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Interconnectivity
Firmware Programming Guide for PDIUSBD12
7. Chapter 9 Protocol
7.1 Clear Feature Request
In the Clear feature request, MCU will need to clear or disable a specific feature of the device. In our case,
MCU will determine whether the request is meant for the device, interface, or endpoints. Note that there will not
be any support if the recipient is an interface. Feature selectors are used when enabling or setting features
specific to the device or endpoint such as remote wakeup. When the recipient is a device, MCU will need to
disable the remote wakeup function if this function has been enabled. If the recipient is the endpoint, the MCU
will have to unstall the specific endpoint through the Set Endpoint Status command.
Unsupported
Command
Clear Feature
Is recipient a device?
No
Is recipient an
Yes
Interface?
No
Is recipient an
No
endpoint?
Yes
Clear endpoint feature
according to
"Feature Selector"
Sent zero length
packet to Host
End Clear
Feature
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Yes
Clear device feature
according to
"Feature Selector"
Page 15 of 22
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