PRELIMINARY
CYW43438
1.2 Features
The CYW43438 supports the following WLAN, Bluetooth, and FM features:
■ IEEE 802.11b/g/n single-band radio with an internal power amplifier, LNA, and T/R switch
■ Bluetooth v4.1 with integrated Class 1 PA
■ Concurrent Bluetooth, FM (RX) RDS/RBDS, and WLAN operation
■ On-chip WLAN driver execution capable of supporting IEEE 802.11 functionality
■ Simultaneous BT/WLAN reception with a single antenna
■ WLAN host interface options:
❐ SDIO v2.0, including default and high-speed timing.
❐ gSPI—up to a 50 MHz clock rate
■ BT UART (up to 4 Mbps) host digital interface that can be used concurrently with the above WLAN host interfaces.
■ ECI—enhanced coexistence support, which coordinates BT SCO transmissions around WLAN receptions.
■ PCM for FM/BT audio, HCI for FM block control
■ HCI high-speed UART (H4 and H5) transport support
■ Wideband speech support (16 bits, 16 kHz sampling PCM, through PCM interfaces)
■ Bluetooth SmartAudio® technology improves voice and music quality to headsets.
■ Bluetooth low power inquiry and page scan
■ Bluetooth Low Energy (BLE) support
■ Bluetooth Packet Loss Concealment (PLC)
■ FM advanced internal antenna support
■ FM auto searching/tuning functions
■ FM multiple audio routing options: PCM, eSCO, and A2DP
■ FM mono-stereo blending and switching, and soft mute support
■ FM audio pause detection support
■ Multiple simultaneous A2DP audio streams
■ FM over Bluetooth operation and on-chip stereo headset emulation
1.3 Standards Compliance
The CYW43438 supports the following standards:
■ Bluetooth 2.1 + EDR
■ Bluetooth 3.0
■ Bluetooth 4.1 (Bluetooth Low Energy)
■ 65 MHz to 108 MHz FM bands (US, Europe, and Japan)
■ IEEE 802.11n—Handheld Device Class (Section 11)
■ IEEE 802.11b
■ IEEE 802.11g
■ IEEE 802.11d
■ IEEE 802.11h
■ IEEE 802.11i
■ The CYW43438 will support the following future drafts/standards:
■ IEEE 802.11r — Fast Roaming (between APs)
Document Number: 002-14796 Rev. *K
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