STLC2416 View Datasheet(PDF) - STMicroelectronics
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Description
MFG CO.
'STLC2416' PDF : 27 Pages View PDF
STLC2416
tooth voice communication while an intensive WLAN communication is ongoing.
Several algorithms have been implemented in order to provide a maximum of flexibility and efficiency for
the priority handling. Those algorithms can be activated via specific HCI commands.
The combination of a time division multiplexing techniques to share the bandwidth in case of simultaneous
operations and of the priority mechanism avoid the interference due to packet collision and it allows the
maximization of the 2.4 GHz ISM bandwidth usage for both devices while preserving the quality of some
critical types of link.
7.12.2 Algorithm 2: WLAN master
In case the STLC2416 has to cooperate, in a collocated scenario, with a WLAN chip not supporting a PTA
based algorithm, it's possible to put in place a simpler mechanism.
The interface is reduced to 1 line:
STLC2416
RF_NOT_ALLOWED
WLAN
When the WLAN has to operate, it alerts HIGH the RF_NOT_ALLOWED signal and the STLC2416 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 but
cannot provide guaranteed quality over the Bluetooth links.
7.12.3 Algorithm 3: Bluetooth master
This algorithm represents the symmetrical case of section 7.12.2. Also in this case the interface is re-
duced to 1 line:
STLC2416
RF_NOT_ALLOWED
WLAN
When the STLC2416 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 pro-
vides high quality for all Bluetooth links but cannot provide guaranteed quality over the WLAN links.
7.12.4 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.
7.12.5 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 Blue-
tooth procedures.
The timing synchronization between the WLAN and the STLC2416 is done by the HW signal
MEDIUM_FREE.
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