beCAN

　　The beCAN controller (basic enhanced CAN), interfaces the CAN network and supports the

　　CAN protocol version 2.0A and B. It has been designed to manage a high number of

　　incoming messages efficiently with a minimum CPU load.

　　For safety-critical applications the beCAN controller provides all hardware functions to

　　support the CAN time triggered communication option (TTCAN).

　　The maximum transmission speed is 1 Mbit.

　　Transmission

　　<

　　Three transmit mailboxes

　　<

　　Configurable transmit priority by identifier or order request

　　<

　　Time stamp on SOF transmission

　　Reception

　　<

　　8-, 11- and 29-bit ID

　　<

　　One receive FIFO (3 messages deep)

　　<

　　Software-efficient mailbox mapping at a unique address space

　　<

　　FMI (filter match index) stored with message

　　<

　　Configurable FIFO overrun

　　<

　　Time stamp on SOF reception

　　<

　　Six filter banks, 2 x 32 bytes (scalable to 4 x 16-bit) each, enabling various masking

　　configurations, such as 12 filters for 29-bit ID or 48 filters for 11-bit ID

　　<

　　Filtering modes:

　　–

　　Mask mode permitting ID range filtering

　　–

　　ID list mode

　　<

　　Time triggered communication option

　　–

　　Disable automatic retransmission mode

　　–

　　16-bit free running timer

　　–

　　Configurable timer resolution

　　–

　　Time stamp sent in last two data bytes