Local interconnect network bus architecture

Patent metadata

Field	Value
Publication number	US-10749706-B2
Application number	US-201715622117-A
Country	US
Kind code	B2
Filing date	Jun 14, 2017
Priority date	Jun 14, 2016
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

The present invention relates to an integrated circuit device for controlling LIN slave nodes based on a control signal transmitted by a LIN master control device. The IC device comprises a slave node circuit for processing the control signal when received in the form of a LIN message frame via a first data line terminal. The IC device also comprises a master node circuit for processing further control signals to be transmitted in the form of LIN message frames via a second data line terminal to the LIN slave nodes. The IC device also comprises a processing unit for controlling the LIN slave nodes based on the control signal by composing the further control signals.

First claim

The invention claimed is:

1. An integrated circuit device for controlling a plurality of Local Interconnect Network (LIN) slave nodes based on a control signal transmitted by a LIN master control device, comprising:
a slave node circuit comprising a first data line terminal for connecting to a first LIN data line and a first LIN protocol controller operably connected to said first data line terminal, said slave node circuit being adapted for processing said control signal when received in the form of a LIN message frame via said first data line terminal,
a master node circuit comprising a second data line terminal for connecting to a second LIN data line and a second LIN protocol controller operably connected to said second data line terminal, said master node circuit being adapted for processing further control signals to be transmitted in the form of LIN message frames via said second data line terminal to said plurality of LIN slave nodes,
a processing unit for controlling said plurality of LIN slave nodes based on said control signal, wherein said controlling of said plurality of LIN slave nodes comprises composing said further control signals for controlling an electrical load and/or a sensor function connected to, or integrated in, each of the plurality of LIN slave nodes in accordance with said further control signals, and
at least one load terminal for connecting to a local electrical load to be controlled, said processing unit being furthermore adapted for controlling a voltage and/or current to be supplied via said at least one load terminal in response to said control signal.

2. The integrated circuit device in accordance with claim 1 , wherein said at least one load terminal is adapted for driving at least one light emitting diode.

3. The integrated circuit device in accordance with claim 1 , in which said processing unit is adapted for controlling at least one light emitting diode driven by each of said plurality of LIN slave nodes.

4. The integrated circuit device according to claim 1 , wherein said slave node circuit further comprises a first physical layer LIN transceiver for interfacing between said first data line terminal and said first LIN protocol controller, and
wherein said master node circuit further comprises a second physical layer LIN transceiver for interfacing between said second data line terminal and said second LIN protocol controller.

5. The integrated circuit device according to claim 1 , wherein said processing unit is adapted for analysing status information received from said plurality of LIN slave nodes via said master node circuit, and relaying said status information to said LIN master control device via said slave node circuit.

6. The integrated circuit device according to claim 1 , furthermore comprising a slave auto-addressing means for determining a unique identifier of the slave node circuit for use in communication traffic exchanged via said first data line terminal.

7. The integrated circuit device according to claim 1 , wherein said master node circuit is adapted for allowing said plurality of LIN slave nodes to be detected and/or assigned a corresponding network identifier automatically.

8. A Local Interconnect Network (LIN) bus system comprising a LIN bus and a plurality of nodes;
said plurality of nodes comprising a LIN master control device, at least one integrated circuit device according to claim 1 , and a plurality of LIN slave nodes;
said plurality of nodes being connected to said LIN bus such as to enable LIN message frames to be exchanged between said plurality of nodes;
said LIN master control device being connected by a first LIN data line to said at least one integrated circuit device;
the or each at least one integrated circuit device being connected by a corresponding second LIN data line to at least some of said plurality of LIN slave nodes.

9. The LIN bus system in accordance with claim 8 , wherein said plurality of nodes comprises more than 16 nodes.

10. The integrated circuit device according to claim 1 , wherein the second LIN protocol controller comprises a universal asynchronous receiver-transmitter (UART) block configured to provide full duplex asynchronous non-return-to-zero serial communication via the second data line terminal.

11. The integrated circuit device according to claim 1 , wherein the second LIN protocol controller comprises a serial peripheral interface (SPI) block configured for providing a full duplex operation.

12. A method for controlling a plurality of Local Interconnect Network (LIN) slave nodes, the method comprising:
transmitting, using a LIN master control device, a control signal in the form of a LIN message frame via a first LIN data line to an integrated circuit device having a slave node circuit, a master node circuit and a processing unit,
processing, using said slave node circuit, said control signal and composing, using said processing unit, at least a further control signal in response to said control signal, wherein said further control signals are for controlling an electrical load and/or a sensor function connected to or integrated in, each of the plurality of LIN slave nodes in accordance with said further control signals
transmitting, using said master node circuit, said at least one further control signal in the form of at least a further LIN message frame to said plurality of LIN slave nodes via a second LIN data line, and
controlling an electrical load connected to said integrated circuit device via one load terminal in accordance with said control signal.

13. The method in accordance with claim 12 , furthermore comprising a step of receiving, by said plurality of LIN slave nodes, said further control signal and controlling, by each of said plurality of LIN slave nodes, a corresponding electrical load connected to each LIN slave node in accordance with said further control signal.

14. The method of claim 13 , wherein each of said electrical load connected to each LIN slave node and said electrical load connected to said integrated circuit device have a similar or identical function.

Assignees

• Melexis Technologies Nv

Inventors

• Bender Michael
• Mckenna Philip
• Freitag Thomas

Classifications

• H04L2012/40273

  the transportation system being a vehicle · CPC title

• H05B47/18

  via data-bus transmission · CPC title

• H04L2012/40234

  Local Interconnect Network LIN · CPC title

• H04L12/40006 Primary

  Architecture of a communication node (current supply arrangements H04L12/10; intermediate storage or scheduling H04L49/90) · CPC title

• H04L12/403

  with centralised control, e.g. polling · CPC title