Method of generating a clock signal in a module of a data transmission system, and correspondingly equipped data transmission system
AssigneeSiemens Aktiengesellschaft
InventorStefan Hermann
Life of this patent
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Abstract
The invention relates to a method for generating the working clock in a module of a data transmission system. The system is particularly suitable for use in a vehicle occupant protection system of a motor vehicle. A control unit of the data transmission system transmits a synchronization clock signal to the module. The module contains a frequency-locked and/or phase-locked loop which receives the synchronization clock signal and which generates the module working clock on the basis of the synchronization clock signal.
Claims12
A method of generating a working clock in a module of a data transmission system, which comprises:
- generating a synchronization clock signal in a control unit of the data transmission system in the form of voltage pulses;
- transmitting, with the control unit, the synchronization clock signal to the module of the data transmission system via a bidirectional interface;
- receiving the synchronization clock signal with a frequency-locked and/or phase-locked loop in the module;
- generating, with the frequency-locked and/or phase-locked loop a working clock on basis of the synchronization clock signal;
- controlling an operation of the module with the working clock;
- and
- transmitting data from the module to the control unit in the form of current pulses via the bidirectional interface.
A data transmission system, comprising:
- a control unit with a synchronization clock signal generator generating a synchronization clock signal;
- a module with a frequency-locked and/or phase-locked loop;
- a data transmission line connecting said module to said control unit, said data transmission line being a bidirectional interface acting as a voltage interface in a direction from said control unit to said module for transmitting the synchronization clock signal from said control unit to said module, and acting as a current interface in a direction from said module to said control unit for transmitting data from said module to said control unit;
- and
- said frequency-locked and/or phase-locked loop of said module receiving the synchronization clock signal generated by said synchronization clock generator of said control unit, and, based on the synchronization clock signal, generates a working clock controlling an operation of the module, including transmission and reception processes of said module.
Dependencies are inferred from the claim text.