IP2022 Data Sheet www.ubicom.com 75 5.9.11    LFSR Configuration The   LFSR   units   were   designed   with   the   following
communication  protocols  in  mind:  Bluetooth,  Ethernet,
Homeplug, HomePNA, HomeRF, IEEE 802.11, and USB. Table   5-17   shows   the   LFSR   configurations   used   to
support these protocols. Table 5-17  LFSR Configurations for Various Protocols Protocol Subfunction D0 In Feedback D Out USB CRC16 Din^D15 Din^D15 CRC5 Din^D4 Din^D4 Ethernet CRC32 Din^D31 Din^D31 Scrambler Din^D17^D22 Din^D17^D22 Descrambler Din Din^D17^D22 HomePlug CRC8 Din^D7 Din^D7 CRC16 Din^D15 Din^D15 Scrambler D6^D3 Din^D6^D3 HomePNA CRC8 Din^D7 Din^D7 CRC16 Din^D15 Din^D15 Scrambler D17^D22 Din^D17^D22 802.11 CRC32 (FCS) Din^D31 Din^D31 CRC16 (HEC) Din^D15 Din^D15 Data
Whitening D3^D6 Din^D3^D6 CRC16 (CRC) Din^D15 Din^D15 Scrambler Din^D3^D6 Din^D3^D6 Descrambler Din Din^D3^D6 Home-RF CRC Din^D31 Din^D31 Scrambler Din Din^D3^D8 Descrambler Din Din^D3^D8 Bluetooth FEC Din^D4 Din^D4 HEC Din^D7 Din^D7 CRC16 Din^D15 Din^D15 Data
Whitening D6 D6 Din^D6 Encryption Din^D8^D12^D20^D25 D24 Din^D12^D16^D24^D31 D24 Din^D4^D24^D28^D33 D32 Din^D4^D28^D36^D39 D32