Details, datasheet, quote on part number: CYWUSB6932-28SEC
CategoryCommunication => Wireless
DescriptionWirelessusb LS 2.4-GHz DSSS Radio SoC<<<>>><<<>>>Features<<<>>><<<>>>2.4-GHz Radio Transceiver <<<>>>Operates in The Unlicensed Industrial, Scientific, And Medical (ISM) Band (2.4-GHz 2.483GHz) <<<>>> 90-dBm Receive Sensitivity <<<>>>Up to 0-dBm Output Power <<<>>>Range of up to 10 Meters or More <<<>>>Data Throughput of up to 62.5kbits/sec <<<>>>Highly Integrated Low Cost, Minimal Number of External Components Required <<<>>>Dual DSSS Reconfigurable Baseband Correlators <<<>>>SPI Microcontroller Interface (up to 2-MHz Data Rate) <<<>>>13 MHZ 50-ppm Input Clock Operation <<<>>>Low Standby Current ~ 1 A <<<>>>Integrated 32-bit Manufacturing id <<<>>>Operating Voltage From 2.7V to 3.6V <<<>>>Operating Temperature From 0 to 70 C <<<>>>Offered in a Small Footprint 48 Quad Flat Pack no Leads (QFN) or Cost Saving 28-lead Exposed Paddle Soic <<<>>>Functional Description<<<>>><<<>>>the CYWUSB6932/CYWUSB6934 Integrated Circuits (ICs) Are Highly Integrated 2.4-GHz Direct Sequence Spread Spectrum (DSSS) Radio System-on-chip (SoC) Ics. From The Serial Peripheral Interface (SPI) to The Antenna, These Ics Are Single-chip 2.4-GHz DSSS Gaussian Frequency Shift Keying (GFSK) Baseband Modems That Connect Directly to a Usb Controller or a Standard Microcontroller.
CompanyCypress Semiconductor Corp.
DatasheetDownload CYWUSB6932-28SEC datasheet
Cross ref.Similar parts: 7bt08-8785
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Packages28 SOIC


Features, Applications

The CYWUSB6932/CYWUSB6934 Integrated Circuits (ICs) are highly integrated 2.4-GHz Direct Sequence Spread Spectrum (DSSS) Radio System-on-Chip (SoC) ICs. From the Serial Peripheral Interface (SPI) to the antenna, these ICs are single-chip 2.4-GHz DSSS Gaussian Frequency Shift Keying (GFSK) baseband modems that connect directly to a USB controller or a standard microcontroller as shown in Figure 3-1. The is a transmit-only IC and is available in a cost saving 28-pin SOIC package. The is a transceiver IC and is offered in both a 28-pin SOIC package and a small footprint 48-pin QFN package. PC Human Interface Devices (HID) Mice Keyboards Joysticks Peripheral Gaming Devices Game Controllers Console Keyboards General Presenter Tools Remote Controls Consumer Electronics Barcode Scanners POS Peripherals Toys


2.4-GHz radio transceiver Operates in the unlicensed Industrial, Scientific, and Medical (ISM) band (2.4-GHz2.483GHz) -90dBm receive sensitivity to 0dBm output power Range to 10 meters or more Data throughput to 62.5kbits/sec Highly integrated low cost, minimal number of external components required Dual DSSS reconfigurable baseband correlators SPI microcontroller interface (up to 2-MHz data rate) 13 MHz 50-ppm input clock operation Low standby current ~ 1 A Integrated 32 bit Manufacturing ID Operating voltage from to 3.6V Operating temperature from to 70C Offered in a small footprint 48 Quad Flat Pack No Leads (QFN) or cost saving 28-lead exposed paddle SOIC

The CYWUSB6932/CYWUSB6934 ICs are supported by the CY3632 WirelessUSB Development Kit. The development kit provides all of the materials and documents needed to cut the cord on wired applications including two radio modules that connect directly to two prototyping platform boards, comprehensive WirelessUSB protocol code examples a WirelessUSB Listener tool and all of the associated schematics, gerber files and bill of materials. The CY4632 WirelessUSB LS Keyboard Mouse Reference Design provides a production-worthy example of a wireless mouse and keyboard system. The CY3633 WirelessUSB LS Gaming Development Kit provides support for designing a wireless gamepad for the major gaming consoles and is offered as an accessory to the CY3632 WirelessUSB.

The CYWUSB6932/CYWUSB6934 ICs provide a complete WirelessUSB LS SPI to antenna radio modem. The SoC is designed to implement wireless devices operating in the worldwide 2.4-GHz Industrial, Scientific, and Medical (ISM) frequency band It is intended for systems compliant with world-wide regulations covered by ETSI 489-1 V1.4.1, ETSI 328-1 V1.3.1 (European Countries); FCC CFR 47 Part 15 (USA and Industry Canada) and ARIB STD-T66 (Japan). The CYWUSB6934 IC contains a 2.4-GHz radio transceiver, a GFSK modem and a dual DSSS reconfigurable baseband. The CYWUSB6932 IC contains a 2.4-GHz radio transmit-only, a GFSK modem and a DSSS baseband. The radio and baseband are both code- and frequency-agile. Forty-nine spreading codes selected for optimal performance (Gold codes) are supported across 78 1-MHz channels yielding a theoretical spectral capacity of 3822 channels. Both ICs support a range to 10 meters or more.

The receiver and transmitter are a single-conversion low-Intermediate Frequency (low-IF) architecture with fully integrated IF channel matched filters to achieve high performance in the presence of interference. An integrated Power Amplifier (PA) provides an output power control range dB in seven steps. Both the receiver and transmitter integrated Voltage Controlled Oscillator (VCO) and synthesizer have the agility to cover the complete 2.4-GHz GFSK radio transmitter ISM band. The VCO loop filter is also integrated on-chip.

The transmitter uses a DSP-based vector modulator to convert the 1-MHz chips to an accurate GFSK carrier. The receiver uses a fully integrated Frequency Modulator (FM) detector with automatic data slicer to demodulate the GFSK signal.

Data is converted to DSSS chips by a digital spreader. De-spreading is performed by an oversampled correlator. The DSSS baseband cancels spurious noise and assembles properly correlated data bytes. The DSSS baseband has four operating modes: 64 chips/bit Single Channel, 32 chips/bit Dual Channel, 32 chips/bit Single Channel 2x Oversampled, and 32 chips/bit Single Channel Dual Data Rate (DDR). 4.3.1 64 chips/bit Single Channel

The baseband supports a single data stream operating at 15.625 kbits/sec. The advantage of selecting this mode is its ability to tolerate a noisy environment. This is because the 15.625 kbits/sec data stream utilizes the longest PN Code resulting in the highest probability for recovering packets over the air. This mode can also be selected for systems requiring data transmissions over longer ranges. 4.3.2 32 chips/bit Dual Channel

The baseband supports two non-simultaneous data streams each operating at 31.25 kbits/sec. 4.3.3 32 chips/bit Single Channel 2x Oversampled

The baseband supports a single data stream operating at 31.25 kbits/sec that is sampled twice as much as the other modes. The advantage of selecting this mode is its ability to tolerate a noisy environment. 4.3.4 32 chips/bit Single Channel Dual Data Rate (DDR)

The baseband spreads bits in pairs and supports a single data stream operating at 62.5 kbits/sec.

Both ICs provide a data Serializer/Deserializer (SERDES), which provides byte-level framing of transmit and receive data. Bytes for transmission are loaded into the SERDES and receive bytes are read from the SERDES via the SPI interface. The SERDES provides double buffering of transmit and receive data. While one byte is being transmitted by the radio the next byte can be written to the SERDES data register insuring there are no breaks in transmitted data. After a receive byte has been received it is loaded into the SERDES data register and can be read at any time until the next byte is received, at which time the old contents of the SERDES data register will be overwritten.

Both ICs have a fully synchronous SPI slave interface for connectivity to the application MCU. Configuration and byte-oriented data transfer can be performed over this interface. An interrupt is provided to trigger real time events. An optional SERDES Bypass mode (DIO) is provided for applications that require a synchronous serial bit-oriented data path. This interface is for data only.

A 13 MHz crystal (50ppm or better) is directly connected to X13IN and X13 without the need for external capacitors. Both ICs have a programmable trim capability for adjusting the on-chip load capacitance supplied to the crystal. The Radio Frequency (RF) circuitry has on-chip decoupling capacitors. Both devices are powered from 3.6V DC supply. Both devices can be shutdown to a fully static state using the PD pin. Below are the requirements for the crystal to be directly connected to X13IN and X13: Nominal Frequency: 13 MHz Operating Mode: Fundamental Mode Resonance Mode: Parallel Resonant Frequency Stability: 50 ppm Series Resistance: 100 ohms Load Capacitance: 10 pF Drive Level: 10uW100 uW

The RSSI register (Reg 0x22) returns the relative signal strength of the ON-channel signal power and can be used to: 1) determine the connection quality, 2) determine the value of the noise floor, and 3) check for a quiet channel before transmitting. The internal RSSI voltage is sampled through a 5-bit analog-to-digital converter (ADC). A state machine controls the conversion process. Under normal conditions, the RSSI state machine initiates a conversion when an ON-channel carrier is detected and remains above the noise floor for over 50uS. The conversion produces a 5-bit value in the RSSI register (Reg 0x22, bits 4:0) along with a valid bit, RSSI register (Reg 0x22, bit 5). The state machine then remains in HALT mode and does not reset for a new conversion until the receive mode is toggled off and on. Once a connection has been established, the RSSI register can be read to determine the relative connection quality of the channel. A RSSI register value lower than 10 indicates that the received signal strength is low, a value greater than 28 indicates a strong signal level. To check for a quiet channel before transmitting, first set up receive mode properly and read the RSSI register (Reg 0x22). If the valid bit is zero, then force the Carrier Detect register (Reg 0x2F, bit 7=1) to initiate an ADC conversion. Then, wait greater than 50uS and read the RSSI register again. Next, clear the Carrier Detect Register (Reg 0x2F, bit 7=0) and turn the receiver OFF. Measuring the noise floor of a quiet channel is inherently a 'noisy' process so, for best results, this procedure should be repeated several times (~20) to compute an average noise floor level. A RSSI register value of 0-10 indicates a channel that is relatively quiet. A RSSI register value greater than 10 indicates the channel is probably being used. A RSSI register value greater than 28 indicates the presence of a strong signal.


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