Device and method for forwarding digitised analog messages and digital data messages from a user interface to a processing section of a radiotelephone

摘要

A radiotelephone data transfer apparatus (211, 219) connects peripheral devices external to the radiotelephone (201) and other user information inputting devices, such as a handset (203) for a cellular mobile radiotelephone, to the radiotelephone's central processor and speech processor (207). The data bus apparatus generates frame formats in which the information is sent over the data bus. The frame formats are further subdivided into time slots, the time intervals in which individual messages are sent. The data transfer apparatus (211, 219) is configured so that messages sent to the cellular radiotelephone's speech processor are not flow controlled, while messages sent to the radiotelephone's central processor are flow controlled. Further, the radiotelephone's central processor controls operation of peripheral devices attached to the radiotelephone. <IMAGE>