USIE_UC_STATUS
[USIE_UC_STATUS] = {
if (sc->sc_uc_xfer[ucom->sc_subunit][USIE_UC_STATUS] == NULL)
usbd_transfer_start(sc->sc_uc_xfer[ucom->sc_subunit][USIE_UC_STATUS]);
usbd_transfer_stop(sc->sc_uc_xfer[ucom->sc_subunit][USIE_UC_STATUS]);