I-8120W

The CAN (Controller Area Network) is a serial communication bus especially suited to interconnect smart devices to build smart systems or sub-system. It efficiently supports distributed real-time control with a very high level of security. In CAN networks, there is no addressing of subscribers or stations in the conventional sense, but instead prioritized messages are transmitted. As standalone CAN controller,I-8120W with WinPAC/LinPAC/iPAC series MCU (main control unit) represents an economic solution. It has one CAN communication port with 5-pin screw terminal connector, and is useful for a wide range of CAN applications. Besides,I-8120W uses the new Phillips SJA1000T and transceiver 82C250, which provide both CAN 2.0A and 2.0B specific, re-transmission function, bus arbitration and error detection.

Combining the benefits of WinPAC/LinPAC/iPAC series MCU without increasing the CPU loading heavily, it could be a powerful multi CAN port programmable device server by driving the program in the 186 CPU ofI-8120W. It can also communicate with other kinds of communication interface, such as RS-232/RS-485/Ethernet ports to be a programmable device server. Therefore, users can design the various applications between different communication protocols.

Default Firmware Architecture

User-defined Firmware Architecture

Firmware Library Structure

• Support WinPAC-8000 series MCU (driver for LinPAC and iPAC series MCU will be available soon)
• 8 KB DPRAM inside
• RTC(Real Time Clock) inside
• Allow user to program user-defined firmware in I-8120W
• Support default firmware update
• eVC++ demos and libraries are given
• C/C++ function libraries of firmware is given

• Follow ISO11898-2 specification
• Philip SJA1000T CAN controller
• Philip 82C250 CAN transceiver
• CAN controller frequency :16 MHz
• 2500 Vrms photo-isolation protection on CAN side
• Switch for 120 Ω terminator resistor of CAN bus
• Compatible with CAN specification 2.0 parts A and B
• Provide default baud rate: 10 kbps, 20 kbps, 50 kbps, 125 kbps, 250 kbps, 500 kbps, 800 kbps, and 1 Mbps
• Allow user-defined baud rate
• Cyclic transmission precision: ±0.5ms precision when cyclic time is below 10ms , ±1% error when cyclic time exceeds 10ms
• Provide 5 sets of cyclic transmission
• Timestamp of CAN message with ±1ms precision