ADVANCE
CYW43570
4. Bluetooth Overview
The CYW43570 is a Bluetooth 4.1 + EDR-compliant, baseband processor/2.4 GHz transceiver. It features the highest level of
integration and eliminates all critical external components, thus minimizing the footprint, power consumption, and system cost of a
Bluetooth radio solution.
The CYW43570 is the optimal solution for any Bluetooth voice and/or data application. The Bluetooth subsystem presents a standard
host controller interface (HCI) via a high-speed UART and PCM for audio. The CYW43570 incorporates all Bluetooth 4.1 + EDR
features including secure simple pairing, sniff subrating, and encryption pause and resume.
The CYW43570 Bluetooth radio transceiver provides enhanced radio performance to meet the most stringent mobile phone
temperature applications and the tightest integration into mobile handsets and portable devices. It is fully compatible with any of the
standard TCXO frequencies and provides full radio compatibility to operate simultaneously with GPS, WLAN, and cellular radios.
The Bluetooth transmitter also features a Class 1 power amplifier with Class 2 capability.
4.1 Features
Major Bluetooth features of the CYW43570 include:
■ Supports key features of upcoming Bluetooth standards
■ Fully supports Bluetooth Core Specification version 4.1 + EDR features:
❐ Adaptive frequency hopping (AFH)
❐ Quality of service (QoS)
❐ Extended synchronous connections (eSCO)—voice connections
❐ Fast connect (interlaced page and inquiry scans)
❐ Secure simple pairing (SSP)
❐ Sniff subrating (SSR)
❐ Encryption pause resume (EPR)
❐ Extended inquiry response (EIR)
❐ Link supervision timeout (LST)
■ UART baud rates up to 4 Mbps
■ Supports all Bluetooth 4.1 + EDR packet types
■ Maximum Bluetooth data rates over HCI UART (interface capable but not currently supported in the software driver)
■ BT supports full-speed USB 2.0-compliant interface
■ Multipoint operation with up to seven active slaves
❐ Maximum of seven simultaneous active ACL links
❐ Maximum of three simultaneous active SCO and eSCO connections with scatternet support
■ Trigger Broadcom fast connect (TBFC)
■ Narrowband and wideband packet loss concealment
■ Scatternet operation with up to four active piconets with background scan and support for scatter mode
■ High-speed HCI UART transport support with low-power out-of-band BT_DEV_WAKE and BT_HOST_WAKE signaling (see Host
Controller Power Management)
■ Channel quality driven data rate and packet type selection
■ Standard Bluetooth test modes
■ Extended radio and production test mode features
Document Number: 002-15054 Rev. *I
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