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    • 4. 发明申请
    • REFERENCE VOLTAGE AND IMPEDANCE CALIBRATION IN A MULTI-MODE INTERFACE
    • 多模式界面中的参考电压和阻抗校准
    • WO2009014796A1
    • 2009-01-29
    • PCT/US2008/064247
    • 2008-05-20
    • RAMBUS INC.NGUYEN, Huy M.GADDE, VijaySTOTT, Bret G.
    • NGUYEN, Huy M.GADDE, VijaySTOTT, Bret G.
    • G11C11/4074
    • G11C5/063
    • A memory controller includes a transmit circuit coupled to an output node and a receive circuit coupled to an input node. The transmit circuit transmits first data to a memory device through the output node and the receive circuit is configured to receive second data from the memory device through the input node. The memory controller includes a calibration circuit and control logic coupled to the calibration circuit, where the calibration circuit and the control logic are configured to select a first reference voltage and a driver impedance for the transmit circuit and are configured to select a second reference voltage and a termination impedance for the receive circuit. The first reference voltage, the second reference voltage, the driver impedance and the termination impedance are selected from a set of pre-determined values, which are associated with different signaling modes for communication of the first data and the second data.
    • 存储器控制器包括耦合到输出节点的发射电路和耦合到输入节点的接收电路。 发送电路通过输出节点将第一数据发送到存储装置,并且接收电路被配置为通过输入节点从存储装置接收第二数据。 存储器控制器包括校准电路和耦合到校准电路的控制逻辑,其中校准电路和控制逻辑被配置为为发射电路选择第一参考电压和驱动器阻抗,并且被配置为选择第二参考电压和 接收电路的终端阻抗。 从与用于通信第一数据和第二数据的不同信令模式相关联的一组预定值中选择第一参考电压,第二参考电压,驱动器阻抗和终端阻抗。