3results about How to "Avoid metastability" patented technology

This application discloses an encoding converter and encoding conversion method, relating to the field of digital circuit technology. The encoding converter includes: a trigger signal control circuit and an encoding state generation circuit; the trigger signal control circuit is connected to the encoding state generation circuit; the trigger signal control circuit is used to acquire a first number of encoding states and a first maximum number of encoding states, and sends the judgment result of the numerical relationship between the first number of encoding states and the first maximum number of encoding states to the encoding state generation circuit. By implementing the encoding converter and encoding conversion method described in this application, when the number of states in the state machine is less than the maximum number of Gray codes, a first encoding transition state is generated, causing the Gray code state to transition from the final state to the first state through the transition state, and the operation corresponding to the transition state is set to a no-operation. This avoids metastability caused by the simultaneous flipping of multiple bits in the Gray code, ensuring the security of data operations.

The application discloses a kind of sampling data processing method and device, the method includes: the scanning data in dynamic delay range is calibrated;Wherein, the scanning data is the data obtained by adjusting dynamic delay parameter value for first set training code or second set training code continuously sent by opposite end;When calibration is completed in this end, it will be changed to send second set training code to opposite end for sending first set training code to opposite end, and continuously receive the training code returned by the opposite end;When it is determined that the training code is second set training code, it is determined that the opposite end calibration is completed, then handshake succeeds.Utilize the method, by scanning boundary point and combining the handshake mode of training code, calibration is carried out in the process of handshake, accurate sampling center point can be obtained, avoid the case that metastable state or error code exists when sampling, improve the efficiency of sampling in calibration process, ensure the stability of communication.

This application provides a method and apparatus for converting low-voltage differential signals into serial local bus signals, relating to the field of signal processing technology. The method includes: receiving a low-voltage differential clock signal and a low-voltage differential data signal; converting the low-voltage differential clock signal and the low-voltage differential data signal into an internal single-ended clock signal and an internal single-ended data signal, respectively; performing synchronization processing on the internal single-ended clock signal and the internal single-ended data signal to obtain a synchronized clock signal and a synchronized data signal; performing edge detection on the synchronized clock signal to generate a sampling control pulse; and converting the synchronized data signal into a serial local bus data signal according to the sampling control pulse, and outputting a serial local bus synchronized clock signal with the same frequency as the low-voltage differential clock signal. This application can save pin resources and reduce hardware costs.