PM0237 datasheet(27/88 Pages) STMICROELECTRONICS

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PM0237

Bluetooth low energy technology

On GAP context, two fundamental concepts are defined:

•

GAP modes: it configures a device to act in a specific way for a long time. There are

four GAP modes types : broadcast, discoverable, connectable and bondable type.

•

GAP procedures: it configures a device to perform a single action for a specific, limited

time. There are four GAP procedures types: observer, discovery, connection, bonding

procedures.

Different types of discoverable and connectable modes can be uses at the same time. The

following GAP modes are defined:

Table 20. GAP broadcaster mode

Mode

Description

Notes

GAP role

Broadcast mode

Device only broadcasts

data using the link layer

advertising channels and

packets (it does not set any

bit on Flags AD type).

Broadcasts data can be

detected by a device using

the observation procedure

Broadcaster

Table 21. GAP discoverable modes

Mode

Description

Notes

GAP role

Non-discoverable

mode

It cannot set the limited and

general discoverable bits on

Flags AD type.

It cannot be discovered by a

device performing a general

or limited discovery

procedure

Peripheral

Limited

discoverable mode

It sets the limited

discoverable bit on Flags AD

type.

It is allowed for about 30 sec.

It is used by devices with

which user has recently

interacted. For example,

when a user presses a button

on the device.

Peripheral

General

discoverable mode

It sets the general

discoverable bit on Flags AD

type.

It is used when a device

wants to be discoverable.

There is no limit on the

discoverability time.

Peripheral

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