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Apparatus, memory device and method for storing parameter codes for asymmetric on-die-termination

專(zhuān)利號(hào)
US11888476B2
公開(kāi)日期
2024-01-30
申請(qǐng)人
SAMSUNG ELECTRONICS CO., LTD.（KR Suwon-si）
發(fā)明人
Daehyun Kwon; Hyejung Kwon; Hyeran Kim; Chisung Oh
IPC分類(lèi)
H03K19/017; H03K19/00; H03K19/17736; H03K19/17772
技術(shù)領(lǐng)域
odt,pull,circuit,signal,device,may,dq,second,line,data
地域： Suwon-si

摘要

An apparatus, a memory device, and a method for storing parameter codes with respect to asymmetric on-die-termination (ODT) are provided. The apparatus is connected to an external device via a signal line, and includes: an on-die termination (ODT) circuit set in a first ODT state; a plurality of signal pins, each of which is connected to the signal line; and an ODT control circuit configured to: identify whether a second ODT state of the external device corresponds to the first ODT state, and based on the apparatus being an asymmetric ODT in which the first ODT state and the second ODT state are different, provide an asymmetric ODT parameter code to the external device, and disable the ODT circuit when a signal is not transmitted through the signal line.

說(shuō)明書(shū)

According to an aspect of an example embodiment, An apparatus for checking an on-die termination (ODT) state is provided. The apparatus includes: a first device including a first controller and a first ODT circuit connected to a first pin and set to a first ODT state; and a second device including a second controller and a second ODT circuit connected to a second pin and set to a second ODT state, wherein the second pin is connected to the first pin through a signal line. The first controller is configured to disable the first ODT circuit when the apparatus is an asymmetric ODT in which the first ODT state and the second ODT state are different and a signal is not transmitted through the signal line, and the second controller is configured to disable the second ODT circuit when the apparatus is the asymmetric ODT and the signal is not transmitted through the signal line.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages will be more apparent from the following description, taken in conjunction with the accompanying drawings in which:

FIG. 1 is a block diagram illustrating an apparatus including on-die-termination (ODT) circuits according to example embodiments;

FIGS. 2 and 3 are diagrams conceptually illustrating the ODT circuits of FIG. 1;

FIG. 4 is a diagram illustrating an operation of the apparatus of FIG. 1;

FIG. 5 is a circuit diagram illustrating the ODT circuits of FIG. 2;

權(quán)利要求

1
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