Low power, high bandwidth, low latency data bus
First Claim
1. A system comprising:
- 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;
wherein each transmission line of the multi-drop bus is terminated using the first slave device attached at one end of the transmission line and by the device controller attached at the other end of the transmission line and wherein the multi-drop bus is configured to support one or more intermediate signaling nodes such that reflections due to mismatches in impedance by inclusion of the intermediate signaling nodes are controlled to allow multi-drop device support and high speed signaling;
wherein the intermediate signaling nodes are connected to the transmission lines with short interruption to a travelling wave, and wherein stubs and/or disruptions of the transmission lines are shorter than the shortest wavelength used for signaling; and
wherein the second communications protocol supports multiple audio data rates using a fixed frame format.
4 Assignments
0 Petitions
Accused Products
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.
-
Citations
20 Claims
-
1. A system comprising:
-
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; wherein each transmission line of the multi-drop bus is terminated using the first slave device attached at one end of the transmission line and by the device controller attached at the other end of the transmission line and wherein the multi-drop bus is configured to support one or more intermediate signaling nodes such that reflections due to mismatches in impedance by inclusion of the intermediate signaling nodes are controlled to allow multi-drop device support and high speed signaling; wherein the intermediate signaling nodes are connected to the transmission lines with short interruption to a travelling wave, and wherein stubs and/or disruptions of the transmission lines are shorter than the shortest wavelength used for signaling; and wherein the second communications protocol supports multiple audio data rates using a fixed frame format. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A method comprising:
-
receiving and transmitting, using a device controller, digital audio data across a first interface in accordance with a first communications protocol; controlling, using the device controller, a multi-drop bus comprising a plurality of transmission lines in accordance with a second communications protocol; receiving and transmitting, by a first slave device coupled to the multi-drop bus, the digital audio data with the device controller in accordance with the second communications protocol, the transmission lines terminating at the device controller and first slave device; and controlling multi-drop bus communications with at least one intermediate signaling node connected to the multi-drop bus through stubs that are shorter than the shortest wavelength used for signaling, and wherein reflections due to mismatches in impedance by inclusion of the at least one intermediate signaling node in the second communications protocol are controlled to allow multi-drop device support and high speed signaling; wherein the second communications protocol supports multiple audio data rates using a fixed frame format. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification