Reduced wake up delay for on-die routers

• Main Authors: Park Dongkook, Dai Donglai, Kumar Akhilesh
• Format: Patent
• Language: English
• Published: 06.02.2018
• Subjects: BASIC ELECTRONIC CIRCUITRY; CALCULATING; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION ANDCOMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION ANDCOMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWNENERGY USE; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS,e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USERAPPLICATIONS; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MULTIPLEX COMMUNICATION; PHYSICS; PULSE TECHNIQUE; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

Techniques for power gating. A first on-die router has an output port to receive data from a switching fabric. The output port is placed in a power-gated state if there is no activity in the output port for a current cycle and no messages are to be received by the output port during a subsequent cycle. A second on-die router has an input port coupled with the output port of the first on-die router. The input port is placed in a power-gated state if an input port buffer is empty and the output port is not active. Power-gating of the input port and the output port are independent of each other.