STA2500D datasheet(40/57 Pages) STMICROELECTRONICS

Part #	STA2500D

Description	Bluetooth??V2.1 EDR ("Lisbon") for automotive applications

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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General specification

STA2500D

40/57

Doc ID 16067 Rev 1

6.13.5

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 STA2500D is done by the HW signal

MEDIUM_FREE.

Table 25.

WLAN HW signal assignment

WLAN control

signal

(see also

Table 29)

Scenario 1:

PTA

Scenario 2:

WLAN master

Scenario 3:

BT master

Scenario 4:2-wire

Scenario 5:

AWMA

WLAN 1

RF_CONFIRM

BT_RF_NOT_

ALLOWED

Not used

BT_RF_NOT_

ALLOWED

MEDIUM_F

REE

WLAN 2

RF_REQUEST

Not used

WLAN_RF_NOT_

ALLOWED

WLAN_RF_NOT_

ALLOWED

Not used

WLAN 3

STATUS

Not used

WLAN 4

FREQ

(optional)

Not used

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