sta2416 STMicroelectronics, sta2416 Datasheet - Page 25

• Manufacturer Part Number: sta2416
• Description: Bluetooth?? Baseband With Integrated Flash
• Manufacturer: STMicroelectronics

STA2416
5.9
5.10
5.10.1
V1.2 detailed functions - quality of service
User perspective - quality of service
Small changes to the BT1.1 spec regarding quality of service (QoS) makes a large
difference by allowing all QoS parameters to be communicated over HCI to the link manager
that enables efficient bandwidth management. Below is a short list of user perspectives.
"
"
Low-power modes
To save power, two low-power modes are supported. Depending on the Bluetooth
host activity, the STA2416 autonomously decides to use Sleep mode or Deep Sleep mode.
Table 10.
1. Deep Sleep mode is not compatible with a USB transport layer
Sniff or park
The STA2416 is in active mode with a Bluetooth
concluded the SNIFF or the PARK is programmed. Once one of these two states is entered
the STA2416 goes in Sleep mode. After that, the host may decide to place the STA2416 in
Deep Sleep mode by putting the UART link in low-power mode. The Deep Sleep mode
allows smaller power consumption. When the STA2416 needs to send or receive a packet
(for example, at T
mode for the needed transmission/reception. Immediately afterwards it will go back to the
Deep Sleep mode. If some HCI transmission is needed, the UART link will be reactivated,
using one of the two ways explained in 7.5, and the STA2416 will move from the Deep Sleep
mode to the Sleep mode.
Sleep mode
Deep sleep mode
Low power mode
Flush time-out: 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.
Simple latency control: allows the host to set the poll interval. It provides enough
support for HID devices mixed with other traffic in the piconet.
Low-power modes
(1)
SNIFF
or at the beacon instant) it will require the clock and it will go in active
The STA2416:
– accepts HCI commands from the host
– supports page- and inquiry scans
– supports Bluetooth
– can transfer data over Bluetooth links
– the system clock is still active in part of the design
The STA2416:
– 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
– does not transfer data over Bluetooth links
– the system clock is not active in any part of the design
®
®
links that are in Sniff, Hold or Park
links that are in Sniff, Hold or Park
®
connection, once the connection is
Description
General specification
®
and the
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