Invention Grant
US08238175B2 Semiconductor memory device, memory module including the same, and data processing system
失效
半导体存储器件，包括其的存储器模块和数据处理系统
- Patent Title: Semiconductor memory device, memory module including the same, and data processing system
- Patent Title (中): 半导体存储器件，包括其的存储器模块和数据处理系统
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Application No.: US12706415Application Date: 2010-02-16
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Publication No.: US08238175B2Publication Date: 2012-08-07
- Inventor: Hiroki Fujisawa
- Applicant: Hiroki Fujisawa
- Applicant Address: JP Tokyo
- Assignee: Elpida Memory, Inc.
- Current Assignee: Elpida Memory, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2009-034571 20090217
- Main IPC: G11C7/00
- IPC: G11C7/00
Abstract:
To provide a semiconductor device including a skew detecting circuit activated in a write leveling mode, and an ODT control circuit that activates a terminating resistance circuit connected to a data strobe terminal by using an ODT signal. The ODT control circuit includes counters that delay the ODT signal, activates the terminating resistance circuit by using the ODT signal having passed the counters in a normal operation mode, and activates the terminating resistance circuit by using the ODT signal having bypassed the counters in the write leveling mode. With this configuration, in the write leveling mode, a write leveling operation can be performed quickly without waiting for latency of the ODT signal.
Public/Granted literature
- US20100208535A1 SEMICONDUCTOR MEMORY DEVICE, MEMORY MODULE INCLUDING THE SAME, AND DATA PROCESSING SYSTEM Public/Granted day:2010-08-19
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