- The single master asks the slaves for information and the slaves
respond after each request.
- Data Acquisition Systems
- Remote Sensing
- The single master issues a command to a slave and the slave can
- Garage Doors/Car locks
- Lighting Systems
- Slave must wait till Master polls for information
- Slave just out of range canít communicate with master.
- Good for single point to point pair for remote control or acquisition.
to Peer with Multi-Master Networking using CSMA:†
- Carrier Sense Multiple Access allows multiple nodes to access
- Nodes Listen, then wait a random amount of time, then listen and if bus clear send.
- Nodes donít know if someone else damaged their message until destination
- Protocol overhead can require a lot of extra software.
- IEEE 802.11 PC Networking
- Nodes can use spread spectrum to better utilize band or share
Networking (not a CAN to CAN wireless bridge):
- Multiple nodes use CAN bitwise arbitration to determine who
stays transmitting and who starts receiving the message.
- CANRF modules use On Off Keying Modulation to represent dominant(0) and recessive(1) bits.
- Small Code footprint for node because the network communications
is done by CAN MCP2510 device.
- Slave Nodes can forward messages from other slaves to expand
the range of the network.
- Inexpensive at $99US Qty. 1.
- CANRF RF portion can interface directly to embedded CAN processors.
- Software for PIC microprocessors.
Some of the products or
prototypes that use the CANRF.
Board for Spectrum Digital Evaluation Board
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This page last updated July 30,2003
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