2
2
Bit mask
Number
Number
Value
07h
21h
AT89C5131A USB Bootloader
Size of this descriptor, in bytes
DFU FUNCTIONAL descriptor type
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
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.
Maximum number of bytes that the device can accept per control-
write transaction
Description
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