BCM88335 Data Sheet
Bluetooth Radio
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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” on page 36)
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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
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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.
Bluetooth Radio
The BCM88335 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.
Transmitter
The BCM88335 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 transmitter PA bias can also be
adjusted to provide Bluetooth Class 1 or Class 2 operation.
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.
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.
Broadcom®
September 23, 2015 • 88335-DS100-R
Page 32
BROADCOM CONFIDENTIAL
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