CYWUSB6941 PRELIMINARY WirelessUSB™ EX Radio 1.0 Features 2.0 The Cypress CYWUSB6941 WirelessUSB™ EX radio transceiver is designed to work with the Cypress CYWUSB6942 WirelessUSB EX baseband controller to provide a complete WirelessUSB EX solution. The CYWUSB6941 contains a 2.4-GHz radio transceiver, a GFSK modem, and a radio control interface that communicates with the CYWUSB6942. Applications The CYWUSB6941 is targeted for the following Human Input Device (HID) applications: • Mice • Keyboards • Joysticks/Gamepads. • Typically requires only eight external components for ease of implementation and manufacturing • -6-dBm (typical) transmit power for a transmission range of up to 10 meters • -82-dBm (typical) receive sensitivity • Provides low-power operating modes to conserve battery life • 2.7V to 3.6V operation • 7 x 5 x 1.2 mm 42-pin FBGA package Block Diagram FM D em odulator LN A Frequency Offset C or rection BRXD 4.8 GHz I Serial Interface BDCLK F/2 Q BMISO BMOSI RFIN 2.4GHz PLL BnDEN Transm itter U p-C onver t PA RFOUT 13M Hz XTL OSC TX Data In Bias & Pwr C ntr l PA Power C on tr ol PA CTL BTXD BRCLK X13IN X13 X13OUT BPAEN BR XEN BTXEN BSEN BXTLEN BnPWR Figure 2-1. CYWUSB6941 Block Diagram Cypress Semiconductor Corporation Document #: 38-16004 Rev. *A • 3901 North First Street • San Jose, CA 95134 • 408-943-2600 Revised June 10, 2003 PRELIMINARY CYWUSB6941 TABLE OF CONTENTS 1.0 FEATURES ...................................................................................................................................... 1 2.0 APPLICATIONS ............................................................................................................................... 1 3.0 FUNCTIONAL OVERVIEW .............................................................................................................. 3 3.1 2.4-GHz Radio Transceiver and GFSK Modem .......................................................................... 3 3.2 Clocking ...................................................................................................................................... 3 3.3 Application Examples .................................................................................................................. 4 4.0 PIN DESCRIPTION .......................................................................................................................... 5 5.0 RADIO CONTROL INTERFACE ...................................................................................................... 8 5.1 Radio/Baseband Interface Connections ..................................................................................... 8 6.0 ABSOLUTE MAXIMUM RATINGS .................................................................................................. 9 7.0 OPERATING CONDITIONS ............................................................................................................. 9 8.0 DC CHARACTERISTICS ................................................................................................................. 9 9.0 RADIO SPECIFICATION ............................................................................................................... 10 10.0 AC CHARACTERISTICS .............................................................................................................. 11 10.1 Transmit and Receive Timing Diagrams ............................................................................... 12 11.0 AC Test Loads and Waveforms for Digital Pins ....................................................................... 13 12.0 ORDERING INFORMATION ........................................................................................................ 14 13.0 PACKAGE DESCRIPTION .......................................................................................................... 14 LIST OF FIGURES Figure 2-1. CYWUSB6941 Block Diagram .............................................................................................. 1 Figure 3-1. CYWUSB6941 Application Example with External Components .......................................... 4 Figure 4-1. CYWUSB6941 42-Ball FBGA Top View................................................................................ 7 Figure 5-1. CYWUSB6941 Radio/Baseband Interface Diagram ............................................................. 8 Figure 10-1. Transmit and Receive Timing Diagram ............................................................................. 12 Figure 12-1. CYWUSB6941 Package Diagram ..................................................................................... 14 LIST OF TABLES Table 4-1. Pin Description Table for the CYWUSB6941 ........................................................................ 5 Table 8-1. DC Parameters ...................................................................................................................... 8 Table 9-1. Radio Parameters .................................................................................................................. 9 Table 10-1. AC Timing Parameters ...................................................................................................... 10 Table 11-1. Ordering Information .......................................................................................................... 12 Document #: 38-16004 Rev. *A Page 2 of 14 PRELIMINARY 3.0 CYWUSB6941 Functional Overview The Cypress CYWUSB6941 WirelessUSB EX transceiver is designed to work with the Cypress CYWUSB6942 WirelessUSB EX baseband controller to provide a complete WirelessUSB EX solution. The CYWUSB6941 contains a 2.4-GHz radio transceiver, a GFSK modem, and a radio control interface that communicates with the CYWUSB6942 WirelessUSB EX baseband. The CYWUSB6941 also facilitates the development of a complete WirelessUSB EX system with a minimum number of additional components, typically requiring only eight external components (including crystal) for ease of implementation and manufacturing (refer to Figure 3-1). Specific features include: • 2.4-GHz frequency-hopping spread spectrum (FHSS) transceiver • GFSK modulator/demodulator • No external transmit/receive switch required • Minimizes the need for external components • Closed-loop phase-locked loop (PLL) • VCO is integrated in the CYWUSB6941 • No external loop circuitry required • Radio control interface. 3.1 2.4-GHz Radio Transceiver and GFSK Modem The receiver is a low-IF architecture with fully integrated IF filters to achieve high performance in the presence of interference. The FM demodulator and fast data slicer are fully integrated. The hop frequency synthesizer provides the frequency-hopping local oscillator for the transmitter and receiver. The only external components required are reference crystal, and several capacitors. The RF VCO is fully integrated, requiring no external tank circuits. The transmitter uses a DSP-based vector modulator to convert the transmit data to an accurate GFSK-modulated carrier. There are a variety of DC power control features for transmitter, synthesizer, and receiver functions to optimize the average current drain. 3.2 Clocking The CYWUSB6941 requires an external 13-MHz crystal with the following characteristics: • Crystal temperature stability: ± 15 ppm max • Crystal load capacitance: 10 – 15 pF. The crystal has to be placed across the X13IN and X13 pins. No extra capacitors are needed. Document #: 38-16004 Rev. *A Page 3 of 14 PRELIMINARY 3.3 Application Examples 3.3.1 Application Example with the CYWUSB6942 CYWUSB6941 Figure 3-1 shows an application example with external components.[1] V CC1 0.1 µF V CC3 V CC2 0.1 µ F 0.1µ F V CC4 0.1µ F X13IN V CC1 V CC2 V CC3 V CC4 XTA L 68pF RFIN 1.5pF X13 CYWUSB6941 CYWUSB 6942 RFOUT 47pF 12 Radio Control Interf ac e BnPWR BnPWR GND Figure 3-1. CYWUSB6941 Application Example with External Components Note: 1. The matching network components between the RFIN, and RFOUT are chosen based on the usage of a four-layer FR4 PCB (part number PCD-9100). See application notes for additional details on board layout requirements. See application notes for RF critical design considerations. Document #: 38-16004 Rev. *A Page 4 of 14 PRELIMINARY 4.0 CYWUSB6941 Pin Description Table 4-1. Pin Description Table for the CYWUSB6941 Ball Name Type Default Description E1 RFIN Input N/A Antenna Input. Modulated RF signal received. F5 RFOUT Output N/A Antenna Output. Modulated RF signal to be transmitted. RF Pins Filter/Crystal/Power Control Pins D7 X13 Input N/A Crystal Differential Input. Input for a differential crystal oscillator. E7 X13IN Input N/A Crystal Differential Input. Input for a differential crystal oscillator. B7 X13OUT Output System Clock. Buffered 13-MHz system clock. Radio Control Interface (Data Pins) A5 BTXD Input A6 BRXD Output Receive Data. Demodulated and sliced digital receive data. Transmit Data. Transmit data input port. D5 PACTL Output Power Amplifier Control. High is an enable for external power amplifier in the transmit mode. Radio Control Interface (Control Pins) B5 BRCLK Output Transmit Clock. 1-MHz clock associated with the transmit data. C5 BPAEN Input Power Amplifier Enable. Enables the PA in transmit mode. Active HIGH. C6 BRXEN Input Receive Circuitry Enable. This signal enables the receive circuitry. Active HIGH. B6 BTXEN Input Transmit Circuitry Enable. This signal enables the transmit circuitry. Active HIGH. C4 BSEN Input Synthesizer Enable. This signal enables the hop synthesizer. Active HIGH. A2 BnPWR Input Power-on Reset. This signal is active LOW. Connects to CYWUSB6942 signal BnPWR D6 BXTLEN Input Crystal Oscillator Enable. This signal enables the crystal oscillator. Active HIGH. Serial Interface Pins A3 BMOSI Input Input Data. This is the serial data input pin. B3 BMISO Output A4 BDCLK Input Output Data. This is the serial data output pin. Input Clock. This is the serial input clock. B4 BnDEN Input Enable. This signal enables the serial communication. Power and Ground Pins B2 VCC1 D1 VCC2 VCC H VCC pins for RF and analog baseband signals. F6 VCC3 E6 VCC4 VCC H VCC pin for digital signals. A1 GND GND L Ground pins. A7 C2 C3 C7 D2 D3 D4 E2 E3 E4 E5 F1 Document #: 38-16004 Rev. *A Page 5 of 14 PRELIMINARY CYWUSB6941 Table 4-1. Pin Description Table for the CYWUSB6941 (continued) Ball Name Type Default F2 GND GND L Description Ground pins. F3 F4 F7 Reserved GND N/A Reserved pin. Must be tied to GND. B1 Reserved GND N/A Reserved pin. Must be tied to GND. C1 Reserved GND N/A Reserved pin. Must be tied to GND. 1 2 3 4 5 6 7 A GND BnPW R BMOSI BDCLK BTXD BRXD GND A B Reserved VCC1 BMISO BnDEN BRCLK BTXEN X13OUT B C Reserved GND GND BSEN BPAEN BRXEN GND C D VCC2 GND GND GND PACTL BXTLEN X13 D E RFIN GND GND GND GND VCC4 X13IN E F GND GND GND GND RFOUT VCC3 Reserved F 1 2 3 4 5 6 7 Figure 4-1. CYWUSB6941 42-Ball FBGA Top View Document #: 38-16004 Rev. *A Page 6 of 14 PRELIMINARY 5.0 CYWUSB6941 Radio Control Interface The CYWUSB6941 radio control interface is the communication interface between the CYWUSB6941 transceiver and the CYWUSB6942 WirelessUSB EX baseband. It consists of a data interface and a control interface for transmitting and receiving data, and a serial interface for a control interface from the WirelessUSB baseband CYWUSB6941. There are two subsections of the interface: • RF data and control path • Radio control interface (serial). Nine signals are used in the RF data and control path, four in the serial radio control interface, and one system clock. All of the signals are unidirectional. Direction is oriented to/from the CYWUSB6941 RF IC. 5.1 Radio / Baseband Interface Connections D ata Interface BTXD BRXD C ontrol Interface BRCLK BTXEN BRXEN BPAEN WirelessU SB B aseband C YWU SB 6942 BSEN BXTLEN BnPW R WirelessU SB R adio IC C YWU SB 6941 Serial Interface BDCLK BnDEN BMOSI BMISO Master C lock BCLK13M Figure 5-1. CYWUSB6941 Radio/Baseband Interface Diagram Document #: 38-16004 Rev. *A Page 7 of 14 PRELIMINARY 6.0 CYWUSB6941 Absolute Maximum Ratings Storage Temperature ............................................................. ..............................................................................–65°C to +150°C Ambient Temperature with Power Applied ............................. ....................................................................................0°C to +70°C Supply Voltage on VCC relative to VSS ............................................ ................................................................................. –0.3V to +3.9V DC Input Voltage.................................................................... ..........................................................................–0.3V to VCC +0.3V DC Voltage applied to Outputs in High-Z State ....................................................................... ..........................................................................–0.3V to VCC +0.3V Static Discharge Voltage (Digital)[2 ...................................................] ......................................................................................... > 2000 V Static Discharge Voltage (RF)[2]......................................................... ............................................................................................ > 500 V Latch-up Current .................................................................... .......................................................................... +200 mA, –200 mA 7.0 Operating Conditions VCC (Supply Voltage) ............................................................. ..................................................................................... 2.7V to 3.6V TA (Ambient Temperature Under Bias) .................................. ....................................................................................0°C to +70°C Ground Voltage ...................................................................... .................................................................................................... 0V FOSC (Oscillator or Crystal Frequency) .................................. ............................................................................ 13 MHz ± 20 ppm 8.0 DC Characteristics (Over the Operating Range) Table 8-1. DC Parameters Parameter Description Conditions Min. 2.4 VOH Output High Voltage At IOH = –2.0 mA VOL Output Low Voltage At IOL = 2.0 mA Typ. Max. Unit V 0.4 V VIH Input High Voltage 2.0 VCC V VIL Input Low Voltage –0.3 0.8 V –1 +1 µA 8 pF IIL Input Leakage Current CIN Pin Input Capacitance (except X13, X13IN, and RFIN) 0 < VIN < VCC ISleep Current consumption during sleep mode BXTLEN = 0 1 10 µA ICC (BXTLEN) Current consumption when crystal oscillator is enabled and stable BnPWR = 1 BXTLEN =1 4 6 mA ICC (BSEN) Current consumption when hop frequency synthesizer is enabled and stable BXTLEN = 1 BSEN =1 30 40 mA ICC (BRXEN) Current consumption when receiver circuitry is BXTLEN = 1 enabled and stable BSEN = 1 BRXEN=1 62 85 mA ICC (BTXEN) Current consumption when transmit circuitry is BXTLEN = 1 enabled and stable BSEN = 1 BTXEN =1 45 70 mA ICC (BPAEN) Current consumption when transmit circuitry and BXTLEN = 1 PA are enabled and stable BSEN = 1 BTXEN = 1 BPAEN = 1 70 85 mA Note: 2. Rating measured using the Human Body Model (HBM). Document #: 38-16004 Rev. *A Page 8 of 14 PRELIMINARY 9.0 CYWUSB6941 Radio Specification Table 9-1. Radio Parameters Parameter Description Conditions RF Frequency Range Min. Typ. 2.402 Max. Unit 2.480 GHz Radio Receiver (T = 25°C, VCC = 3.3V)[3] Sensitivity BER < 10–3 Maximum Received Signal BER < 10–3 Interference Performance BER < 10–3 -82 –38 Co-channel Interference rejection Carrier-to-Interference (C/I) C = –60 dBm –74 dBm –33 dBm 11 dB Adjacent (1 MHz) channel selectivity C/I 1 MHz C = –60 dBm 3 dB Adjacent (2 MHz) channel selectivity C/I 2 MHz C = –60 dBm –25 dB Adjacent (> 3 MHz) channel selectivity C/I > 3 MHz C = –67 dBm –35 dB Image Frequency Interference, C/I Image (+4 MHz) C = –67 dBm –20 dB Adjacent (1 MHz) interference to in-band image frequency, C/I C = –67 dBm image ±1 MHz (+3 MHz and +5 MHz) –30 dB Out-of-Band Blocking Interference Signal Frequency BER < 10–3 30 MHz – 2399 MHz[4] C = –67 dBm –30 dBm 2498 MHz – 12.75 GHz C = –67 dBm –20 dBm Intermodulation C = –64 dBm ∆f = 5,10 MHz –39 dBm Spurious Emission 30 MHz – 1 GHz –57 dBm 1 GHz – 12.75 GHz –47 dBm Radio Transmitter (T = 25°C, VCC = 3.3V, PA5) Maximum RF Transmit Power Pwr setting = PA5 RF Power Control Range RF Power Range Control Step Size -6 dBm PA0-PA5 23 dB 6 steps, monotonic. 4.6 dB Frequency Deviation 90175 kHz Zero Crossing Error ±125 ns Occupied Bandwidth Initial Frequency Offset –11 ±500 10-kHz resolution bandwidth, –20 dBc ±100 kHz kHz In-band Spurious Second Channel Power (±2 MHz) –20 dBm > Third Channel Power (>3 MHz) –40 dBm –57 dBm –30 dBm Non-harmonically Related Spurious 30 MHz – 12.75 GHz Harmonic Spurious 2nd Harmonic through 5th Harmonic Notes: 3. BER PRBS9 sequence 4. Subharmonics of receive frequency excluded. Document #: 38-16004 Rev. *A Page 9 of 14 PRELIMINARY 10.0 CYWUSB6941 AC Characteristics (over the operating range) Table 10-1. AC Timing Parameters Name Description Min. Typ. Max. Unit tR/F Rise and Fall Times on output pins (see AC test loads section 11.0) tBPWR Pulse width for BnPWR for initiating a reset 3 20 tBRCLK BRCLK period (duty cycle = 40/60) tBTXDSU Set-up time, data stable (on BTXD) before positive edge on BRCLK tBTXDHLD Hold time, data stable (on BTXD) after positive edge on BRCLK tBRXDPD Propagation delay of data from RFIN to serial data at BRXD tBXTLEN Time from BXTLEN being driven HIGH to crystal oscillator becoming stable 10 ms tBSEN Time from BSEN asserted to hop frequency synthesizer stable 250 µs tBRXEN Time from BRXEN asserted to receiver circuitry stable for data reception 35 µs tBPAOFF Time from last bit transmitted from the baseband to PA off 4 µs tBTXEN Time from BTXEN to BPAEN 4 µs 100 ns ns µs 1 250 ns 0 ns µs 3 Serial Interface Timing Parameters tBDCLK BDCLK period 154 η Duty cycle of BDCLK 40 tHLD Hold time, data stable after positive edge on BDCLK 20 ns tSU Set-up time, data stable before positive edge on BDCLK 20 ns Document #: 38-16004 Rev. *A ns 60 % Page 10 of 14 PRELIMINARY 10.1 CYWUSB6941 Transmit and Receive Timing Diagram BXTLEN tB X TLE N BSEN TX M ODE tB S E N BTXEN BRCLK tB P A OFF t B TX E N BPA EN BTXD t CA RRIE R RFOUT RX M ODE BRXEN tB RX E N RFIN t B RX DP B BRXD tC AR R IER = 10 µ s m inim um Figure 10-1. Transmit and Receive Timing Diagram Document #: 38-16004 Rev. *A Page 11 of 14 PRELIMINARY 11.0 CYWUSB6941 AC/DC Test Loads and Waveforms for Digital Pins AC Test Loads OUTPUT OUTPUT 5 pF 30 pF INCLUDING JIG AND SCOPE INCLUDING JIG AND SCOPE Max Typical DC Test Load R1 VCC OUTPUT R2 THÉVENIN EQUIVALENT RTH VTH OUTPUT Equivalent to: Parameter R1 R2 RTH VTH VCC 12.0 ALL INPUT PULSES VCC GND Unit Ω Ω Ω V V 1071 937 500 1.4 3.00 90% 10% Rise time: 1 V/ns 90% 10% Fall time: 1 V/ns Ordering Information[5] Table 12-1. Ordering Information Part Number Package Name CYWUSB6941-42BAC 42FBGA Package Type 42-ball Fine Ball Grid Array (7 x 5 x 1.2 mm) Operating Range Commercial Note: 5. Companion part CYWUSB6942 is required for proper operation. Document #: 38-16004 Rev. *A Page 12 of 14 PRELIMINARY 13.0 CYWUSB6941 Package Description The CYWUSB6941 comes in a 42-ball FBGA package with package size of 7 x 5 x 1.2 mm and a ball pitch of 0.75 mm. All dimensions are in millimeters (mm). 42-ball FBGA (7.0 x 5.0 x 1.2 mm) BA42 51-85139-*C Figure 13-1. CYWUSB6941 Package Diagram WirelessUSB™ EX is a trademark of Cypress Semiconductor. All product and company names mentioned in this document are the trademarks of their respective holders. Document #: 38-16004 Rev. *A Page 13 of 14 © Cypress Semiconductor Corporation, 2003. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges. PRELIMINARY CYWUSB6941 Document History Page Document Title:CYWUSB6941 WirelessUSB™ EX Radio Document Number: 38-16004 REV. ECN NO. Issue Date Orig. of Change Description of Change ** 122944 02/26/03 LXA New Data Sheet *A 125914 06/16/03 KKU Updates to tables, timing and signals. Document #: 38-16004 Rev. *A Page 14 of 14