This application note describes a possible communication between controller devices with CAN modules (such as Siemens C515C, C167CR, SAE81C90), e.g. in multi processor
systems, where the devices are on the same card or in the same rack. No CAN transceiver devices are used for this application.
The proposed alternative structure permits communication between controller devices with CAN modules (such as Siemens C515C, C167CR, SAE81C90), e.g. in multi processor systems, where the devices are on the same card or in the same rack. If the standard serial channels are used for other purposes, the CAN module can easily be used for data exchange. Furthermore, the proposed solution reduces the number of required components and may have advantages compared to dualported RAM. Contrary to the standard CAN bus structure with the two CAN bus lines CAN_H and CAN_L (see figure 1), no CAN transceiver devices are used.