US 11,112,820 B1 · Method for transmitting signals between domains having different clocks, circuit, and electronic apparatus thereof

Abstract

A signal transmitting circuit providing compatibility and stability in signal transmissions across domains with different clock frequencies includes an edge detection circuit, a flip circuit, a synchronization circuit, and an edge extraction circuit. The edge detection circuit detects an edge of an initial interrupt signal and generates an event trigger signal in a faster clock domain. The flip circuit converts the event trigger signal into an edge signal. The synchronization circuit synchronizes the edge signal under a slower clock domain and generates a synchronization signal. The edge extraction circuit generates a trigger signal based on the synchronization signal in the slower clock domain to a target circuit in the slower clock domain. A method and an electronic apparatus related to the signal transmitting circuit are also disclosed.

Claims20

Dependent claims

A method for transmitting signals between different clock domains used in an electronic apparatus, the electronic apparatus comprises an edge detection circuit and a pulse synchronization circuit;

the method comprising:
receiving an initial interrupt signal in a faster clock domain by the edge detection circuit;
detecting an edge of the initial interrupt signal and generating an event trigger signal by the edge detection circuit;
converting the event trigger signal into an edge signal by the pulse synchronization circuit;
synchronizing the edge signal under a slower clock domain and generating a synchronization signal by the pulse synchronization circuit;
and
generating a trigger signal based on the synchronization signal in the slower clock domain by the pulse synchronization circuit to a target circuit in the slower clock domain.

4 more elements

A signal transmitting circuit comprising:

an edge detection circuit, configured to detect an edge of an initial interrupt signal and generate an event trigger signal in a faster clock domain;
a flip circuit, configured to convert the event trigger signal into an edge signal
a synchronization circuit, configured to synchronize the edge signal under a slower clock domain and generate a synchronization signal;
and
an edge extraction circuit, configured to generate a trigger signal based on the synchronization signal in the slower clock domain to a target circuit in the slower clock domain.

2 more elements

An electronic apparatus comprising:

a signal transmitting circuit, configured to receive an initial interrupt signal;
the signal transmitting circuit comprising:
an edge detection circuit, configured to detect an edge of an initial interrupt signal and generate an event trigger signal in a faster clock domain;
a flip circuit, configured to convert the event trigger signal into an edge signal
a synchronization circuit, configured to synchronize the edge signal under a slower clock domain and generate a synchronization signal;
and
an edge extraction circuit, configured to generate a trigger signal based on the synchronization signal in the slower clock domain to a target circuit in the slower clock domain.

4 more elements

Dependencies are inferred from the claim text.

Method for transmitting signals between domains having different clocks, circuit, and electronic apparatus thereof

Life of this patent

Method for transmitting signals between domains having different clocks, circuit, and electronic apparatus thereof

Life of this patent

Abstract

Claims20