Dual purpose serializer/de-serializer and method thereof

Abstract

The present invention relates to a dual purpose serializer / de-serializer (SerDes) for point-to-point and point-to-multipoint communication. A configurable SerDes can be designed to operate in one of a plurality of operating modes. Selection between the plurality of operating modes can be based on information received via a management interface. In one example, the various operating modes can be defined with different locking times and jitter characteristics.

Description

technical field [0001] The present invention relates to serial / deserializers (SerDes), and more particularly, to a dual-function SerDes for point-to-point and point-to-multipoint communications. Background technique [0002] The serial / deserializer is essentially an integrated circuit (IC or chip) transceiver, which can realize mutual conversion between parallel data and serial data. Wherein, the sending unit outputs a serial data stream after inputting parallel data lines. The transmit unit may also contain a phase-locked loop (PLL) that multiplies the incoming parallel clock to match the serial frequency. For example, a SerDes in a Gigabit Ethernet system has 10 parallel data lines clocked at 125MHz and an output serial data stream clocked at 1.25GHz. Gigabit Ethernet serial / deserializers generally use 8B / 10B encoding schemes to map 8-bit symbols to 10-bit symbols to achieve DC balance on the line. The receiving unit is the reverse process of the sending unit, that is, ...

AI Technical Summary

Problems solved by technology

As the time requirements for achieving lock become stricter, the design of the serializer / deserializer in the OLT will face stricter constraints

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