CYW4343X
6.2 Transmit Path
Baseband data is modulated and upconverted to the 2.4 GHz ISM band. A linear on-chip power amplifier is included, which is capa-
ble of delivering high output powers while meeting IEEE 802.11b/g/n specifications without the need for an external PA. This PA is
supplied by an internal LDO that is directly supplied by VBAT, thereby eliminating the need for a separate PALDO. Closed-loop out-
put power control is integrated.
6.3 Calibration
The CYW4343X features dynamic on-chip calibration, eliminating process variation across components. This enables the
CYW4343X to be used in high-volume applications because calibration routines are not required during manufacturing testing.
These calibration routines are performed periodically during normal radio operation. Automatic calibration examples include base-
band filter calibration for optimum transmit and receive performance and LOFT calibration for leakage reduction. In addition, I/Q cal-
ibration, R calibration, and VCO calibration are performed on-chip.
7. Bluetooth + FM Subsystem Overview
The Cypress CYW4343X is a Bluetooth 4.1-compliant, baseband processor and 2.4 GHz transceiver with an integrated FM/RDS/
RBDS receiver. It features the highest level of integration and eliminates all critical external components, thus minimizing the foot-
print, power consumption, and system cost of a Bluetooth plus FM radio solution.
The CYW4343X is the optimal solution for any Bluetooth voice and/or data application that also requires an FM radio receiver. The
Bluetooth subsystem presents a standard Host Controller Interface (HCI) via a high speed UART and PCM interface for audio. The
FM subsystem supports the HCI control interface as well as I2S, PCM, and stereo analog interfaces. The CYW4343X incorporates
all Bluetooth 4.1 features including secure simple pairing, sniff subrating, and encryption pause and resume.
The CYW4343X Bluetooth radio transceiver provides enhanced radio performance to meet the most stringent mobile phone tem-
perature 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, NFC, and cellular
radios.
The Bluetooth transmitter also features a Class 1 power amplifier with Class 2 capability.
7.1 Features
Major Bluetooth features of the CYW4343X include:
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Supports key features of upcoming Bluetooth standards
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Fully supports Bluetooth Core Specification version 4.1 plus enhanced data rate (EDR) features:
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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)
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UART baud rates up to 4 Mbps
Supports all Bluetooth 4.1 packet types
Supports maximum Bluetooth data rates over HCI UART
Multipoint operation with up to seven active slaves
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Maximum of seven simultaneous active ACL links
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Maximum of three simultaneous active SCO and eSCO connections with scatternet support
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Trigger Beacon 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
Document No. 002-14797 Rev. *H
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