CYW4339芯片：集成5G Wi-Fi、IEEE 802.11ac与蓝牙4.1的全面解决方案

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CYW4339是一款由Cypress Semiconductor Corporation生产的高度集成的单芯片设备，专为物联网（IoT）和便携式无线系统设计，集成了单流IEEE 802.11ac MAC（媒体访问控制）、基带和射频功能，以及蓝牙4.1技术。这款芯片在802.11ac模式下表现出色，提供MCS0到MCS9（包括256 QAM调制）的速率支持，可以在20 MHz、40 MHz和80 MHz信道上实现高达433.3 Mbps的数据传输速度。这意味着它不仅兼容传统的802.11a/b/g/n标准，还具备了高速无线通信能力。 CYW4339芯片内建了2.4 GHz和5 GHz的发射和接收低噪声放大器，确保了信号的高效传输。此外，它还支持外部功率放大器（PA）、低噪声放大器（LNA）以及天线多样性技术，提供了灵活性和可扩展性。在无线局域网（WLAN）部分，芯片提供了多种主机接口选项，包括SDIO v3.0接口（兼容4位和1位模式），以及PCIe Gen 1接口（符合3.0标准），便于与不同类型的系统连接。对于蓝牙功能，CYW4339提供了高速的4线UART（通用异步接收/发送器）和USB 2.0全速（12 Mbps）接口，使得蓝牙通信能够快速稳定地进行。这些特性使得该芯片适用于各种应用场景，如智能家居设备、移动设备、工业监控系统等，能够满足现代无线设备对高速、低功耗和多协议连接的需求。 CYW4339芯片作为一款先进的无线通信解决方案，其集成度高、性能强大且接口丰富，是构建高效、兼容性强的无线网络和蓝牙应用的理想选择。开发人员可以根据项目需求选择合适的接口和配置，以实现最佳的无线连接体验。

Document No. 002-14784 Rev. *H Page 16 of 133

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CYW4339

3.4 External 32.768 kHz Low-Power Oscillator

The CYW4339 uses a secondary low-frequency clock for low-power-mode timing. Either the internal low-precision LPO or an external

32.768 kHz precision oscillator is required. The internal LPO frequency range is approximately 33 kHz ± 30% over process, voltage,

and temperature, which is adequate for some applications. However, one trade-off caused by this wide LPO tolerance is a small

current consumption increase during power save mode that is incurred by the need to wake up earlier to avoid missing beacons.

Whenever possible, the preferred approach is to use a precision external 32.768 kHz clock that meets the requirements listed in

Tabl e 3 .

Table 3. External 32.768 kHz Sleep Clock Specifications

Parameter LPO Clock Units

Nominal input frequency 32.768 kHz

Frequency accuracy ±200 ppm

Duty cycle 30–70 %

Input signal amplitude 200–1800 mV, p-p

Signal type Square-wave or sine-wave –

Input impedance

1. When power is applied or switched off.

>100k

Ω

Clock jitter (during initial start-up) <10,000 ppm

Document No. 002-14784 Rev. *H Page 17 of 133

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CYW4339

4. Bluetooth Subsystem Overview

The Cypress CYW4339 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 plus Wi-Fi system.

The CYW4339 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 CYW4339 incorporates all Bluetooth 4.1 features

including Secure Simple Pairing, Sniff Subrating, and Encryption Pause and Resume.

The CYW4339 Bluetooth radio transceiver provides enhanced radio performance to meet the most stringent mobile phone

temperature applications and the tightest integration into 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 CYW4339 include:

■ Supports key features of upcoming Bluetooth standards

■ Fully supports Bluetooth Core Specification version 4.1 + (Enhanced Data Rate) 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 Bluetooth 4.1 packet types

■ Supports maximum Bluetooth data rates over HCI UART

■ BT supports full-speed USB version 1.1 in the FCBGA package

■ 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 Cypress 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

■ Full support for power savings modes

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CYW4339

❐ Bluetooth clock request

❐ Bluetooth standard sniff

❐ Deep-sleep modes and software regulator shutdown

■ TCXO input and autodetection of all standard handset clock frequencies. Also supports a low-power crystal, which can be used

during power save mode for better timing accuracy.

4.2 Bluetooth Radio

The CYW4339 has an integrated radio transceiver that has been optimized for use in 2.4 GHz Bluetooth wireless systems. It has been

designed to provide low-power, low-cost, robust communications for applications operating in the globally available 2.4 GHz

unlicensed ISM band. It is fully compliant with the Bluetooth Radio Specification and EDR specification and meets or exceeds the

requirements to provide the highest communication link quality.

4.2.1 Transmit

The CYW4339 features a fully integrated zero-IF transmitter. The baseband transmit data is GFSK-modulated in the modem block

and upconverted to the 2.4 GHz ISM band in the transmitter path. The transmitter path performs signal filtering, I/Q upconversion,

output power amplification, and RF filtering. The transmitter path also incorporates /4-DQPSK and 8-DPSK modulations for 2 Mbps

and 3 Mbps EDR support, respectively. The transmitter section is compatible to the Bluetooth Low Energy specification. The trans-

mitter PA bias can also be adjusted to provide Bluetooth Class 1 or Class 2 operation.

4.2.2 Digital Modulator

The digital modulator performs the data modulation and filtering required for the GFSK, /4-DQPSK, and

8-DPSK signal. The fully digital modulator minimizes any frequency drift or anomalies in the modulation characteristics of the trans-

mitted signal and is much more stable than direct VCO modulation schemes.

4.2.3 Digital Demodulator and Bit Synchronizer

The digital demodulator and bit synchronizer take the low-IF received signal and perform an optimal frequency tracking and bit-

synchronization algorithm.

4.2.4 Power Amplifier

The fully integrated PA supports Class 1 or Class 2 output using a highly linearized, temperature-compensated design. This provides

greater flexibility in front-end matching and filtering. Due to the linear nature of the PA combined with some integrated filtering, external

filtering is required to meet the Bluetooth and regulatory harmonic and spurious requirements. For integrated handset applications in

which Bluetooth is integrated next to the cellular radio, external filtering can be applied to achieve near-thermal-noise levels for

spurious and radiated noise emissions. The transmitter features a sophisticated on-chip transmit signal strength indicator (TSSI) block

to keep the absolute output power variation within a tight range across process, voltage, and temperature.

4.2.5 Receiver

The receiver path uses a low-IF scheme to downconvert the received signal for demodulation in the digital demodulator and bit

synchronizer. The receiver path provides a high degree of linearity, an extended dynamic range, and high-order on-chip channel

filtering to ensure reliable operation in the noisy 2.4 GHz ISM band. The front-end topology, with built-in out-of-band attenuation,

enables the CYW4339 to be used in most applications with minimal off-chip filtering. For integrated handset operation, in which the

Bluetooth function is integrated close to the cellular transmitter, external filtering is required to eliminate the desensitization of the

receiver by the cellular transmit signal.

4.2.6 Digital Demodulator and Bit Synchronizer

The digital demodulator and bit synchronizer take the low-IF received signal and perform an optimal frequency tracking and bit

synchronization algorithm.

4.2.7 Receiver Signal Strength Indicator

The radio portion of the CYW4339 provides a Receiver Signal Strength Indicator (RSSI) signal to the baseband, so that the controller

can determine whether the transmitter should increase or decrease its output power.

Document No. 002-14784 Rev. *H Page 20 of 133

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CYW4339

5. Bluetooth Baseband Core

The Bluetooth Baseband Core (BBC) implements all of the time critical functions required for high-performance Bluetooth operation.

The BBC manages the buffering, segmentation, and routing of data for all connections. It also buffers data that passes through it,

handles data flow control, schedules SCO/ACL TX/RX transactions, monitors Bluetooth slot usage, optimally segments and packages

data into baseband packets, manages connection status indicators, and composes and decodes HCI packets. In addition to these

functions, it independently handles HCI event types, and HCI command types.

The following transmit and receive functions are also implemented in the BBC hardware to increase reliability and security of the TX/

RX data:

■ Symbol timing recovery, data deframing, forward error correction (FEC), header error control (HEC), cyclic redundancy check

(CRC), data decryption, and data dewhitening in the receiver.

■ Data framing, FEC generation, HEC generation, CRC generation, key generation, data encryption, and data whitening in the

transmitter.

5.1 Bluetooth 4.1 Features

The BBC supports all Bluetooth 4.1 features, with the following benefits:

■ Dual-mode bluetooth Low Energy (BT and BLE operation)

■ Extended Inquiry Response (EIR): Shortens the time to retrieve the device name, specific profile, and operating mode.

■ Encryption Pause Resume (EPR): Enables the use of Bluetooth technology in a much more secure environment.

■ Sniff Subrating (SSR): Optimizes power consumption for low duty cycle asymmetric data flow, which subsequently extends bat-

tery life.

■ Secure Simple Pairing (SSP): Reduces the number of steps for connecting two devices, with minimal or no user interaction

required.

■ Link Supervision Time Out (LSTO): Additional commands added to HCI and Link Management Protocol (LMP) for improved link

time-out supervision.

■ QoS enhancements: Changes to data traffic control, which results in better link performance. Audio, human interface device

(HID), bulk traffic, SCO, and enhanced SCO (eSCO) are improved with the erroneous data (ED) and packet boundary flag (PBF)

enhancements.

5.2 Bluetooth Low Energy

The CYW4339 supports the Bluetooth Low Energy operating mode.

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