Invention Grant
- Patent Title: Apparatus and method for locally optimizing source synchronous data strobes
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Application No.: US15389528Application Date: 2016-12-23
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Publication No.: US09953002B2Publication Date: 2018-04-24
- Inventor: Vanessa Canac , James R. Lundberg
- Applicant: VIA TECHNOLOGIES, INC.
- Applicant Address: TW New Taipei
- Assignee: VIA TECHNOLOGIES, INC.
- Current Assignee: VIA TECHNOLOGIES, INC.
- Current Assignee Address: TW New Taipei
- Agency: McClure, Qualey & Rodack, LLP
- Main IPC: G06F1/12
- IPC: G06F1/12 ; G06F13/42 ; G11C8/18 ; G11C7/10

Abstract:
An apparatus is provided that compensates for misalignment on a synchronous data bus. The apparatus includes a replica radial distribution element, a bit lag control element, and a synchronous lag receiver. The replica radial distribution element is configured to receive a lag pulse signal, and is configured to generate a replicated strobe signal, where the replica radial distribution network comprises replicated propagation path lengths, loads, and buffering of a radial distribution network for a strobe. The bit lag control element is configured to measure the time between assertion of the lag pulse signal and assertion of the replicated strobe signal when an update signal is asserted, and is configured to generate a first value on a lag bus that indicates the time. The bit lag control element has delay lock control that is configured to select one of a plurality of successively delayed versions of the lag pulse signal that coincides with the assertion the replicated strobe signal, and is configured to generate a second value on a lag select bus that indicates the propagation time, where the delay lock control selects the one of a plurality of successively delayed versions of the lag pulse signal by incrementing and decrementing bus states of select inputs on a mux, and where the plurality of successively delayed versions comprises inputs to the mux. The synchronous lag receiver is coupled to the bit lag control element, and is configured to receive a first one of a plurality of radially distributed strobes and a data bit, and is configured to delay registering of the data bit by the time.
Public/Granted literature
- US20170103035A1 APPARATUS AND METHOD FOR LOCALLY OPTIMIZING SOURCE SYNCHRONOUS DATA STROBES Public/Granted day:2017-04-13
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