Freescale Semiconductor 94001480400/D manual Chapter System Operational Modes

Freescale Semiconductor, Inc.

ARCHIVED BY FREESCALE SEMICONDUCTOR, INC. 2005

Freescale Semiconductor, Inc.

ARCHIVED BY FREESCALE SEMICONDUCTOR, INC. 2005

Chapter 3

System Operational Modes

This section describes typical operations that the user must carry out to operate the Development Kit headset. It is divided into a number of use situations, each focusing on an aspect of system use.

Refer to Chapter 2, “User Interface” for an overview of the system MMI, including button action matrix and illustrations of audible and visual system indications.

On the silk print of the Development PCB, the buttons VOL+, VOL-, BT are designated +, -, and FUNC1 respectively.

3.1 Headset Power On/Connection Scan

When turned on, the headset automatically enters discoverable and connectable mode, that is, it will repeatedly scan for an incoming inquiry1 or connection request from other Bluetooth devices such as an audio gateway (AG).

If the AG desires, it may repeatedly try to connect to the headset, thus connecting right away when the headset is turned on, or it may repeatedly inquire for Bluetooth units in the vicinity, thus immediately discovering the headset when it is turned on. Having a connection to the headset up at all times will speed up the audio link connection process substantially, but will also reduce the battery lifetime of the headset since the units must exchange data from time to time to maintain synchronicity. A headset LED will indicate if a permanent (data) connection exists to the AG.

If the AG creates a permanent connection, it may employ one of the Bluetooth low-power modes supported by the headset, that is, Hold or Sniff Mode (see the Bluetooth specification for definitions).

The battery voltage level is monitored repeatedly whenever the headset is on. When there are approximately twenty minutes of battery time left, a large-interval recurring audio indication is started. From this point, the user will have a varying amount of time left, depending on the present use pattern. When the battery voltage has drained to the point where the headset is assessed to be able to run only slightly more than ten minutes, the interval between the recurring audio indications is shortened. Exactly five minutes after this moment, the headset will be automatically shut down in order to ensure that the battery is never completely depleted.

NOTE:

The proper thresholds depend on the selected battery, and will have to be adjusted by the user for optimal behavior. This feature is not yet available.

The user may power off the headset at any time. The current speech and indications volume settings will be stored before power-off.

1. The headset only scans for so-called General inquiries (not Limited inquiries), in order to optimise the response time.

MOTOROLASystem Operational Modes3-1

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