Bi-directional buffer with circuit protection time synchronization

A method comprising:

• performing time synchronization using a circuit that provides protection against circuit damage from misconfigured port use of signal transmission during receive mode and signal receipt during transmit mode and
• commensurate with providing the protection, the circuit controlling latency of a transmit signal, wherein the circuit comprises:
• an input/output port;
• a first circuitry to generate a timing signal by calibration of the timing signal and a received signal and based on a primary-secondary clock scheme, wherein the received signal comprises a 1 PPS signal, a 10 MHz signal, or other frequency clock signal;
• a receive circuitry path to transfer the received signal to the first circuitry, wherein the receive circuitry path comprises an isolation circuit coupled to the input/output port and second circuitry to receive different voltage level ranges of the received signal;
• a transmit circuitry path to transfer the timing signal for transmission from the input/output port, wherein
• the transmit circuitry path comprises a protected controlled latency circuit coupled to an isolation circuitry,
• the transmit circuitry path is to protect against signals received through the transmit circuitry path and provide a controlled signal propagation latency and the isolation circuit is to isolate the transmit circuitry path from voltage received at an output from the transmit circuitry path during transmission mode, and
• a current regulating circuitry is to reduce a level of received current at a buffer based on a voltage applied at the input/output port during the transmission mode.

A system comprising:

• at least one memory;
• at least one processor coupled to the at least one memory;
• and
• a network interface comprising a timing synchronization system, wherein the timing synchronization system comprises:
• an input/output port;
• a transmit circuitry path that is to protect against signals received through the transmit circuitry path and a control signal propagation latency;
• and
• a receive circuitry path, wherein:
• the timing synchronization system comprises a circuitry to generate a timing signal by calibration of the timing signal and a received signal from the input/output port and based on a primary-secondary clock scheme, wherein the received signal comprises a 1 PPS signal, a 10 MHz signal, or other frequency clock signal,
• the receive circuitry path to transfer the received signal to the circuitry, wherein the receive circuitry path comprises an isolation circuit coupled to an input/output port and second circuitry to receive different voltage level ranges of the received signal;
• the transmit circuitry path to transfer the timing signal for transmission, wherein the transmit circuitry path comprises a protected controlled latency circuit coupled to an isolation circuitry, wherein the transmit circuitry path is to protect against signals received through the transmit circuitry path and provide a controlled signal propagation latency and the isolation circuitry is to isolate the transmit circuitry path from voltage received at an output from the transmit circuitry path during transmission mode.