IP builds configurable CAN bus controller with flexible data-rate

September 27, 2016 // By Graham Prophet
Targeting autonomous cars and ADAS systems, polish IP provider and SoC designer Digital Core Design (DCD) has introduced the DCAN FD IP Core, a configurable CAN Bus controller with Flexible Data-Rate. It conforms to Bosch CAN 2.0B specification (2.0B Active) and CAN FD (flexible data-rate) in accordance to ISO 11898-1:2015.

The improved protocol overcomes standard CAN limits: data can be transmitted faster than with 1 Mbps (up to 8Mbps) and the payload (data field) is up to 64 Byte long. When only one node is transmitting, the bit-rate can be increased, because no nodes need to be synchronized. Standard CAN requirements, DCD observes, become insufficient in modern automotive. The carmakers demand more bandwidth and more throughputs for most CAN-based in-vehicle networks. The DCAN FD IP Core is also a good alternative for non-automotive projects where not the increasing speed is the target. The longer payload (more than 8 Byte) becomes crucial then.

The core has a simple CPU interface (8/16/32 bit configurable data width), with small or big endian addressing scheme. Hardware message filtering and 128 byte receive FIFO enable back-to-back message reception, with minimum CPU load. The DCAN FD is described at RTL level, allowing target use in FPGA or ASIC technologies.

DCD: http://dcd.pl/ipcore/131/dcan-fd/


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