BCM20705 Datasheet, PDF (17/67 Pages) Cypress Semiconductor – Single-Chip Bluetooth Transceiver and Baseband Processor

BCM20705 Data Sheet
Bluetooth Baseband Core
Section 3: Bluetooth Baseband Core
The Bluetooth Baseband Core (BBC) implements the time critical functions required for high-performance
Bluetooth and Low Energy operation. The BBC manages buffering, segmentation, and data routing for all
connections. It also buffers data that passes through it, handles data flow control, schedules SCO/ACL Tx/Rx
transactions, monitors Bluetooth slot usage, optimally segments and packages data into baseband packets,
manages connection status indicators, and composes and decodes HCI packets. In addition to these functions,
it independently handles HCI event types and HCI command types.
Transmit and Receive Functions
The following transmit and receive functions are implemented in the BBC hardware to increase the reliability
and security of the Tx/Rx data before sending the data over the air:
In the transmitter:
• Data framing
• Forward Error Correction (FEC) generation
• Header Error Control (HEC) generation
• Cyclic Redundancy Check (CRC) generation
• Key generation
• Data encryption
• Data whitening
In the receiver:
• Symbol timing recovery
• Data deframing
• FEC
• HEC
• CRC
• Data decryption
• Data dewhitening
Broadcom®
Bluetooth Transceiver and Baseband Processor
November 13, 2014 • MCS20705-DS104-R
Page 16
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