Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 21 USB FUNCTION CONTROLLER (USBF)
R01UH0042EJ0500 Rev.5.00 Page 1185 of 1513
Aug 12, 2011
Table 21-9. 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.