SIG100 Evaluation Board

At the transmitter side, each data from the ECU is transferred to the SIG100 on the HDI pin. The SIG100 IC processes each data byte and modulates it on the selected carrier frequency on the TXO pin that drives the DC power line via the protection network and coupling capacitor.

At the receiver side, the received data signal from the DC powerline passes through a protection network into the SIG100 device. The SIG100 decodes the data and outputs it on the HDO pin of the Host interface connector.

The built-in switching power supply provides the 3.3V voltage required for the SIG100 operation. The power supply operates in a wide input voltage range between 10V and 36V. The EVB current consumption is in the range of 30mA, depending on the supply input voltage (powerline voltage).

The SIG100 internal registers, as described in the SIG100 datasheet, determine the EVB operation conditions, such as carrier frequency, bit rate, etc. When the HDC signal is low, the data is directed as a command, allowing WRITE-REG and READ-REG to/from the SIG100 internal registers (see SIG100 IC datasheet).