Locking source synchronous selection pass receiver device and method

Abstract

The present invention provides a device of locking source synchronization gating receiver, including delay locking loop and gating receiver. The delay locking loop receives reference clock and generates selection vector signal and coding selection vector signal, the selection vector is used for selecting one of delay editions of the reference clock signal which are generated through the reference clock signal pass through certain periods. The selection vector subtracted by a value is used by Gray encode for indicating the first time period. All gating receivers connect with the delay locking loop. Each gating receiver receives the coding selection vector signal and corresponding gating signal, and locks the corresponding gating signal during the first time period after transforming the corresponding gating signal. The Gray code multiplexer selects one delay edition of corresponding gating signal to determine the first time period through the coding selection vector signal.

Description

technical field [0001] The present invention relates to the field of microelectronics, and more particularly to an apparatus and method for locking a source synchronous strobe receiver to prevent a microprocessor system using a source synchronous data and address bus from being caused by bus noise. error indication. And the present invention also provides a device and method applied to a microprocessing system with source synchronous buses of different frequencies. Background technique [0002] Computer systems today use source synchronous system buses to provide data exchange between bus agents, such as data exchanges between microprocessors and memory hubs. The "source synchronous" bus protocol enables data to be transmitted at very high speeds. The source synchronous protocol operates on the basis of the following principles: The transport bus agent (bus agent) puts data on the bus for a fixed period of time and sends out a and the The "strobe" signal corresponding to t...

AI Technical Summary

Problems solved by technology

Furthermore, there is no prior art to indicate a precise time when data strobes and corresponding data are received asynchronously with respect to other signals on the bus, such as the bus clock signal, which makes the receipt of the strobe signal considered is unreliable

[0013] Thus, the inventors of the present invention noticed that the prior art techniques for locking the reception of the data strobe signal are insufficient and limited because these techniques do not take into account the timing variation due to the reasons mentioned above

Devices employing these prior art techniques must be configured to operate under worst-case conditions, which reduces their effectiveness, or they must be tuned during manufacturing and testing

Images