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BT85x Series
Datasheet
8.3.5. Multiplexed Bluetooth Over PCM
Bluetooth supports multiple audio streams within the Bluetooth channel and both 16 kHz and 8 kHz streams can
be multiplexed. This mode of operation is only supported when the Bluetooth host is the master.
Figure 6
shows
the operation of the multiplexed transport with three simultaneous SCO connections. To accommodate
additional SCO channels, the transport clock speed is increased. To change between modes of operation, the
transport must be halted and restarted in the new configuration.
Figure 6: Functional multiples data diagram
8.3.6. Burst PCM Mode
In this mode of operation, the PCM bus runs at a significantly higher rate of operation to allow the host to duty
cycle its operation and save current. In this mode of operation, the PCM bus can operate at a rate of up to 24
MHz. This mode of operation is initiated with an HCI command from the host.
Figure 7
and
Table 13
shows PCM Burst mode timing diagram and specifications for the receive-only mode of
short-frame sync.
Figure 7: PCM burst mode timing (Receive Only, Short Frame Sync)
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