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AT90USB82 Datasheet(PDF) 7 Page - ATMEL Corporation

Part # AT90USB82
Description  USB DFU Bootloader
Download  28 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90USB82 Datasheet(HTML) 7 Page - ATMEL Corporation

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7
7618C–AVR–07/08
Table 4-6.
bState Values
4.5.2
Clear Status
Each time the device detects and reports an error indication status to the host in response to a
DFU_GETSTATUS request, it enters the dfuERROR state. After reporting any error status, the
device can not leave the dfuERROR state, until it has received a DFU_CLRSTATUS request.
Upon receipt of DFU_CLRSTATUS, the device sets status to OK and move to the dfuIDLE state.
Once the device is in the dfuIDLE state it is then able to move to other states.
errVENDOR
0x0B
iString indicates a vendor-specific error
errUSBR
0x0C
Device detected unexpected USB reset signaling
errPOR
0x0D
Device detected unexpected power on reset
errUNKNOWN
0x0E
Something went wrong, but the device does not know what it was
errSTALLEDPK
0x0F
Device stalled an unexpected request
State
Value
Description
appIDLE
0
Device is running its normal application
appDETACH
1
Device is running its normal application, has received the DFU_DETACH
request, and is waiting for a USB reset
dfuIDLE
2
Device is operating in the DFU mode and is waiting for requests
dfuDNLOAD-SYNC
3
Device has received a block and is waiting for the Host to solicit the status via
DFU_GETSTATUS
dfuDNBUSY
4
Device is programming a control-write block into its non volatile memories
dfuDNLOAD-IDLE
5
Device is processing a download operation. Expecting DFU_DNLOAD requests
dfuMANIFEST-SYNC
6
Device has received the final block of firmware from the Host and is waiting for
receipt of DFU_GETSTATUS to begin the Manifestation phase
or
device has completed the Manifestation phase and is waiting for receipt of
DFU_GETSTATUS.
dfuMANIFEST
7
Device is in the Manifestation phase.
dfuMANIFEST-WAIT-
RESET
8
Device has programmed its memories and is waiting for a USB reset or a power
on reset.
dfuUPLOAD-IDLE
9
The device is processing an upload operation. Expecting DFU_UPLOAD
requests.
dfuERROR
10
An error has occurred. Awaiting the DFU_CLRSTATUS request.
Status
Value
Description
bmRequestType
bRequest
wValue
wIndex
wLength
Data
0010 0001b
DFU_CLRSTATUS (4)
Zero
Interface (4)
0
None


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