发明申请
- 专利标题: SIGNAL LINES WITH INTERNAL AND EXTERNAL TERMINATION
- 专利标题(中): 具有内部和外部终止的信号线
-
申请号: US12555886申请日: 2009-09-09
-
公开(公告)号: US20100073023A1公开(公告)日: 2010-03-25
- 发明人: Kyung Suk Oh , Woopoung Kim , Huy M. Nguyen , Eugene C. Ho
- 申请人: Kyung Suk Oh , Woopoung Kim , Huy M. Nguyen , Eugene C. Ho
- 申请人地址: US CA Los Altos
- 专利权人: RAMBUS INC.
- 当前专利权人: RAMBUS INC.
- 当前专利权人地址: US CA Los Altos
- 主分类号: H03K17/16
- IPC分类号: H03K17/16
摘要:
Embodiments of a memory controller are described. This memory controller communicates signals to a memory device via a signal line, which can be a data signal line or a command/address signal line. Termination of the signal line is divided between an external impedance outside of the memory controller and an internal impedance within the memory controller. The memory controller does not activate the external impedance prior to communicating the signals and, therefore, does not deactivate the external impedance after communicating the signals. The internal impedance of the memory controller can be enabled or disabled in order to reduce interface power consumption. Moreover, the internal impedance may be implemented using a passive component, an active component or both. For example, the internal impedance may include either or both an on-die termination and at least one driver.
公开/授权文献
- US07915912B2 Signal lines with internal and external termination 公开/授权日:2011-03-29