Invention Grant
US07974141B2 Setting memory device VREF in a memory controller and memory device interface in a communication bus
有权
将存储器设备VREF设置在通信总线中的存储器控制器和存储器件接口中
- Patent Title: Setting memory device VREF in a memory controller and memory device interface in a communication bus
- Patent Title (中): 将存储器设备VREF设置在通信总线中的存储器控制器和存储器件接口中
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Application No.: US12361592Application Date: 2009-01-29
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Publication No.: US07974141B2Publication Date: 2011-07-05
- Inventor: Benjamin A Fox , William P Hovis , Thomas W Liang , Paul Rudrud
- Applicant: Benjamin A Fox , William P Hovis , Thomas W Liang , Paul Rudrud
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Toler Law Group
- Main IPC: G11C5/14
- IPC: G11C5/14 ; G11C7/00 ; G11C8/16 ; H03K17/16 ; H03K19/094
Abstract:
A memory device is connected through an interface to a memory controller. The memory device's reference voltage is set based on a driver's impedance of the memory device and the controller driver drive strength during driver training. The voltage is applied to a reference resistor pair at the memory device and changed until the voltage level switches. The voltage is then set at the reference resistor pair of the memory device.
Public/Granted literature
- US20100188908A1 Setting Memory Device VREF in a Memory Controller and Memory Device Interface in a Communication Bus Public/Granted day:2010-07-29
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