STA2416 datasheet(25/38 Pages) STMICROELECTRONICS

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STA2416

General specification

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6.10.2

Inquiry/page scan

When only inquiry scan or page scan is enabled, the STA2416 will go in Sleep Mode or

Deep Sleep Mode outside the receiver activity. The selection between Sleep Mode and

Deep Sleep Mode depend on the UART activity like in SNIFF or PARK.

6.10.3

No connection

If the Host places the UART in low power and there is no activity, then the STA2416 can be

placed in Deep Sleep Mode.

6.10.4

Active link

When there is an active link (SCO or ACL), the STA2416 cannot go in Deep Sleep Mode

whatever the UART state is. But the STA2416 baseband is made such that whenever it is

possible, depending on the scheduled activity (number of link, type of link, amount of data

exchanged), it goes in Sleep Mode.

6.11

SW initiated low power mode

A wide set of wake up mechanisms are supported.

6.12

Bluetooth™ - WLAN coexistence in collocated scenario

The coexistence interface uses four GPIO pins, when enabled.

Bluetooth™ and WLAN 802.11 b/g technologies occupy the same 2.4 GHz ISM band.

STA2416 implements a set of mechanisms to avoid interference in a collocated scenario.

The STA2416 supports five different algorithms in order to provide efficient and flexible

simultaneous functionality between the two technologies in collocated scenarios.

●

Algorithm 1: PTA (Packet Traffic Arbitration) based coexistence algorithm defined in

accordance with the IEEE 802.15.2 recommended practice.

●

Algorithm 2: the WLAN is the master and it indicates to the STA2416 when not to

operate in case of simultaneous use of the air interface.

●

Algorithm 3: the STA2416 is the master and it indicates to the WLAN chip when not to

operate in case of simultaneous use of the air interface.

●

Algorithm 4: Two-wire mechanism.

●

Algorithm 5: Alternating Wireless Medium Access (AWMA), defined in accordance

with the WLAN 802.11 b/g technologies.

The algorithm is selected via HCI command. The default algorithm is algorithm 1.

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