Methods and systems for reducing supply and termination noise

摘要

Described is a communication system in a first integrated circuit (IC) communicates with a second IC via single-ended communication channels. A bidirectional reference channel extends between the first and second ICs and is terminated on both ends. The termination impedances at each end of the reference channel support different modes for communicating signals in different directions. The termination impedances for the reference channel can be optimized for each signaling direction.

主权项

1. An integrated circuit supporting a transmit mode and a receive mode, the integrated circuit comprising:
at least one reference termination element connected to a reference pad to exhibit a transmit-reference signal on the reference pad in the transmit mode and a receive-reference signal different from the transmit-reference signal on the reference pad in the receive mode; and data transceivers, each data transceiver coupled to the reference pad and to a respective information pad, each transceiver to transmit a transmit-data signal in the transmit mode and to compare a respective receive-data signal with the receive-reference signal in the receive mode.