The DCAN500 receives and transmits CAN2.0 A/B protocol messages.
The arbitration over the power line is based on the CAN message Identifier’s LSB 11 bits. The data is error protected;
QPSK modulated using a low voltage narrow-band carrier, eliminating the EMC generated by the “square wave” of the normal CAN bits. The DCAN500 is implemented in a small CMOS digital process allowing integration with other CMOS IPs such as micro-controllers. The DCAN500 is coupled to the DC line via a capacitor, thus, there is no need for a high voltage process such as needed by ordinary CAN transceivers.
This innovative solution allows low-cost overall CAN implementation, combining power and data over the same cable, withstanding the hostile DC lines impulse noises eliminating twisted pair wires, saving weight, and simplifies installation.
The DCAN500 is divided into the following main building blocks;
Protocol handling block interprets the CAN host protocol.
CODEC block, ECC encodes/decodes the data.
Modem block, phase modulates and demodulates the CAN message to and from the DC-BUS power line.
CSMA/CA mechanism provide CAN Carrier sense and arbitration capabilities to the device
Sleep mechanism ensures low power operation during sleep mode. During Sleep mode, the device wakes up for short period to detect possible wake-up messages from other devices on the power line.
A fabless semiconductor company since 1994. We develop and sell our unique devices for DC power line communication targeting wire saving. Customers in more than 51 countries use the devices in a wide range of applications; Automotive, Aerospace, Lighting, Battery monitoring (BMS) and more. The devices meet existing protocols such as UART, LIN, CAN, SPI, DMX512, and I2C keeping it simple to operate. Yamar engineers lead the LIN over DC powerline (DC-LIN) ISO 17987-8 standardization workgroup.
The innovation team continues to develop new technologies and products.