Abstract: An apparatus and method therefor relate generally to a CRC engine. In such a CRC engine, a feed forward circuit is coupled to a feedback circuit. The feed forward circuit includes: an offset circuit configured to determine an offset value from header data; a look-up table circuit configured to select a seed value responsive to the offset value; a shifter circuit configured to successively load a zero padding and a payload in multiple byte blocks as aligned data with the zero padding leading the payload for a non-zero value of the offset value in a first of the multiple byte blocks having the zero padding and a first portion of the payload; and a CRC circuit configured to receive data zeroes to a seed port thereof and the aligned data to a data port thereof to provide an interim CRC value.

Abstract: A master modem is configured to generate a carrier signal for transmission over a wired connection. A slave modem is configured to change an impedance of the wired connection to alter generation of the carrier signal by the master modem. The impedance of the wired connection is changed based on data to be provided by the slave modem. The master modem can demodulate its own carrier signal to obtain the data provided by the slave modem. The impedance of the wired connection could be changed by changing an impedance of a transformer winding or inductor of the slave modem, where the transformer winding or inductor is coupled to the wired connection. The impedance of the wired connection could also be changed by changing a reactance of a circuit coupled to the wired connection.

Abstract: A master modem is configured to generate a carrier signal for transmission over a wired connection. A slave modem is configured to change an impedance of the wired connection to alter generation of the carrier signal by the master modem. The impedance of the wired connection is changed based on data to be provided by the slave modem. The master modem can demodulate its own carrier signal to obtain the data provided by the slave modem. The impedance of the wired connection could be changed by changing an impedance of a transformer winding or inductor of the slave modem, where the transformer winding or inductor is coupled to the wired connection. The impedance of the wired connection could also be changed by changing a reactance of a circuit coupled to the wired connection.