CYW4343X
■
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 43)
■
■
■
■
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.
Major FM Radio features include:
■
■
■
65 MHz to 108 MHz FM bands supported (US, Europe, and Japan)
FM subsystem control using the Bluetooth HCI interface
FM subsystem operates from reference clock inputs.
■
■
Improved audio interface capabilities with full-featured bidirectional PCM, I2S, and stereo analog output.
I2S can be master or slave.
FM Receiver-Specific Features Include:
■
■
■
■
■
■
■
■
Excellent FM radio performance with 1 µV sensitivity for 26 dB (S+N)/N
Signal-dependent stereo/mono blending
Signal dependent soft mute
Auto search and tuning modes
Audio silence detection
RSSI and IF frequency status indicators
RDS and RBDS demodulator and decoder with filter and buffering functions
Automatic frequency jump
7.2 Bluetooth Radio
The CYW4343X 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 of service.
7.2.1 Transmit
The CYW4343X 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 has signal filters, an I/Q upconverter, an out-
put power amplifier, and RF filters. The transmitter path also incorporates /4–DQPSK for 2 Mbps and 8–DPSK for 3 Mbps to sup-
port EDR. The transmitter section is compatible with the Bluetooth Low Energy specification. The transmitter PA bias can also be
adjusted to provide Bluetooth Class 1 or Class 2 operation.
7.2.2 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 transmitted signal and is much
more stable than direct VCO modulation schemes.
7.2.3 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-syn-
chronization algorithm.
Document No. 002-14797 Rev. *H
Page 40 of 128
CYPRESS [ CYPRESS ]
