Detection of a stuck data line of a serial data bus
US-2024419623-A1 · Dec 19, 2024 · US
Device presence detection using a single channel of a bus
US8990465B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8990465-B2 |
| Application number | US-201213709015-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 9, 2012 |
| Priority date | Dec 9, 2012 |
| Publication date | Mar 24, 2015 |
| Grant date | Mar 24, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
The presence of devices attached to a bus are detected by a controller of a bus transmitting a signal on a channel of the bus, to cause each device to hold the channel to a first logical state for a duration of time that is unique to each device. The device that holds the channel to the first logical state for the longest duration of time is detected. Detected devices remain idle while undetected devices repeat holding the channel to the first logical state for the duration of time, until detected. All devices are detected when the channel returns to a second logical state.
First claim
Opening claim text (preview).
What is claimed is: 1. A method to detect a presence of devices on a bus, the bus including a channel having at least two logical states, the method comprising: transmitting a signal on the channel, to cause each of one or more devices connected to the channel to release the channel after holding the channel to a first logical state for a duration of time that is unique to each of the one or more devices; and detecting a device of the one or more devices that releases the channe…
Assignees
Inventors
Classifications
Physics · mapped topic
- G06F13/4291Primary
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US8990465B2 cover?
- The presence of devices attached to a bus are detected by a controller of a bus transmitting a signal on a channel of the bus, to cause each device to hold the channel to a first logical state for a duration of time that is unique to each device. The device that holds the channel to the first logical state for the longest duration of time is detected. Detected devices remain idle while undetect…
- Who is the assignee on this patent?
- IBM, Lenovo Entpr Solutions Singapore Pte Ltd
- What technology area does this patent fall under?
- Primary CPC classification G06F13/4291. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 24 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).