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Memory controller, control method thereof and memory system

A memory controller and control circuit technology, applied in the field of memory, can solve problems such as misjudgment of logical values, and achieve the effect of accurate logical values

Pending Publication Date: 2022-01-21
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the reference voltage is not suitable for some receivers, the misjudgment of logic values ​​will become more serious

Method used

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  • Memory controller, control method thereof and memory system
  • Memory controller, control method thereof and memory system
  • Memory controller, control method thereof and memory system

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Embodiment Construction

[0023] In the following detailed description of the embodiments of the invention, reference is made to the accompanying drawings which form a part hereof, and in which are shown by way of illustrations certain preferred embodiments in which the invention may be practiced . These embodiments have been described in sufficient detail to enable those skilled in the art to practice them, and it is to be understood that other embodiments may be utilized and mechanical, structural and other modifications may be made without departing from the spirit and scope of the invention. and program changes. this invention. Therefore, the following detailed description should not be taken as limiting, and the scope of embodiments of the present invention is defined only by the appended claims.

[0024] It will be understood that although the terms "first", "second", "third", "primary", "secondary", etc. may be used herein to describe various elements, components, regions, layers and / or sectio...

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Abstract

The invention discloses a memory controller which includes a plurality of channels, wherein a first channel of the plurality of channels includes: a first transmitter configured to generate a first data signal to a memory module; a first pull-up variable resistor coupled between the power supply voltage and the output end of the first transmitter; a first pull-down variable resistor coupled to the output end of the first transmitter; and a control circuit, coupled to the plurality of channels, for controlling the first pull-up variable resistor and / or the first pull-down variable resistor according to a reference voltage used by the memory module. According to the invention, each transmitter adjusts the voltage level of the transmitted data signal through the first pull-up variable resistor and / or the first pull-down variable resistor, so that the intermediate voltage level of each data signal is close to the reference voltage as much as possible, and a logic value is obtained more accurately.

Description

technical field [0001] The technical field of memory of the present invention, in particular, relates to a memory controller, a control method thereof, and a memory system. Background technique [0002] In a dynamic random access memory (DRAM) system, there are multiple channels (channels) between the DRAM controller and the DRAM module for transmitting data signals (ie, DQ (data signal) signals). Each channel can be used for bi-directional data transmission, that is, the DRAM controller has a transmitter and receiver for each channel, and the DRAM module also has a transmitter and receiver for each channel. When the DRAM controller sends the DQ signal to the DRAM module through multiple channels, the receiver of the DRAM module can use the reference voltage to determine the logic value (ie bit) of the DQ signal. For example, if the receiver determines that the voltage level of the DQ signal is higher than the reference voltage, the receiver may determine that the DQ signal...

Claims

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Application Information

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IPC IPC(8): G11C7/22
CPCG11C7/22G06F13/4077G11C5/063G11C11/4093G11C7/1084G11C29/028G11C29/021G11C11/4074G11C11/4094G11C11/406
Inventor 吴忠桦余名薪
Owner MEDIATEK INC