BCM88335 Data Sheet
Link Control Layer
Link Control Layer
The link control layer is part of the Bluetooth link control functions that are implemented in dedicated logic in the
link control unit (LCU). This layer consists of the command controller that takes commands from the software,
and other controllers that are activated or configured by the command controller to perform the link control tasks.
Each task performs a different state in the Bluetooth Link Controller.
•
Major states:
– Standby
– Connection
Substates:
– Page
•
– Page Scan
– Inquiry
– Inquiry Scan
– Sniff
Test Mode Support
The BCM88335 fully supports Bluetooth Test mode as described in Part I:1 of the Specification of the Bluetooth
System Version 3.0. This includes the transmitter tests, normal and delayed loopback tests, and reduced
hopping sequence.
In addition to the standard Bluetooth Test Mode, the BCM88335 also supports enhanced testing features to
simplify RF debugging, qualification, and type-approval testing. These features include:
•
Fixed-frequency carrier-wave (unmodulated) transmission
– Simplifies some type-approval measurements (Japan)
– Aids in transmitter performance analysis
•
Fixed-frequency constant-receiver mode
– Receiver output directed to I/O pin
– Allows for direct BER measurements using standard RF test equipment
– Facilitates spurious emissions testing for receive mode
Fixed frequency constant transmission
•
– Eight-bit fixed pattern or PRBS-9
– Enables modulated signal measurements with standard RF test equipment
Broadcom®
September 23, 2015 • 88335-DS100-R
Page 35
BROADCOM CONFIDENTIAL
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