Philips PDIUSBD12 - 7 Chapter 7 Chapter 9 Protocol; Clear Feature Request

Interconnectivity Page 15 of 22
Firmware Programming Guide for PDIUSBD12
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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.
Is recipient a device?
Is recipient an
Interface?
Is recipient an
endpoint?
Clear device feature
according to
"Feature Selector"
Yes
No
Yes
No
Yes
Unsupported
Command
No
Clear endpoint feature
according to
"Feature Selector"
Sent zero length
packet to Host
Clear Feature
End Clear
Feature