The PCcan product family comprises three members PCcan 4xHS, PCcan HS/HS, and PCcan HS.
The board is a quarter-size (length 135 mm) 8-bit ISA bus board and occupies 64 bytes of I/O space. The base address can be any of 200H, 240H, 300H and 340H. The interrupt signal on the CAN controllers can be connected – under software control – to any one of IRQ 2/9, IRQ 3 and IRQ 5 on the ISA bus.
The original 16 MHz oscillator may be replaced with an oscillator of frequency range 1–24 MHz to obtain the required bit rate on the bus. The PCcan 4xHS board draws approximately 600 mA at 5V.
The industry-standard CAN controllers on the PCcan cards are directly accessible to the programmer. This makes the cards suitable for cross-platform development: you can develop your software on your PC and then move it, with a minimum of changes, to your embedded system.
The CAN controllers support CAN 2.0 A and 2.0 B (active.) The CAN bus drivers supports the standard, high-speed ISO11898 physical layer.
The outputs from the CAN circuits are connected to female D-SUB connectors via optocouplers and bus drivers (Philips 82C251, conforming to ISO 11898).
The connectors provide the voltage feed for the bus section (optocouplers and driver circuits). Alternatively the PC is used as power source; however this gives no galvanic separation between the computer and the CAN bus.
On the PCcan 4xHS card, it is possible to connect all the 4 CAN in/outputs to a common CAN bus, which is also connected to the CAN-connector.