Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 21 USB FUNCTION CONTROLLER (USBF)
R01UH0042EJ0500 Rev.5.00 Page 1052 of 1513
Aug 12, 2011
Notes 3. The SET_FEATURE request sets the UF0 device status register L (UF0DSTL) and UF0 EPn status register L
(UF0EnSL) (n = 0 to 4, 7) when ACK is received in the status stage. If the E0HALT bit of the UF0E0SL
register is set, a STALL response is made in the status stage or data stage of control transfer for a request
other than the GET_STATUS Endpoint0 request, SET_FEATURE Endpoint0 request, and a request
generated by the CPUDEC interrupt request, until the CLEAR_FEATURE Endpoint0 request is received. A
STALL response to an unsupported request does not set the E0HALT bit of the UF0E0SL register to 1, and
the STALL response is cleared as soon as the next SETUP token has been received.
4. If the wValue is not the default value, an automatic STALL response is made.
Cautions 1. The sequence of control transfer defined by the Universal Serial Bus Specification is not satisfied
under the following conditions. The operation is not guaranteed under these conditions.
• If an IN/OUT token is suddenly received without a SETUP stage
• If DATA PID1 is sent in the data phase of the SETUP stage
• If a token of 128 addresses or more is received
• If the request data transmitted in the SETUP stage is of less than 8 bytes
2. An ACK response is made even when the host transmits data other than a Null packet in the
status stage.
3. If the wLength value is 00H during control transfer (read) of FW processing, a Null packet is
automatically transmitted for control transfer (without data). The FW request does not
automatically transmit a Null packet.
Remarks 1. Df: Default state, Ad: Addressed state, Cf: Configured state
2. n = 0 to 4
It is determined by the setting of the UF0 active interface number register (UF0AIFN) whether a request
with Interface number 1 to 4 is correctly responded to, depending on whether the Interface number of the
target is valid or not.
3. $$: Valid endpoint number including transfer direction
The valid endpoint is determined by the currently set Alternate Setting number (see 21.6.3 (36) UF0
active alternative setting register (UF0AAS), (38) UF0 endpoint 1 interface mapping register
(UF0E1IM) to (42) UF0 endpoint 7 interface mapping register (UF0E7IM)).
4. ? and #: Value transmitted from host (information on Interface numbers 0 to 4)
It is determined by the UF0 active interface number register (UF0AIFN) and UF0 active alternative setting
register (UF0AAS) whether an Alternate Setting request corresponding to each Interface number is
correctly responded to or not, depending on whether the Interface number and Alternate Setting of the
target are valid or not.