OVERVIEW

WS9654AFEM is single chip Bluetooth solution for applications include smart speakers, wireless headsets,
wireless speaker phones, wireless or wired soundbars. It consists of a main chip with digital parts and RF, a power
management unit and analog signal processing chip, a flash for code storage, and a RF PA chip for radio power
enhancement. Moreover, Bluetooth transceivers, baseband, modem, SRAM, via ROM, internal flash and external
flash controller, and power management unit are all integrated in the same chip. It is fully compliant with all the
mandatory features of Bluetooth version 5.3 + EDR(LE Audio Ready) specification.

FEATURES
 High performance 32-bit user MCU
processors running at up to 128MHz,
Overclocking can reach 192MHz.
 High performance 32-bit bluetooth MCU
processors running at up to 128MHz,
Overclocking can reach 192MHz.
 320KB Data SRAM+64KB Code SRAM
+432KB Cache shared by 2 core and DSP.
 32bit DSP running at up to 256MHz with dual
MAC. Overclocking can reach 384MHz when
the DVDD12 is configured to 1.325V.
 4MB internal flash.
 Support external SPI flash,only for data
storage.
 Cache for executing code in internal SPI
flash or external SPI flash.
 Booting from ROM.

 Internal 32KHz oscillator for low power
operation.
 UART interface with programmable baud
rate up to 3Mbps for HCI communication.
 I 2 C interface.
 Two independent I2S interface for digital
audio transferring.
 Sup port USB 2.1 OTG and USB audio
mode
 LCD interface. Support 3/4 wire SPI
interface and support 8 bit 8080/6800
interface.
 Fully qualified Bluetooth v 5 3 + EDR feature
including eSCO and AFH.
 9 5 dBm Rx sensitivity and +9dBm Tx output
power capability
 Allows full speed data transfer with full
piconet support, mixed voice and data,
including all EDR packet types.
 Logic for forward error correction, header
error control, access code correlation, CRC,
demodulation, encryption bit stream
generation, and whitening and transmit pulse
shaping.
 Audio transcoders for A law, μ law and linear
voice from host and A law, μ la w and CVSD
voice over air.
 SPP support. Increased SPP protocol, which
is used to transmit commands and data,
realize interaction control with other
equipment that supports SPP.
 AT Command support. Communicate with
MCU through the UART controlled by the
MC U or convert the command to Bluetooth
command which is sent to the mobile phone
to control the phone by MCU.
 Two Mic Acoustic Noise Cancellation. Used
to eliminate the stationary and
non stationary noise on T X .
 Two microphone echo Cancellation. Used to
c ancel acoustic echo.
 Two microphone noise suppression. Used
to reduce stationary noise on Tx and Rx
 Packet Loss Concealment. Used to restore
audio quality in difficult RF environment on
Rx.
 Equalizer. Supports six arbitrarily frequency
bands and the band width can be adjusted.
 Automatic Gain Control. Perform automatic
volume adjustment of the signal on Tx and
Rx.
 Speech Tone. Encoded with SBC (Sub Band
Codec) format and stored in FLASH, to
indicate general event from headset by
specified tone directly.
 A2D P V1.3 AVRCP V1.6 H FP 1.7 HSP V1.2
 Advanced multi point support. Allows
connecting 2 devices (either phones or pads)
and handling multiple calls or music at the
same time.
 Battery monitor designed for smart phones.
 Watch dog for link loss alarm.
 QFN88L pa ckage.
 SPI o peration voltage is 3.3V or 1.8V
 Working temperature ranges from 40 to
+80
 Low radio power realizes 10+ meters
communication.
 Fast charger: 30 minutes charging time.
 No Balun filter required for connection.
 Support SPDIF Output.
 LE audio and dual mode audio ready.
 Support Broadcasting
 Support BLE.
 S upport OTA with GATT over BR/EDR
 S upport Low latency mode
 AD C performance increased to 106dB
 Coding space in BT is 2M in TOP is 1M
 OTA speed improved from BLE throughput to
BT throughput
 Support ECSB/ACSB 1 N audio.