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CYWUSB6941

型号：

CYWUSB6941

描述：

的WirelessUSB无线电EX[ WirelessUSB EX Radio ]

品牌：

CYPRESS[ CYPRESS ]

页数：

14 页

PDF大小：

197 K

下载PDF手册
CYWUSB6941  
PRELIMINARY  
WirelessUSB™ EX Radio  
1.0  
Features  
2.0  
Applications  
The Cypress CYWUSB6941 WirelessUSB™ EX radio trans-  
ceiver 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.  
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  
LNA  
RFIN  
Demodulator  
Frequency  
Offset  
BRXD  
Correction  
4.8 GHz  
I
F/2  
Q
BMISO  
BMOSI  
BDCLK  
BnDEN  
2.4GHz  
PLL  
Transmitter  
Up-Convert  
PA  
RFOUT  
PA CTL  
13MHz  
XTL OSC  
TX  
PA  
Bias  
&
Data In  
Power  
Con trol  
Pwr Cntrl  
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  
CYWUSB6941  
3.0  
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 currentdrain.  
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  
CYWUSB6941  
3.3  
Application Examples  
3.3.1  
Application Example with the CYWUSB6942  
Figure 3-1 shows an application example with external components.[1]  
VCC3  
VCC4  
VCC2  
VCC1  
0.1µF  
0.1µF  
0.1µF  
0.1µF  
VCC1  
X13IN  
X13  
VCC2 VCC3 VCC4  
68pF  
XTAL  
RFIN  
1.5pF  
CYWUSB6941  
CYWUSB6942  
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  
CYWUSB6941  
4.0  
Pin Description  
Table 4-1. Pin Description Table for the CYWUSB6941  
Ball  
RF Pins  
E1  
Name  
Type Default  
Description  
RFIN  
Input N/A Antenna Input. Modulated RF signal received.  
F5  
RFOUT Output N/A Antenna Output. Modulated RF signal to be transmitted.  
Filter/Crystal/Power Control Pins  
D7  
E7  
B7  
X13  
Input  
Input  
N/A Crystal Differential Input. Input for a differential crystal oscillator.  
N/A Crystal Differential Input. Input for a differential crystal oscillator.  
System Clock. Buffered 13-MHz system clock.  
X13IN  
X13OUT Output  
Radio Control Interface (Data Pins)  
A5  
A6  
D5  
BTXD  
BRXD  
Input  
Transmit Data. Transmit data input port.  
Output  
Receive Data. Demodulated and sliced digital receive data.  
PACTL Output  
Power Amplifier Control. High is an enable for external power amplifier in the transmit  
mode.  
Radio Control Interface (Control Pins)  
B5  
C5  
C6  
B6  
C4  
A2  
D6  
BRCLK Output  
Transmit Clock. 1-MHz clock associated with the transmit data.  
BPAEN  
BRXEN  
BTXEN  
BSEN  
Input  
Input  
Input  
Input  
Input  
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.  
BnPWR  
BXTLEN Input  
Serial Interface Pins  
A3  
B3  
A4  
B4  
BMOSI  
Input  
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.  
BMISO Output  
BDCLK  
BnDEN  
Input  
Input  
Enable. This signal enables the serial communication.  
Power and Ground Pins  
B2  
D1  
F6  
E6  
A1  
A7  
C2  
C3  
C7  
D2  
D3  
D4  
E2  
E3  
E4  
E5  
F1  
VCC1  
VCC2  
VCC3  
VCC4  
GND  
VCC  
H
VCC pins for RF and analog baseband signals.  
VCC  
H
L
VCC pin for digital signals.  
Ground pins.  
GND  
Document #: 38-16004 Rev. *A  
Page 5 of 14  
PRELIMINARY  
CYWUSB6941  
Table 4-1. Pin Description Table for the CYWUSB6941 (continued)  
Ball  
F2  
Name  
Type Default  
GND Ground pins.  
Description  
GND  
L
F3  
F4  
F7  
Reserved GND  
Reserved GND  
Reserved GND  
N/A Reserved pin. Must be tied to GND.  
N/A Reserved pin. Must be tied to GND.  
N/A Reserved pin. Must be tied to GND.  
B1  
C1  
1
2
BnPWR  
VCC1  
GND  
GND  
GND  
GND  
2
3
4
5
6
7
A
B
C
D
E
F
GND  
Reserved  
Reserved  
VCC2  
RFIN  
BMOSI  
BMISO  
GND  
GND  
GND  
GND  
3
BDCLK  
BnDEN  
BSEN  
GND  
GND  
GND  
4
BTXD  
BRCLK  
BPAEN  
PACTL  
GND  
BRXD  
BTXEN  
BRXEN  
BXTLEN  
VCC4  
VCC3  
6
GND  
X13OUT  
GND  
A
B
C
D
E
F
X13  
X13IN  
Reserved  
7
GND  
RFOUT  
1
5
Figure 4-1. CYWUSB6941 42-Ball FBGA Top View  
Document #: 38-16004 Rev. *A  
Page 6 of 14  
PRELIMINARY  
CYWUSB6941  
5.0  
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  
Data Interface  
BTXD  
BRXD  
Control Interface  
BRCLK  
BTXEN  
BRXEN  
BPAEN  
WirelessUSB  
Baseband  
CYWUSB6942  
WirelessUSB  
Radio IC  
CYWUSB6941  
BSEN  
BXTLEN  
BnPW R  
Serial Interface  
BDCLK  
BnDEN  
BMOSI  
BMISO  
Master Clock  
BCLK13M  
Figure 5-1. CYWUSB6941 Radio/Baseband Interface Diagram  
Document #: 38-16004 Rev. *A  
Page 7 of 14  
PRELIMINARY  
CYWUSB6941  
6.0  
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  
At IOH = –2.0 mA  
At IOL = 2.0 mA  
Min.  
Typ.  
Max.  
Unit  
V
VOH  
VOL  
VIH  
VIL  
Output High Voltage  
Output Low Voltage  
2.4  
0.4  
VCC  
0.8  
+1  
V
Input High Voltage  
Input Low Voltage  
Input Leakage Current  
2.0  
–0.3  
–1  
V
V
IIL  
0 < VIN < VCC  
BXTLEN = 0  
µA  
pF  
CIN  
Pin Input Capacitance (except X13, X13IN, and  
RFIN)  
8
ISleep  
Current consumption during sleep mode  
1
4
10  
6
µA  
ICC (BXTLEN)  
Current consumption when crystal oscillator is BnPWR = 1  
mA  
enabled and stable  
BXTLEN =1  
ICC (BSEN)  
Current consumption when hop frequency  
synthesizer is enabled and stable  
BXTLEN = 1  
BSEN =1  
30  
62  
40  
85  
mA  
mA  
ICC (BRXEN)  
Current consumption when receiver circuitry is BXTLEN = 1  
enabled and stable  
BSEN = 1  
BRXEN=1  
ICC (BTXEN)  
Current consumption when transmit circuitry is BXTLEN = 1  
45  
70  
70  
85  
mA  
mA  
enabled and stable  
BSEN = 1  
BTXEN =1  
ICC (BPAEN)  
Current consumption when transmit circuitry and BXTLEN = 1  
PA are enabled and stable  
BSEN = 1  
BTXEN = 1  
BPAEN = 1  
Note:  
2. Rating measured using the Human Body Model (HBM).  
Document #: 38-16004 Rev. *A  
Page 8 of 14  
PRELIMINARY  
CYWUSB6941  
9.0  
Radio Specification  
Table 9-1. Radio Parameters  
Parameter  
Description  
Conditions  
Min. Typ. Max. Unit  
RF Frequency Range  
2.402  
2.480 GHz  
Radio Receiver (T = 25°C, VCC = 3.3V)[3]  
Sensitivity  
BER < 10–3  
-82  
–74  
dBm  
dBm  
Maximum Received Signal  
Interference Performance  
BER < 10–3  
BER < 10–3  
–38  
–33  
Co-channel Interference rejection Carrier-to-Interference (C/I) C = –60 dBm  
11  
3
dB  
dB  
dB  
dB  
dB  
dB  
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)  
C = –60 dBm  
C = –60 dBm  
C = –67 dBm  
C = –67 dBm  
–25  
–35  
–20  
–30  
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  
BER < 10–3  
Interference Signal Frequency  
30 MHz – 2399 MHz[4]  
2498 MHz – 12.75 GHz  
Intermodulation  
C = –67 dBm  
C = –67 dBm  
–30  
–20  
–39  
dBm  
dBm  
dBm  
C = –64 dBm  
∆f = 5,10 MHz  
Spurious Emission  
30 MHz – 1 GHz  
–57  
–47  
dBm  
dBm  
1 GHz – 12.75 GHz  
Radio Transmitter (T = 25°C, VCC = 3.3V, PA5)  
Maximum RF Transmit Power  
RF Power Control Range  
Pwr setting = PA5  
PA0-PA5  
–11  
-6  
23  
4.6  
dBm  
dB  
RF Power Range Control Step Size  
Frequency Deviation  
6 steps, monotonic.  
dB  
90-  
kHz  
175  
Zero Crossing Error  
Occupied Bandwidth  
±125  
ns  
10-kHz resolution  
bandwidth, –20 dBc  
±500 kHz  
Initial Frequency Offset  
±100  
kHz  
In-band Spurious  
Second Channel Power (±2 MHz)  
> Third Channel Power (>3 MHz)  
Non-harmonically Related Spurious  
30 MHz – 12.75 GHz  
–20  
–40  
dBm  
dBm  
–57  
–30  
dBm  
dBm  
Harmonic Spurious  
2
nd 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  
CYWUSB6941  
10.0  
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)  
Pulse width for BnPWR for initiating a reset  
3
20  
ns  
ns  
µs  
ns  
ns  
µs  
ms  
µs  
µs  
µs  
µs  
tBPWR  
tBRCLK  
tBTXDSU  
100  
BRCLK period (duty cycle = 40/60)  
1
Set-up time, data stable (on BTXD) before positive edge on BRCLK  
250  
0
tBTXDHLD Hold time, data stable (on BTXD) after positive edge on BRCLK  
tBRXDPD Propagation delay of data from RFIN to serial data at BRXD  
3
tBXTLEN  
tBSEN  
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  
10  
250  
tBRXEN  
tBPAOFF  
tBTXEN  
35  
4
4
Serial Interface Timing Parameters  
tBDCLK  
η
tHLD  
tSU  
BDCLK period  
154  
40  
ns  
%
Duty cycle of BDCLK  
60  
Hold time, data stable after positive edge on BDCLK  
Set-up time, data stable before positive edge on BDCLK  
20  
ns  
ns  
20  
Document #: 38-16004 Rev. *A  
Page 10 of 14  
PRELIMINARY  
CYWUSB6941  
10.1  
Transmit and Receive Timing Diagram  
BXTLEN  
BSEN  
tBXTLEN  
TXMODE  
tBSEN  
BTXEN  
BRCLK  
tBPAOFF  
tBTXEN  
BPAEN  
BTXD  
tCARRIER  
RFOUT  
RXMODE  
BRXEN  
tBRXEN  
RFIN  
tBRXDPB  
BRXD  
tCARRIER = 10 µs minimum  
Figure 10-1. Transmit and Receive Timing Diagram  
Document #: 38-16004 Rev. *A  
Page 11 of 14  
PRELIMINARY  
CYWUSB6941  
11.0  
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  
THÉ  
Equivalent to:  
OUTPUT  
VENIN EQUIVALENT  
ALL INPUT PULSES  
RTH  
VCC  
VTH  
90%  
10%  
90%  
10%  
GND  
Parameter  
R1  
Unit  
Fall time: 1 V/ns  
Rise time: 1 V/ns  
1071  
937  
500  
1.4  
Ω
Ω
Ω
V
V
R2  
RTH  
VTH  
VCC  
3.00  
12.0  
Ordering Information[5]  
Table 12-1. Ordering Information  
Part Number  
Package Name  
42FBGA  
Package Type  
42-ball Fine Ball Grid Array (7 x 5 x 1.2 mm)  
Operating Range  
CYWUSB6941-42BAC  
Commercial  
Note:  
5. Companion part CYWUSB6942 is required for proper operation.  
Document #: 38-16004 Rev. *A  
Page 12 of 14  
PRELIMINARY  
CYWUSB6941  
13.0  
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  
Issue  
Date  
Orig. of  
Change  
REV.  
**  
ECN NO.  
122944  
125914  
Description of Change  
02/26/03  
06/16/03  
LXA  
KKU  
New Data Sheet  
Updates to tables, timing and signals.  
*A  
Document #: 38-16004 Rev. *A  
Page 14 of 14  
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