System for the exchange of data assìncronos via an interface of comuncicação sìncrona between a communication device and an external accessory.

摘要

Invention patent: "a system for the exchange of data assu00ecncronos through a communication interface su00ecncrona between a communication device and an external accessory.A portable communications device (200) and the system accessory that provides asynchronous communications fully duplex between a portable communication device (200) and external accessories (214) by means of a synchronous digital interface (215).The system includes a digital signal processor (208) to generate a first synchronous digital voice signal, a UART (232) to generate a first asynchronous data signal.And a microprocessor (210) to generate a control signal for synchronous control.The system also includes a first multiplexer (236) for multiplexing the first synchronous digital voice signal and the first data signal and the control signal asynchronous to synchronous controlA line interface (215). The line interface separates the communication device to the at least one external accessory (214).A second multiplexer (242) is coupled to the interface line (215) to direct the first synchronous digital voice signal and the command signal of synchronous control for at least one dispositivThe internal synchronous (217), and to direct the first data signal to the asynchronous asynchronous internal device (230).