14
AT89C5132
4256A–USB–06/03
Clear Status Any time the device detects an error and reports an error indication status to the host in
the response to a DFU_GETSTATUS request, it enters the dfuERROR state. The
device cannot transition from the dfuERROR state, after reporting any error status, until
after it has received a DFU_CLRSTATUS request. Upon receipt of DFU_CLRSTATUS,
the device sets a status of OK and transitions to the dfuIDLE state. Only then it is able to
transition to other states.
Device State This request solicits a report about the state of the device. The state reported is the cur-
rent state of the device with no change in state upon transmission of the response. The
values specified in the bState field are identical to those reported in DFU_GETSTATUS.
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
Table 10. bStatus Values (Continued)
Status Value Description
Table 11. bState Values
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.
bmRequestType bRequest wValue wIndex wLength Data
0010 0001b DFU_CLRSTATUS (4) Zero Interface (4) 0 None
bmRequestType bRequest wValue wIndex wLength Data
1010 0001b DFU_GETSTATE (5) Zero Interface (4) 1 State
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