STLC2416

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7.8 V1.2 detailed functionality - Faster Connection

User Perspective - Faster Connection

This feature gives the User about 65% faster connection on average when enabled compared to Bluetooth

spec 1.1 connection procedure.

Technical perspective - Faster Connection

The faster Inquiry functionality is based on a removed/shortened random back off and also a new Inter-

laced Inquiry scan scheme.

The faster Page functionality is based on Interlaced Page Scan.

7.9 V1.2 detailed functionality - Quality of Service

User Perspective - Quality of Service

Small changes to the BT1.1 spec regarding Quality of Service makes a large difference by allowing all

QoS parameters to be communicated over HCI to the link manager that enables efficient BW manage-

ment. Here after a short list of user perspectives:

1) Flush timeout: enables time-bounded traffic such as video streaming to become more robust when the

channel degrades. It sets the maximum delay of an L2CAP frame. It does not enable multiple streams

in one piconet, or heavy data transfer at the same time.

2) Simple latency control: allows the host to set the poll interval. Provides enough support for HID devic-

es mixed with other traffic in the piconet.

7.10 Low power modes

To save power, two low power modes are supported. Depending of the Bluetooth and of the Host's activity,

the STLC2416 autonomously decides to use Sleep Mode or Deep Sleep Mode.

Table 10. Low power modes

Some examples of the low power modes usage:

7.10.1 SNIFF OR PARK

The STLC2416 is in active mode with a Bluetooth connection, once the connection is concluded the SNIFF

or the PARK is programmed. Once one of these two states is entered the STLC2416 goes in Sleep Mode.

After that, the Host may decide to place the STLC2416 in Deep Sleep Mode by putting the UART LINK in

low power mode. The Deep Sleep Mode allows smaller power consumption. When the STLC2416 needs

active mode for the needed transmission/reception. Immediately afterwards it will go back to the Deep

Low power mode

Description

Sleep Mode

The STLC2416:

- Accepts HCI commands from the Host.

- Supports page- and inquiry scans.

- Supports Bluetooth links that are in Sniff, Hold or Park.

- Can transfer data over Bluetooth links.

- The system clock is still active in part of the design.

Deep Sleep Mode

The STLC2416:

- Does not accept HCI commands from the Host.

- Keeps track of page- and inquiry scan activities.

Switches between sleep and active mode when it is time to scan.

- Supports Bluetooth links that are in Sniff, Hold or Park.

- Does not transfer data over Bluetooth links.

- The system clock is not active in any part of the design.

Note: Deep Sleep mode is not compatible with a USB transport layer.