16

4256B–USB–03/06

AT89C5132

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.

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

Table 15. 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.

Table 14. bStatus Values (Continued)

Status

Value

Description

bmRequestType

bRequest

wValue

wIndex

wLength

Data

0010 0001b

DFU_CLRSTATUS (4)

Zero

Interface (4)

0

None