Data Sheet
Table Of Contents
- CYBT-343052-02, EZ-BT WICED Module
- General Description
- Benefits
- More Information
- Contents
- Overview
- Pad Connection Interface
- Recommended Host PCB Layout
- Module Connections
- Connections and Optional External Components
- Functional Description
- Integrated Radio Transceiver
- Peripheral and Communication Interfaces
- Keyboard Scanner
- Clock Frequencies
- GPIO Port
- PWM
- Power Management Unit
- Electrical Characteristics
- Chipset RF Specifications
- Timing and AC Characteristics
- Environmental Specifications
- Regulatory Information
- Packaging
- Ordering Information
- Acronyms
- Document Conventions
- Document History Page
- Sales, Solutions, and Legal Information
Document Number: 002-28053 Rev. ** Page 19 of 47
CYBT-343052-02
Integrated Radio Transceiver
The CYBT-343052-02 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. The CYBT-343052-02 is fully compliant with the Bluetooth Radio Specification and enhanced data rate (EDR)
specification and meets or exceeds the requirements to provide the highest communication link quality of service.
Transmitter Path
The CYBT-343052-02 features a fully integrated transmitter. The baseband transmit data is GFSK modulated in the 2.4 GHz ISM band.
Digital Modulator
The digital modulator performs the data modulation and filtering required for the GFSK signal. The fully digital modulator minimizes
any frequency drift or anomalies in the modulation characteristics of the transmitted signal.
Power Amplifier
The CYW20735B1 has an integrated power amplifier (PA) that can transmit up to +10 dBm for class 1 operations.
Receiver Path
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 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 CYBT-343052-02 to be used in
most applications with minimal off-chip filtering.
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.
Receiver Signal Strength Indicator
The radio portion of the CYBT-343052-02 provides a receiver signal strength indicator (RSSI) to the baseband. This enables the
controller to take part in a Bluetooth power-controlled link by providing a metric of its own receiver signal strength to determine whether
the transmitter should increase or decrease its output power.
Local Oscillator Generation
The local oscillator (LO) provides fast frequency hopping (1600 hops/second) across the 79 maximum available channels. The LO
generation sub-block employs an architecture for high immunity to LO pulling during PA operation. The CYBT-343052-02 uses an
internal loop filter.
Calibration
The CYBT-343052-02 radio transceiver features an automated calibration scheme that is fully self-contained in the radio. No user
interaction is required during normal operation or during manufacturing to provide optimal performance. Calibration tunes the perfor-
mance of all the major blocks within the radio to within 2% of optimal conditions, including gain and phase characteristics of filters,
matching between key components, and key gain blocks. This takes into account process variation and temperature variation.
Calibration occurs transparently during normal operation during the settling time of the hops, and calibrates for temperature variations
as the device cools and heats during normal operation in its environment.