BCM20707 Preliminary Data Sheet
Functional Description
Section 1: Functional Description
Bluetooth Baseband Core
The Bluetooth Baseband Core (BBC) implements all of the time-critical functions required for high-performance
Bluetooth operation. The BBC manages the buffering, segmentation, and routing of data for all connections. It
also buffers data that passes through it, handles data flow control, schedules SCO/ACL and 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. The following transmit and receive functions
are also implemented in the BBC hardware to increase reliability and security of the TX/RX data before sending
over the air:
•
Symbol timing recovery, data deframing, forward error correction (FEC), header error control (HEC), cyclic
redundancy check (CRC), data decryption, and data dewhitening in the receiver.
•
Data framing, FEC generation, HEC generation, CRC generation, key generation, data encryption, and
data whitening in the transmitter.
Bluetooth 4.2 Features
Both the BCM20707 36-pin WLBGA package and the 49-pin FBGA package support all Bluetooth 4.2 and
legacy features, with the following benefits:
•
•
Dual-mode Bluetooth low energy (BT and BLE operation)
Extended inquiry response (EIR): Shortens the time to retrieve the device name, specific profile, and
operating mode.
•
•
•
•
•
Encryption pause resume (EPR): Enables the use of Bluetooth technology in a much more secure
environment.
Sniff subrating (SSR): Optimizes power consumption for low duty cycle asymmetric data flow, which
subsequently extends battery life.
Secure simple pairing (SSP): Reduces the number of steps for connecting two devices, with minimal or no
user interaction required.
Link supervision time out (LSTO): Additional commands added to HCI and Link Management Protocol
(LMP) for improved link timeout supervision.
Quality of service (QoS) enhancements: Changes to data traffic control, which results in better link
performance. Audio, human interface device (HID), bulk traffic, SCO, and enhanced SCO (eSCO) are
improved with the erroneous data (ED) and packet boundary flag (PBF) enhancements.
•
•
•
•
•
•
•
Secure connections (BR/EDR)
Fast advertising interval
Piconet clock adjust
Connectionless broadcast
LE privacy v1.1
Low duty cycle directed advertising
LE dual mode topology
Broadcom®
Bluetooth SoC
May 27, 2016 • 20707-DS206-R
Page 10
BROADCOM CONFIDENTIAL
CYPRESS [ CYPRESS ]
