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PRELIMINARY
CYWUSB6941
WirelessUSBTM EX Radio
1.0 Features 2.0 Applications
The Cypress CYWUSB6941 WirelessUSBTM 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. * 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
The CYWUSB6941 is targeted for the following Human Input Device (HID) applications: * Mice * Keyboards * Joysticks/Gamepads.
Block Diagram
FM D em odulator
LN A
RFIN
BRXD
Frequency Offset C or rection I
4.8 GHz
F/2 Q
BMISO
Serial Interface
BMOSI BDCLK BnDEN
2.4GHz PLL
Transm itter U p-C onver t 13M Hz XTL OSC Bias & Pwr C ntr l TX Data In
PA
RFOUT
PA Power C on tr ol
PA CTL
Cypress Semiconductor Corporation Document #: 38-16004 Rev. *A
BPAEN BR XEN BTXEN BSEN BXTLEN BnPWR
Figure 2-1. CYWUSB6941 Block Diagram
X13OUT
X13
X13IN
BRCLK
BTXD
*
3901 North First Street
*
San Jose, CA 95134 * 408-943-2600 Revised June 10, 2003
PRELIMINARY
TABLE OF CONTENTS
CYWUSB6941
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
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PRELIMINARY
3.0 Functional Overview
CYWUSB6941
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.
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PRELIMINARY
3.3
3.3.1
CYWUSB6941
Application Examples
Application Example with the CYWUSB6942
Figure 3-1 shows an application example with external components.[1]
V CC1 V CC2 V CC3 V CC4
0.1F
0.1F
0.1F
0.1F
X13IN XTA L X13
V CC1 V CC2 V CC3 V CC4 RFIN
68pF
1.5pF
CYWUSB 6942
CYWUSB6941
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.
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PRELIMINARY
4.0
Ball RF Pins E1 F5 D7 E7 B7 A5 A6 D5 RFIN RFOUT X13 X13IN X13OUT BTXD BRXD PACTL Input Output Input Input Output Input Output Output N/A N/A N/A N/A Antenna Input. Modulated RF signal received. Antenna Output. Modulated RF signal to be transmitted.
CYWUSB6941
Pin Description
Name Type Default Description
Table 4-1. Pin Description Table for the CYWUSB6941
Filter/Crystal/Power Control Pins Crystal Differential Input. Input for a differential crystal oscillator. Crystal Differential Input. Input for a differential crystal oscillator. System Clock. Buffered 13-MHz system clock. Transmit Data. Transmit data input port. Receive Data. Demodulated and sliced digital receive data. Power Amplifier Control. High is an enable for external power amplifier in the transmit mode. Transmit Clock. 1-MHz clock associated with the transmit data. Power Amplifier Enable. Enables the PA in transmit mode. Active HIGH. Receive Circuitry Enable. This signal enables the receive circuitry. Active HIGH. Transmit Circuitry Enable. This signal enables the transmit circuitry. Active HIGH. Synthesizer Enable. This signal enables the hop synthesizer. Active HIGH. Power-on Reset. This signal is active LOW. Connects to CYWUSB6942 signal BnPWR Crystal Oscillator Enable. This signal enables the crystal oscillator. Active HIGH. Input Data. This is the serial data input pin. Output Data. This is the serial data output pin. Input Clock. This is the serial input clock. Enable. This signal enables the serial communication. H VCC pins for RF and analog baseband signals.
Radio Control Interface (Data Pins)
Radio Control Interface (Control Pins) B5 C5 C6 B6 C4 A2 D6 A3 B3 A4 B4 B2 D1 F6 E6 A1 A7 C2 C3 C7 D2 D3 D4 E2 E3 E4 E5 F1 BRCLK BPAEN BRXEN BTXEN BSEN BnPWR BXTLEN BMOSI BMISO BDCLK BnDEN VCC1 VCC2 VCC3 VCC4 GND VCC GND H L VCC pin for digital signals. Ground pins. Output Input Input Input Input Input Input Input Output Input Input VCC
Serial Interface Pins
Power and Ground Pins
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PRELIMINARY
Table 4-1. Pin Description Table for the CYWUSB6941 (continued) Ball F2 F3 F4 F7 B1 C1 Reserved Reserved Reserved GND GND GND N/A N/A N/A Reserved pin. Must be tied to GND. Reserved pin. Must be tied to GND. Reserved pin. Must be tied to GND. Name GND Type Default GND L Ground pins. Description
CYWUSB6941
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
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PRELIMINARY
5.0 Radio Control Interface
CYWUSB6941
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
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PRELIMINARY
6.0 Absolute Maximum Ratings
CYWUSB6941
Storage Temperature ............................................................. ..............................................................................-65C to +150C Ambient Temperature with Power Applied ............................. ....................................................................................0C to +70C 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) .................................. ....................................................................................0C to +70C Ground Voltage ...................................................................... .................................................................................................... 0V FOSC (Oscillator or Crystal Frequency) .................................. ............................................................................ 13 MHz 20 ppm
8.0
DC Characteristics (Over the Operating Range)
Description Output High Voltage Output Low Voltage Input High Voltage Input Low Voltage Input Leakage Current Pin Input Capacitance (except X13, X13IN, and RFIN) Current consumption during sleep mode Current consumption when crystal oscillator is enabled and stable Current consumption when hop frequency synthesizer is enabled and stable BXTLEN = 0 BnPWR = 1 BXTLEN =1 BXTLEN = 1 BSEN =1 1 4 30 62 0 < VIN < VCC Conditions At IOH = -2.0 mA At IOL = 2.0 mA 2.0 -0.3 -1 Min. 2.4 0.4 VCC 0.8 +1 8 10 6 40 85 Typ. Max. Unit V V V V A pF A mA mA mA
Table 8-1. DC Parameters Parameter VOH VOL VIH VIL IIL CIN ISleep ICC (BXTLEN) ICC (BSEN) ICC (BRXEN)
Current consumption when receiver circuitry is BXTLEN = 1 enabled and stable BSEN = 1 BRXEN=1 Current consumption when transmit circuitry is BXTLEN = 1 enabled and stable BSEN = 1 BTXEN =1 Current consumption when transmit circuitry and BXTLEN = 1 PA are enabled and stable BSEN = 1 BTXEN = 1 BPAEN = 1
ICC (BTXEN)
45
70
mA
ICC (BPAEN)
70
85
mA
Note: 2. Rating measured using the Human Body Model (HBM).
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PRELIMINARY
9.0 Radio Specification
Description RF Frequency Range Radio Receiver (T = 25C, VCC = 3.3V)[3] Sensitivity Maximum Received Signal Interference Performance Adjacent (1 MHz) channel selectivity C/I 1 MHz Adjacent (2 MHz) channel selectivity C/I 2 MHz Adjacent (> 3 MHz) channel selectivity C/I > 3 MHz Image Frequency Interference, C/I Image (+4 MHz) BER < 10-3 BER < 10-3 BER < 10-3 -38 Conditions Min. Table 9-1. Radio Parameters Parameter
CYWUSB6941
Typ.
Max. 2.480
Unit GHz dBm dBm dB dB dB dB dB dB
2.402 -82 -33 11 3 -25 -35 -20 -30
-74
Co-channel Interference rejection Carrier-to-Interference (C/I) C = -60 dBm C = -60 dBm C = -60 dBm C = -67 dBm C = -67 dBm
Adjacent (1 MHz) interference to in-band image frequency, C/I C = -67 dBm image 1 MHz (+3 MHz and +5 MHz) Out-of-Band Blocking Interference Signal Frequency 30 MHz - 2399 MHz[4] 2498 MHz - 12.75 GHz Intermodulation Spurious Emission 30 MHz - 1 GHz 1 GHz - 12.75 GHz Radio Transmitter (T = 25C, VCC = 3.3V, PA5) Maximum RF Transmit Power RF Power Control Range RF Power Range Control Step Size Frequency Deviation Zero Crossing Error Occupied Bandwidth Initial Frequency Offset In-band Spurious Second Channel Power (2 MHz) > Third Channel Power (>3 MHz) 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.
BER < 10-3 C = -67 dBm C = -67 dBm C = -64 dBm f = 5,10 MHz -30 -20 -39 dBm dBm dBm
-57 -47 Pwr setting = PA5 PA0-PA5 6 steps, monotonic. -11 -6 23 4.6 90175
dBm dBm dBm dB dB kHz ns
125
10-kHz resolution bandwidth, -20 dBc 100 -20 -40 -57 -30
500
kHz kHz dBm dBm dBm dBm
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PRELIMINARY
10.0
Name tR/F tBPWR tBRCLK tBTXDSU tBTXDHLD tBRXDPD tBXTLEN tBSEN tBRXEN tBPAOFF tBTXEN tBDCLK tHLD tSU
CYWUSB6941
AC Characteristics (over the operating range)
Description Rise and Fall Times on output pins (see AC test loads section 11.0) Pulse width for BnPWR for initiating a reset BRCLK period (duty cycle = 40/60) Set-up time, data stable (on BTXD) before positive edge on BRCLK Hold time, data stable (on BTXD) after positive edge on BRCLK Propagation delay of data from RFIN to serial data at BRXD Time from BXTLEN being driven HIGH to crystal oscillator becoming stable Time from BSEN asserted to hop frequency synthesizer stable Time from BRXEN asserted to receiver circuitry stable for data reception Time from last bit transmitted from the baseband to PA off Time from BTXEN to BPAEN BDCLK period Duty cycle of BDCLK Hold time, data stable after positive edge on BDCLK Set-up time, data stable before positive edge on BDCLK 35 4 4 154 40 20 20 60 250 0 3 10 250 100 1 Min. Typ. Max. Unit 3 20 ns ns s ns ns s ms s s s s ns % ns ns
Table 10-1. AC Timing Parameters
Serial Interface Timing Parameters
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PRELIMINARY
10.1 Transmit and Receive Timing Diagram
CYWUSB6941
BXTLEN tB X TLE N BSEN
TX M ODE
tB S E N BTXEN BRCLK t B TX E N BPA EN tB P A OFF
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 s m inim um
Figure 10-1. Transmit and Receive Timing Diagram
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PRELIMINARY
11.0 AC/DC Test Loads and Waveforms for Digital Pins
OUTPUT 30 pF INCLUDING JIG AND SCOPE 5 pF INCLUDING JIG AND SCOPE
CYWUSB6941
AC Test Loads
OUTPUT
Max
Typical
DC Test Load
VCC OUTPUT R2 R1
Equivalent to:
THEVENIN EQUIVALENT RTH VTH OUTPUT
ALL INPUT PULSES VCC GND Rise time: 1 V/ns 90% 10% 90% 10% Fall time: 1 V/ns
Parameter R1 R2 RTH VTH VCC
1071 937 500 1.4 3.00
Unit V V
12.0
Ordering Information[5]
Part Number Package Name 42FBGA Package Type 42-ball Fine Ball Grid Array (7 x 5 x 1.2 mm) Operating Range Commercial
Table 12-1. Ordering Information CYWUSB6941-42BAC
Note: 5. Companion part CYWUSB6942 is required for proper operation.
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PRELIMINARY
13.0 Package Description
CYWUSB6941
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 WirelessUSBTM EX is a trademark of Cypress Semiconductor. All product and company names mentioned in this document are the trademarks of their respective holders.
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(c) 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
Document History Page
Document Title:CYWUSB6941 WirelessUSBTM EX Radio Document Number: 38-16004 REV. ** *A ECN NO. 122944 125914 Issue Date 02/26/03 06/16/03 Orig. of Change LXA KKU New Data Sheet Updates to tables, timing and signals. Description of Change
CYWUSB6941
Document #: 38-16004 Rev. *A
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