§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
EP0829808A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Serial bus controller

Assignee: NEC Electronics Corp
•
Filing: 1997-09-12
•
Granted: —
•
Expires: 2017-09-12
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A serial bus controller comprises a competition result discriminator (11A) for outputting a lost competition signal (DB) upon detecting a lost competition, by comparing a clock SCK and data SDA on a serial communication bus (17) against a clock CKO and data DAO, respectively, to be output from the own station to find any difference between them, a bus release controller (31A) for performing end-of-communication procedures including releasing the serial communication bus (17) in response to the lost competition signal (DB), and a slave mode setting section (32A) for effecting slave mode setting procedures in response to the lost competition signal (DB) and based on the data SDA on the serial communication bus (17).

Inventors

  • 👤 Yoshihiro NEC IC Microcomp. Syst. Ltd. Horiguchi

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-07 23:02
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/16; G06F15/163; G06F15/173; G06F13/00; G06F13/38; G06F13/382; G06F13/385

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 133 words
A serial bus controller for controlling serial data communication transmitted through a serial communication bus (17) connected to a plurality of computer stations each constituting a candidate for a master device and a slave device, said serial bus controller comprising: a communication controller (13A) for outputting a first serial data to reveal the corresponding computer station as a candidate for the master device; and a competition result discriminator (11A) for comparing said first serial data with second serial data appearing on the serial communication bus (17) to output a lost competition signal (DB) upon detecting the difference between said first serial data and said second serial data; characterized by a hardware device including a bus release controller (31A) for releasing the serial communication bus (17) in response to said lost competition signal (DB).
Claim 2
Dependent Claim 58 words
A serial bus controller as defined in claim 1 wherein said hardware device further includes a slave mode setting section (32A) for setting a slave mode in response to said lost competition signal (DB), wherein said slave mode setting section (32A) sets the own station to a state of the slave device based on said second serial data.
Claim 3
Dependent Claim 35 words
A serial bus controller as defined in claim 1 wherein said competition result discriminator (11A) Sets a lost competition flag (21) upon detecting the difference between said first serial data and said second serial data.
Claim 4
Dependent Claim 39 words
A serial bus controller as defined in claim 1 further comprising an interrupt demand controller (14) for outputting an interrupt demand signal (INT) in a timing of an end-of-communication signal (INTE) after occurrence of said lost competition signal (DB).

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag