UCC_BMR_GBL
function_code = UCC_BMR_BO_BE | UCC_BMR_GBL;
iowrite8(UCC_BMR_GBL | UCC_BMR_BO_BE, &uccup->common.rbmr);
iowrite8(UCC_BMR_GBL | UCC_BMR_BO_BE, &uccup->common.tbmr);