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BCM20705 Datasheet, PDF (11/67 Pages) Cypress Semiconductor – Single-Chip Bluetooth Transceiver and Baseband Processor | |||
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BCM20705 Data Sheet
Major Features
⢠High-speed HCI UART transport support
â H4 five-wire UART (four signal wires, one ground wire)
â H5 three-wire UART (two signal wires, one ground wire)
â Maximum UART baud rates of 4 Mbps
â Low-power out-of-band BT_WAKE and HOST_WAKE signaling
â VSC from host transport to UART
â Proprietary compressing scheme (allows more than 2 simultaneous A2DP packets and up to 5 devices
at a time)
⢠HCI USB transport support
â USB version 2.0 full-speed compliant interface
â Full USB hub
â 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
⢠Extended radio and production test mode features
⢠Full support for power savings modes:
â Bluetooth standard sniff
â Deep sleep modes and regulator shutdown
⢠Supports Wide-Band Speech (WBS) over PCM and Packet Loss Concealment (PLC) for better audio
quality
⢠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)
⢠OR gate for combining a host clock request with a Bluetooth clock request (operates even when the
Bluetooth core logic is powered off)
⢠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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