Ethernet MAC frame filter register (ETH_MACCFFR)
| PM | Promiscuous mode  |  
| HU | Hash unicast  |  
| HM | Hash multicast  |  
| DAIF | Destination address inverse filtering  |  
| PAM | Pass all multicast  |  
| BFD | Broadcast frames disable  |  
| PCF | Pass control frames  |  
| SAIF | Source address inverse filtering  |  
| SAF | Source address filter  |  
| HPF | Hash or perfect filter  |  
| RA | Receive all  |