* Question
What are the basic characteristics of Philips’ SJAl000?
* Answer
The Philips (now NXP) SJA1000 is a stand-alone CAN (Controller Area Network) controller widely used in automotive and industrial applications. It was designed as a successor to the PCA82C200 and remains popular for its robustness and compatibility. Its basic characteristics can be summarized as follows:
1. Compatibility and Modes
span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: #000000;">Pin & Electrical Compatibility: Fully compatible with the earlier PCA82C200, making it easy to replace in existing designs.Dual Operation Modes:
BasicCAN mode: Default startup mode, ensures backward compatibility with PCA82C200.
PeliCAN mode: Enhanced mode with advanced features such as error counters, bus-off management, listen-only mode, self-test mode, and better interrupt handling.
2. Buffer and Data Handling
span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: #000000;">Extended Receive Buffer: A 64-byte FIFO helps reduce message loss and improves throughput compared to the PCA82C200’s single-message buffer.Flexible Identifier Support: Capable of handling both 11-bit (standard) and 29-bit (extended) CAN identifiers.
3. Protocol and Speed
style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: #000000;">CAN Protocol Support: Compliant with ISO 11898 (CAN 2.0B), supporting both standard and extended frames.High-Speed Communication: Bit rates up to 1 Mbit/s, enabling real-time data exchange in demanding environments.
4. Electrical and Interface Features
style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: #000000;">Operating Voltage: 4.5V – 5.5V.Temperature Range: –40 °C to +125 °C (industrial grade).
Bus Interface: Flexible parallel bus interface, supporting both Intel and Motorola microcontroller protocols.
5. Applications
="font-family: Arial, Helvetica, sans-serif; font-size: 12pt; color: #000000;">The SJA1000 is widely deployed in:Automotive systems (engine control units, body electronics, diagnostics).
Industrial automation (PLC networking, motor control, CANopen systems).
Medical devices requiring reliable real-time communication.
General embedded systems needing robust CAN connectivity.
Summary Table
Characteristic
Description
Compatibility
Pin/electrical compatible with PCA82C200
Modes
BasicCAN (default), PeliCAN (enhanced features)
Receive Buffer
64-byte FIFO for efficient message handling
Identifier Support
11-bit and 29-bit identifiers
Protocol
CAN 2.0B (ISO 11898 compliant)
Bit Rate
Up to 1 Mbit/s
Voltage Range
4.5V – 5.5V
Temp Range
–40 °C to +125 °C
Interface
Parallel bus, Intel/Motorola compatible
