Patent · US Expired

System for interfacing with an external accessory in one of two interface modes based on whether communication can be established with external accessory or not

US6012105A · kind A · utility

165Cited by

7References

24Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Jan Rubbmark · Malmö, SE
Jan Lind · Norrköping, SE
Lars Engelin · Mörbylånga, SE

Key dates

Filing date	May 1, 1997
Grant date	Jan 4, 2000
Priority date	—
Expiry date	May 1, 2017

Classification

Technology area (CPC H)Electricity
CPC primaryH04M1/72409
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

An electronic device operates with an external accessory by initiating a serial data communication over an accessory control bus. If data communication is established with the external accessory, the electronic device operates in a first interface mode, when one or more operating parameters are transferred over the bus. If data communication is not established, the electronic device operates in a second interface mode, when no operating parameters are transferred over the bus.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.