FEC_OC_SNC_HWM__A
rc = drxj_dap_write_reg16(dev_addr, FEC_OC_SNC_HWM__A, 5, 0);
rc = drxj_dap_write_reg16(dev_addr, FEC_OC_SNC_HWM__A, 12, 0);
status = write16(state, FEC_OC_SNC_HWM__A, 12);