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CAN and CAN FD Partial Networking Transceivers for More Efficient and Variable Nodes

Microchip CAN Partial Networking (PN) transceivers offer various operating modes and dedicated fail-safe features that make them an ideal choice for engineers designing high-speed CAN bus networks where the nodes are always connected to the battery but are only active when required by the application. These operating modes make it possible for a particular node or complete cluster to remain in selective sleep mode without wasting energy, and therefore minimizing the overall current consumption, when the respective tasks are not required. Less overall active current for inactive nodes creates a much more efficient system and adds flexibility to your next design.

Microchip CAN PN transceivers offer very low power consumption in Standby and Sleep modes and support ISO 11898-2:2016 compliant CAN Partial Networking by means of a selective wake-up function. A CAN frame decoder evaluates the bus traffic and checks for a matching frame that has been configured into registers via the SPI. A dedicated implementation of the partial networking function has been embedded into Microchip’s CAN PN transceivers making it possible to ignore CAN FD frames during Sleep/Standby mode, while waiting for a dedicated valid wake-up frame. Additionally, Microchip’s CAN PN transceivers support also the new CAN FD standard with data rates in Normal mode up to 5 Mbit/s. This partial networking feature is the perfect fit for networks that support both CAN FD and Classical CAN communications, allowing Classical CAN controllers that do not need to communicate CAN FD messages or are not supporting CAN FD to remain in partial networking mode during CAN FD communication. This is done by ignoring received CAN FD frames without generating bus errors. A window watchdog is also implemented in Microchip CAN PN transceivers.  

Featured CAN FD Partial Networking Transceiver

The ATA6570 is a high-speed CAN FD transceiver with a window watchdog and a CAN FD-passive implementation of the partial networking function. This dedicated feature allows the use of the ATA6570 in classical CAN, CAN FD and mixed CAN networks and reduces the current consumption by only activating those nodes which are currently required.