CAN Bus Controller with Message Filter (Mailbox concept)

Overview

CANmodule-III is a full functional CAN controller module that supports the concept of mailboxes. It is compliant to the international CAN standard defined in ISO 11898-1.

It contains 16 receive buffers, each one with its own message filter, and 8 transmit buffers with prioritized arbitration scheme. For optimal support of Higher Level Protocols (HLP) such as DeviceNet or SDC, the message filter covers the first two data bytes as well.

The design is written in technology independent HDL and can be mapped to ASIC and FPGA architectures and makes use of on-chip SRAM structures. An AMBA Advanced Peripheral Bus (APB) interface enables smooth integration into ARM based SOC’s. This full synchronous bus interface can easily be connect to other system buses.

Key Features

Standard Compliant

Full CAN 2.0B compliant
Conforms to ISO 11898-1
Maximum baudrate of 1 Mbps with 8 MHz system clock

Receive Path

16 receive buffers
Each buffer has its own message filter
Message filter covers: ID, IDE, RTR, Data byte 1 and Data byte 2
Message buffers can be linked together to build a bigger message array
Automatic remote transmission request (RTR) response handler

Transmit Path

8 Tx message holding registers with programmable priority arbitration
Message abort command

System Bus Interface

AMBA 2.0 Advanced Peripheral Bus Interface
Full synchronous zero wait-states interface
8, 16, or 32-bit wide data path
Status and configuration interface

Programmable Interrupt Controller

Local interrupt controller covering message and CAN error sources

Test and Debugging Support

Listen only mode

SRAM Based Message Buffers

Optimized for low gate-count implementation
Single port, synchronous memory based
100% Synchronous Design

Block Diagram

Deliverables

VHDL or Verilog RTL Source Code
Verification Suite

Functional Testbench including CANbus tranceiver model and additional CAN nodes

Synthesys Script
Data Sheet
User Guide
Hotline Support by means of phone, fax and e-mail

Technical Specifications

Foundry, Node

Technology independent

Maturity

Silicon proven in ASIC and FPGA Technologies

Availability

now

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