BCM20705 Data Sheet
Major Features
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High-speed HCI UART transport support
– H4 five-wire UART (four signal wires, one ground wire)
– H5 three-wire UART (two signal wires, one ground wire)
– Maximum UART baud rates of 4 Mbps
– Low-power out-of-band BT_WAKE and HOST_WAKE signaling
– VSC from host transport to UART
– Proprietary compressing scheme (allows more than 2 simultaneous A2DP packets and up to 5 devices
at a time)
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HCI USB transport support
– USB version 2.0 full-speed compliant interface
– Full USB hub
– UHE (proprietary method for emulating a Human Interface Device (HID) at system bootup)
Channel Quality-Driven Data Rate (CQDDR) and packet type selection
Standard Bluetooth test modes
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Extended radio and production test mode features
Full support for power savings modes:
– Bluetooth standard sniff
– Deep sleep modes and regulator shutdown
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Supports Wide-Band Speech (WBS) over PCM and Packet Loss Concealment (PLC) for better audio
quality
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2-, 3-, and 4-wire coexistence
Power Amplifier (PA) shutdown for externally controlled coexistence, such as WIMAX
Built-in LPO clock or operation using an external LPO clock
TCXO input and auto-detection of all standard handset clock frequencies (supports low-power crystal,
which can be used during Power Saving mode with better timing accuracy)
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OR gate for combining a host clock request with a Bluetooth clock request (operates even when the
Bluetooth core logic is powered off)
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Larger patch RAM space to support future enhancements
Serial flash Interface with native support for devices from several manufacturers
One-Time Programmable (OTP) memory
Broadcom®
Bluetooth Transceiver and Baseband Processor
November 13, 2014 • MCS20705-DS104-R
Page 10
BROADCOM CONFIDENTIAL
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