PRELIMINARY
CYW43340
4. Bluetooth Subsystem Overview
The Cypress CYW43340 is a Bluetooth 4.0-compliant, baseband processor/2.4 GHz transceiver.
The CYW43340 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 CYW43340 incorporates all Bluetooth 4.0 features
including BR/EDR and LE.
The CYW43340 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 CYW43340 include:
■ Supports key features of upcoming Bluetooth standards
■ Fully supports Bluetooth Core Specification version 4.0 features
■ UART baud rates up to 4 Mbps
■ Supports all Bluetooth 4.0 packet types
■ Supports maximum Bluetooth data rates over HCI UART
■ 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” on page 18)
■ Channel quality driven data rate and packet type selection
■ Standard Bluetooth test modes
■ Extended radio and production test mode features
■ Full support for power savings modes
❐ Bluetooth clock request
❐ Bluetooth standard sniff
❐ Deep-sleep modes and software regulator shutdown
■ TCXO input and auto-detection of all standard handset clock frequencies. Also supports a low-power crystal, which can be used
during power save mode for better timing accuracy.
Document Number: 002-14943 Rev. *L
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