Device and method for enabling multi-core environment provided on bus

Abstract

A device and method for enabling a multi-core environment provided on a bus is provided, wherein the bus is subjected to the Impedance control by an active terminal. The device comprises a protocol analyzer and a plurality of drivers. The protocol analyzer is disposed within a processor core and configured to receive one or more protocol signals, and is configured to indicate whether or not the processor core owns the bus. The plurality of drivers is coupled to the protocol analyzer. Each of the plurality of drivers has one of a corresponding plurality of nodes, and each is configured to control how the one of the corresponding plurality of nodes is driven responsive whether or not the processor core owns the bus. Each of the plurality of drivers has protocol-based multi-core logic. The protocol-based multi-core logic is configured to enable pull-up logic if the processor core owns the bus, and is configured to disable the pull-up logic if the processor core does not own the bus. The invention can provide good bus active impedance control and reserve the required transmission line characteristic.

Description

technical field [0001] The present invention relates to microelectronics, and in particular to a mechanism for enabling and maintaining multiple processor contexts on a bus that require active control of bus termination impedance, wherein the multiple processor contexts include A processor package substrate (Processor Package Substrate) has a plurality of processor dies on it. Background technique [0002] Currently, in order to support fast incident wave switching (Incident Wave Switching) with low output amplitude (Low Output Swing), the bus architecture provides a point-to-point bus interface (Point- To-Point Bus Interface). In addition to providing a point-to-point bus interface, the bus architecture also requires the microprocessor (or other devices) to provide an internal termination impedance control circuit to dynamically adjust the termination impedance on the point-to-point bus, where the impedance value can generally be selected to match the characteristics of th...

AI Technical Summary

Problems solved by technology

Therefore, driving the I / O signal to the actual pull-up termination impedance will cause high frequency noise (High Frequency Noise), reflection (Reflection), ringing (Ringing), timing offset (Timing Displacement) and other defects

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