STA2416 datasheet(27/38 Pages) STMICROELECTRONICS

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STA2416

General specification

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6.12.3

Algorithm 3: Bluetooth™ master

This algorithm represents the symmetrical case of Section 6.12.2: Algorithm 2: WLAN

master. Also in this case the interface is reduced to 1 line.

Figure 8.

Algorithm 3: Bluetooth™ master

When the STA2416 has to operate it alerts HIGH the RF_NOT_ALLOWED signal and the

WLAN will not operate while this signals stays HIGH.

This mechanism permits to avoid packet collision in order to make an efficient use of the

bandwidth, it provides high quality for all Bluetooth™ links but cannot provide guaranteed

quality over the WLAN links.

6.12.4

Algorithm 4: Two-wire mechanism

Based on algorithm 2 and 3, the Host decides, on a case-by-case basis, whether WLAN or

Bluetooth™ is master.

6.12.5

Algorithm 5: Alternating wireless medium access (AWMA)

AWMA utilizes a portion of the WLAN beacon interval for Bluetooth™ operations. From a

timing perspective, the medium assignment alternates between usage following WLAN

procedures and usage following Bluetooth™ procedures.

The timing synchronization between the WLAN and the STA2416 is done by the HW signal

MEDIUM_FREE.

STA2416

D05AU1627

WLAN

RF_NOT_ALLOWED

Table 10.

WLAN HW signal assignment

WLAN

Scenario 1:

PTA

Scenario 2:

WLAN master

Scenario 3:

BT master

Scenario 4:

2-wire

Scenario 5:

AWMA

WLAN 1

TX_ CONFIRM

BT_RF_NOT_

ALLOWED

Not used

BT_RF_NOT_

ALLOWED

MEDIUM_FREE

WLAN 2

TX_ REQUEST

Not used

WLAN_RF_ NOT_

ALLOWED

WLAN_RF_ NOT_

ALLOWED

Not used

WLAN 3

STATUS

Not used

WLAN 4

OPTIONAL_ SIGNAL

Not used

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