TC1796
System Units (Vol. 1 of 2)
Introduction
User’s Manual 1-22 V2.0, 2007-07
Intro, V2.0
The message objects are organized in double-chained linked lists, where each CAN
node has its own list of message objects. A CAN node stores frames only into message
objects that are allocated to the message object list of the CAN node, and it transmits
only messages belonging to this message object list. A powerful, command-driven list
controller performs all message object list operations.
The bit timings for the CAN nodes are derived from the module timer clock (f
CAN
), and
are programmable up to a data rate of 1 Mbit/s. External bus transceivers are connected
to a CAN node via a pair of receive and transmit pins.
CAN Features
• Compliant with ISO 11898
• CAN functionality according to CAN specification V2.0 B active
• Dedicated control registers for each CAN node
• Data transfer rates up to 1 Mbit/s
• Flexible and powerful message transfer control and error handling capabilities
• Advanced CAN bus bit timing analysis and baud rate detection for each CAN node
via a frame counter
• Full-CAN functionality: A set of 128 message objects can be individually
– Allocated (assigned) to any CAN node
– Configured as transmit or receive object
– Set up to handle frames with 11-bit or 29-bit identifier
– Identified by a timestamp via a frame counter
– Configured to remote monitoring mode
• Advanced acceptance filtering
– Each message object provides an individual acceptance mask to filter incoming
frames.
– A message object can be configured to accept standard or extended frames or to
accept both standard and extended frames.
– Message objects can be grouped into four priority classes for transmission and
reception.
– The selection of the message to be transmitted first can be based on frame
identifier, IDE bit and RTR bit according to CAN arbitration rules, or on its order in
the list.
• Advanced message object functionality
– Message objects can be combined to build FIFO message buffers of arbitrary size,
limited only by the total number of message objects.
– Message objects can be linked to form a gateway that automatically transfers
frames between 2 different CAN buses. A single gateway can link any two CAN
nodes. An arbitrary number of gateways can be defined.
• Advanced data management
– The message objects are organized in double-chained lists.
To Next Page
Loading...
Need help?
General