NEC mPD78F0730, Preliminary User'S Manual

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CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
Preliminary User’s Manual U19014EJ1V0UD
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Table 12-9. FW-Supported Standard Requests
Request Reception
Side
Processing/
Frequency
Explanation
CLEAR_FEATURE Interface Automatic
STALL response
It is considered that this request does not come to Interface
because there is no function selector value, though it is reserved
for bmRequestType.
When this request is received, the hardware makes an automatic
STALL response.
SET_FEATURE Interface Automatic
STALL response
It is considered that this request does not come to Interface
because there is no function selector value, though it is reserved
for bmRequestType.
When this request is received, the hardware makes an automatic
STALL response.
GET_DESCRIPTOR String FW Returns the string descriptor.
When this request is received by the SETUP token, the hardware
generates the CPUDEC interrupt request for FW. FW decodes
the contents of the request from the CPUDEC interrupt request,
and writes the data to be returned to the host, to the UF0E0W
register.
SET_DESCRIPTOR Device FW Rewrites the device descriptor.
When this request is received by the SETUP token, the hardware
generates the CPUDEC interrupt request for FW. FW decodes
the contents of the request from the CPUDEC interrupt request,
and the writes the data for the next control transfer (OUT) to the
UF0DDn register (n = 0 to 17).
SET_DESCRIPTOR Configuration FW Rewrites the configuration descriptor.
When this request is received by the SETUP token, the hardware
generates the CPUDEC interrupt request for FW. FW decodes
the contents of the request from the CPUDEC interrupt request,
and the writes the data for the next control transfer (OUT) to the
UF0CIEn register (n = 0 to 255).
SET_DESCRIPTOR String FW Rewrites the string descriptor.
When this request is received by the SETUP token, the hardware
generates the CPUDEC interrupt request for FW. FW decodes
the contents of the request from the CPUDEC interrupt request,
and loads the data for the next control transfer (OUT).
Other NA FW When this request is received by the SETUP token, the hardware
generates the CPUDEC interrupt request for FW. FW decodes
the contents of the request from the CPUDEC interrupt request,
and performs the necessary processing.
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