* 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
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
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
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
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
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 |
Insight
Compared to its predecessor PCA82C200, the SJA1000 offers greater buffer capacity, flexible dual modes, and robust error management, making it highly suitable for modern automotive and industrial CAN networks. Its long-standing industry adoption also ensures strong ecosystem support and proven reliability.
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