FUSB_CONTROL0
reg = fusbtc_read_reg(sc, FUSB_CONTROL0);
fusbtc_write_reg(sc, FUSB_CONTROL0, reg);
reg = fusbtc_read_reg(sc, FUSB_CONTROL0);
fusbtc_write_reg(sc, FUSB_CONTROL0, reg);
reg = fusbtc_read_reg(sc, FUSB_CONTROL0);
fusbtc_write_reg(sc, FUSB_CONTROL0, reg);