Vehicular communications system having improved serial communication
First Claim
Patent Images
1. An apparatus for use in an automotive rear vision system, comprising:
- an interface unit comprising a reference clock, the interface unit configured to transmit control information using a first serial data stream multiplexed with the reference clock signal over a common transmission line;
a remote unit operated with a camera for providing video information where the remote unit is configured to extract the multiplexed reference clock from the first serial data stream utilizing at least one first variable delay element operating as a phase shifting component in a delay locked loop, the remote unit utilizes the extracted multiplexed reference clock as a timing reference for receiving the first serial data stream to provide the control information to the remote camera such that there is a fixed delay until the application of a reset signal; and
wherein the total time of a calibration of the at least one first variable delay element is calculated using the bit period of an input signal received over the common transmission line, a period count and the number of possible propagation delay values that are selectable by a control input to the at least one first variable delay element.
1 Assignment
0 Petitions
Accused Products
Abstract
A communications system for controlling equipment associated with a vehicle, includes a micro-controller (604) and a digital serial communication link (621, 622, 662, 663) using a multiplexed timing signal and first data signal. A camera or image sensor (650) located in the vehicular component communicates with the micro-controller (604) via the digital serial communication link.
-
Citations
24 Claims
-
1. An apparatus for use in an automotive rear vision system, comprising:
-
an interface unit comprising a reference clock, the interface unit configured to transmit control information using a first serial data stream multiplexed with the reference clock signal over a common transmission line; a remote unit operated with a camera for providing video information where the remote unit is configured to extract the multiplexed reference clock from the first serial data stream utilizing at least one first variable delay element operating as a phase shifting component in a delay locked loop, the remote unit utilizes the extracted multiplexed reference clock as a timing reference for receiving the first serial data stream to provide the control information to the remote camera such that there is a fixed delay until the application of a reset signal; and wherein the total time of a calibration of the at least one first variable delay element is calculated using the bit period of an input signal received over the common transmission line, a period count and the number of possible propagation delay values that are selectable by a control input to the at least one first variable delay element. - View Dependent Claims (2, 3, 4, 5)
-
-
6. An apparatus for use in an automotive rear vision system, comprising:
-
a remote unit operating with a camera configured to receive a first serial data stream and multiplexed reference clock, the remote unit including at least one variable delay element operating as a phase shifting component in a delay locked loop for extracting the multiplexed reference clock from the first serial data stream, wherein the at least one variable delay element is periodically calibrated such that there is a fixed delay until a reset signal is applied such that a total time of a delay calibration of the variable delay element is calculated using a bit period of an input signal over the common transmission line, a period count and the number of possible propagation delay values selectable by a control input to the at least one variable delay element; and wherein the at least one variable delay element is used to generate a local reference clock comprising a frequency that is a fixed multiple of the extracted multiplexed reference clock. - View Dependent Claims (7, 8)
-
-
9. An automotive communications apparatus for use in the operation of vehicular electronic systems, comprising:
-
an interface unit comprising a reference clock, the interface unit configured to transmit control information using a first serial data stream multiplexed with the reference clock signal over a common transmission line; a remote unit configured to receive a first serial data stream and multiplexed reference clock, the remote unit comprising at least one variable delay element operating as a phase shifting component in a delay locked loop for extracting the multiplexed reference clock from the first serial data stream wherein the at least one variable delay element is periodically calibrated such that there is a fixed delay until the application of a reset signal; and wherein the total time of a delay calibration of the at least one first variable delay element is equal to a bit period of an input signal over the common transmission line multiplied by a period count multiplied by the number of possible propagation delay values that are selectable by a control input to the at least one first variable delay element. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
Specification