Lsi Logic Corporation

Ics Electronics Corporation

Shih-Hsing Huang

Narayanan Raman

Gerald K Mercola

A method synchronizes serial data stream output from a multiple-port system. The multiple-port system includes a plurality of port devices. The method includes (a) timing a serial data stream at each port device, the serial data stream including a series of data frames, (b) generating a framing signal at each port device, the framing signal indicating a boundary of the data frame in the serial data stream, (c) supplying the framing signal to a next port device, and (d) synchronizing, at each next port, the timing of the serial data stream in response to the supplied framing signal.

Method and system for synchronizing serial data streams in multiple-port design

A multiple port system includes a plurality of port devices, each port device including a control register set, and a control bus coupled to the plurality of port devices. The control bus provides a control signal to each port device, and the control signal includes port address information and register address information. The control register set includes a set of registers responsive to the control signal if the port address information indicates the corresponding port device, and a designated register responsive to the control signal if the port address information indicates one of the plurality of the port devices and the register address information indicates the designated register.

Multiple port system and method for controlling the same

A bus extender and data transmission method in which a continuous train of message frames of fixed size is sent along a dual serial link in both directions simultaneously. There is no handshaking between extenders unless a transmission error is detected. Message frames are constructed at a rate which is independent of serial link length and the bus data transfer rate. Each extender is divided into a bus handshake layer which sends and receives data and signals from a local bus, a management layer which continuously constructs message frames, responds to commands and receives and decodes incoming messages from a remote extender, and a transport layer. The transport layer has shift registers and encoders to receive messages from the management layer and transmit them over the serial link and has a memory to store up to 30 messages in the event of a retransmission request. The transport layer also receives messages from the serial link, checks for valid error-free messages and sends them to the management layer. It also initiates a retransmission request in the event a transmission error is detected.

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San Jose, CA, United States of America

Shih-Hsing Huang