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CHAPTER 17 USB FUNCTION
17.4.3
Automatic Response of Macro Program to USB Standard
Request Commands
The USB function automatically responds to most USB standard request commands to
reduce the load on the application program.
However, the following USB standard request commands must be processed by the
application program:
Set_Descriptor, Get_Descriptor, and Synch_Frame commands
■ Automatic Response of Macro Program to USB Standard Request Commands
Table 17.4-1 lists the USB standard request commands that this macro program automatically
responds to and the details of the automatic responses.
The USB standard request commands conform to those supported by USB Function Ver1.1.
Table 17.4-1 USB Standard Request Commands and Details of Automatic Responses (1 / 2)
USB standard request command automatically
responded to by this macro program
CLEAR_FEATURE
GET_CONFIGURATION
GET_INTERFACE
442
Device:
DEVICE_REMOTE_WAKEUP
End point:
ENDPOINT_STALL
End point number supported
by this macro program
End point:
ENDPOINT_STALL
End point number not
supported by this macro
program
Interface number supported by
this macro program
Interface number not
supported by this macro
program
Details of automatic response
Data stage
-
-
-
Returns the current
value of Configuration
Returns the current
value of Alternate
Responds with STALL
signal
Status stage
Returns null data
Returns null data
Responds with
STALL signal
Receives null data
Receives null data
-
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