Motorola Solutions, Inc.

Heng Leong Leong

Daniel Grobe Sachs

Robert A Zurek

Joo Yih See

Sheau Wei Ch'ng

Sheau Wei Ch'Ng

Xiang Rhung Ng

An audio accessory with high and low impedance paths to a speaker is provided, and a radio therefor. The audio accessory comprises: a speaker; an audio interface to connect to a respective audio interface of the radio; a switching circuit comprising: high and low impedance paths; and a switch to connect the audio interface to the speaker via one of the high and low impedance paths, the switch initially connecting the audio interface to the speaker via the high impedance path. The accessory further comprises a data interface to connect to a respective data interface of the radio; and a controller to: in response to receiving, via the first data interface, from the radio, a message to control the switch to connect the audio interface to the speaker via the low impedance path, control the switch to connect the audio interface to the speaker via the low impedance path.

Audio accessory with high and low impedance paths to a speaker, and a radio for the audio accessory

An accessory interface () for an electronic accessory is provided. The accessory interface includes a microprocessor () that provides selectable data functionality. A configuration memory () is coupled to a connector () of the accessory interface via a unidirectional configuration interface (). The unidirectional configuration interface indicates the selectable data functionality to a portable radio. The portable radio presents data connectivity signals to first and second GPIO pins of the connector which represent either valid or invalid data configuration states. The configuration state is presented to a single ended one (SE) input port of the microprocessor. The microprocessor selects a data connectivity mode of operation in response to valid and invalid configurations being presented to the SEport. An accessory incorporating the accessory interface is able to interchangeably connect to different radios supporting different data connectivity modes of operation.

Accessory interface for a portable communication device

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Bukit Mertajam, Malaysia

Heng Leong Leong