isp116x_write_reg16(isp116x, HCuPINTENB, 0);
irqstat = isp116x_read_reg16(isp116x, HCuPINT);
isp116x_write_reg16(isp116x, HCuPINT, irqstat);
isp116x_write_reg16(isp116x, HCuPINTENB, 0);
irqstat = isp116x_read_reg16(isp116x, HCuPINT);
isp116x_write_reg16(isp116x, HCuPINT, irqstat);