Synaptics Incorporated
Low power, high bandwidth, low latency data bus

Abstract:

Data bus systems and methods include a device controller coupled to a first interface for digital audio data communications in accordance with a first communications protocol, the device controller including a master bus controller for controlling a multi-drop bus in accordance with a second communications protocol; and a first slave device coupled to the multi-drop bus and configured to transmit and receive digital audio data communications with the device controller in accordance with the second communications protocol. Each transmission line end is terminated using the device attached at one end of the transmission line and by another device attached at the other end and reflections due to mismatches in impedance by inclusion of intermediate signaling nodes are controlled to allow multi-drop device support and high speed signaling. The second communications protocol supports multiple audio data rates using a fixed frame format.