Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 21 USB FUNCTION CONTROLLER (USBF)
R01UH0042EJ0500 Rev.5.00 Page 1056 of 1513
Aug 12, 2011
(g) SET_CONFIGURATION() request
If any of wValue, wIndex, or wLength is other than the values shown in Table 21-3, a STALL response is made
in the status stage.
• Default state: The CONF bit of the UF0 mode status register (UF0MODS) and the UF0 configuration
register (UF0CNF) are set to 1 if the specified configuration value is 1 when the
SET_CONFIGURATION() request has been received. If the specified configuration value
is 0, the CONF bit of the UF0MODS register and UF0CNF register are cleared to 0. In
other words, the device skips the Addressed state and moves to the Configured state in
which it responds to the Default address.
• Addressed state: The CONF bit of the UF0MODS register and UF0CNF register are set to 1 and the device
enters the Configured state if the specified configuration value is 1 when the
SET_CONFIGURATION() request has been received. If the specified configuration value
is 0, the device remains in the Addressed state.
• Configured state: The CONF bit of the UF0MODS register and UF0CNF register are set to 1 and the device
returns to the Addressed state if the specified configuration value is 0 when the
SET_CONFIGURATION() request has been received. If the specified configuration value
is 1, the device remains in the Configured state.
If the SET_CONFIGURATION() request has been correctly processed, the target bit of the UF0 SET request
register (UF0SET) is set to 1, and an interrupt is issued. All Halt Features are cleared after the
SET_CONFIGURATION() request has been completed even if the specified configuration value is the same as
the current configuration value. If the SET_CONFIGURATION() request has been correctly processed, the
data toggle of all endpoints is always initialized to DATA0 again (it is defined that the default status, Alternative
Setting 0, is set from when the SET_CONFIGURATION request is received to when the SET_INTERFACE
request is received).
(h) SET_FEATURE() request
A STALL response is made in the status stage if the SET_FEATURE() request is for a Feature that cannot be
set or does not exist, or if the target is an interface or an endpoint that does not exist. A STALL response is
also made if the wLength value is other than 0.
• Default state: The correct response is made when the SET_FEATURE() request has been received, only
if the request is for a device or Endpoint0; otherwise a STALL response is made in the
status stage.
• Addressed state: The correct response is made when the SET_FEATURE() request has been received, only
if the request is for a device or Endpoint0; otherwise a STALL response is made in the
status stage.
• Configured state: The correct response is made when the SET_FEATURE() request has been received, only
if the request is for a device or an endpoint that exists; otherwise a STALL response is
made in the status stage.
When the SET_FEATURE() request has been correctly processed, the target bit of the UF0 SET request
register (UF0SET) and the EnHALT bit of the UF0 EPn status register L (UF0EnSL) are set to 1, and an
interrupt is issued (n = 0 to 4, 7).