View CYWUSB6941_2067725.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

preliminary wirelessusb? ex rad io cywusb694 1 cypress semiconductor corporation ? 3901 north first street san jose , ca 95134 408-943-2600 document #: 38-16004 rev. *a revised june 10, 2003 1.0 features 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. 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 2.0 applications the CYWUSB6941 is targeted for the following human input device (hid) applications: mice keyboards joysticks/gamepads. rfout brxd bias & pwr cntrl 13m h z xtl osc f requency offset correction brclk bmiso bmosi bdclk bnden x13in rfin pa power con trol pa ctl x13 ln a btxd tx d ata in 4.8 ghz t ransm itter up-convert pa fm demodulator x13out 2.4gh z pll i q f/2 bnpwr bxtlen bsen btxen brxen bpaen serial interface block diagram figure 2-1. CYWUSB6941 block diagram
preliminary cywusb694 1 document #: 38-16004 rev. *a page 2 of 14 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
preliminary cywusb694 1 document #: 38-16004 rev. *a page 3 of 14 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 interfere nce. 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 extern al 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.
preliminary cywusb694 1 document #: 38-16004 rev. *a page 4 of 14 3.3 application examples 3.3.1 application example with the cywusb6942 figure 3-1 shows an application example with external components. [1] note: 1. the matching network components between the rfin, and rfout are chosen based on the usage of a four-layer fr4 pcb (part numbe r pcd-9100). see application notes for additional details on board layout requirements. see application notes for rf critical design considerati ons. figure 3-1. CYWUSB6941 application example with external components CYWUSB6941 x13 x13in rfin rfout radio control in t e r f a c e 12 47pf xtal 68pf 0.1 f v cc1 gnd bnpwr v cc3 v cc4 cywusb6942 1.5pf bnpwr 0.1 f v cc4 0.1 f v cc2 0.1 f v cc1 v cc3 v cc2
preliminary cywusb694 1 document #: 38-16004 rev. *a page 5 of 14 4.0 pin description table 4-1. pin description table for the CYWUSB6941 ball name type default description rf pins e1 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 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 transmit data . transmit data input port. a6 brxd output receive data . demodulated and sliced digital receive data. 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 output data . this is the serial data output pin. a4 bdclk input input clock . this is the serial input clock. b4 bnden input enable . this signal enables the serial communication. power and ground pins b2 vcc1 v cc h v cc pins for rf and analog baseband signals . d1 vcc2 f6 vcc3 e6 vcc4 v cc h v cc pin for digital signals . a1 gnd gnd l ground pins . a7 c2 c3 c7 d2 d3 d4 e2 e3 e4 e5 f1
preliminary cywusb694 1 document #: 38-16004 rev. *a page 6 of 14 f2 gnd gnd l 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. table 4-1. pin description table for the CYWUSB6941 (continued) ball name type default description 1234567 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 1234567 figure 4-1. CYWUSB6941 42-ball fbga top view
preliminary cywusb694 1 document #: 38-16004 rev. *a page 7 of 14 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 figure 5-1. CYWUSB6941 radio/baseband interface diagram btxd brxd brclk btxen brxen bpaen bsen bxtlen bnpw r bdclk bnden bmosi bmiso bclk13m data interface control interface serial interface master clock wirelessusb radio ic CYWUSB6941 wirelessusb baseband cywusb6942
preliminary cywusb694 1 document #: 38-16004 rev. *a page 8 of 14 6.0 absolute maximum ratings storage temperature ............................................................. ............................................... ...............................?65c to +150c ambient temperature with power applied ............................. ............................................................ ........................0c to +70c supply voltage on v cc relative to v ss ............................................ ................................................................................. ?0.3v to +3.9v dc input voltage.................................................................... ........................................... ...............................?0.3v to v cc +0.3v dc voltage applied to outputs in high-z state ....................................................................... ......................................... .................................?0.3v to v cc +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 v cc (supply voltage) ............................................................. ................................................. .................................... 2.7v to 3.6v t a (ambient temperature under bias) .................................. ............................................................ ........................0c to +70c ground voltage ...................................................................... ........................................... ......................................................... 0v f osc (oscillator or crystal frequency) .................................. ............................................................ ................ 13 mhz 20 ppm 8.0 dc characteristics (over the operating range) note: 2. rating measured using the human body model (hbm). table 8-1. dc parameters parameter description conditions min. typ. max. unit v oh output high voltage at i oh = ?2.0 ma 2.4 v v ol output low voltage at i ol = 2.0 ma 0.4 v v ih input high voltage 2.0 v cc v v il input low voltage ?0.3 0.8 v i il input leakage current 0 < v in < v cc ?1 +1 a c in pin input capacitance (except x13, x13in, and rfin) 8pf i sleep current consumption during sleep mode bxtlen = 0 1 10 a i cc (bxtlen) current consumption when crystal oscillator is enabled and stable bnpwr = 1 bxtlen =1 46ma i cc (bsen) current consumption when hop frequency synthesizer is enabled and stable bxtlen = 1 bsen =1 30 40 ma i cc (brxen) current consumption when receiver circuitry is enabled and stable bxtlen = 1 bsen = 1 brxen=1 62 85 ma i cc (btxen) current consumption when transmit circuitry is enabled and stable bxtlen = 1 bsen = 1 btxen =1 45 70 ma i cc (bpaen) current consumption when transmit circuitry and pa are enabled and stable bxtlen = 1 bsen = 1 btxen = 1 bpaen = 1 70 85 ma
preliminary cywusb694 1 document #: 38-16004 rev. *a page 9 of 14 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 = 25c, v cc = 3.3v) [3] sensitivity ber < 10 ?3 -82 ?74 dbm maximum received signal ber < 10 ?3 ?38 ?33 dbm interference performance ber < 10 ?3 co-channel interference rejection carrier-to-interference (c/i) c = ?60 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 image 1 mhz (+3 mhz and +5 mhz) c = ?67 dbm ?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 = 25c, v cc = 3.3v, pa5) maximum rf transmit power pwr setting = pa5 ?11 -6 dbm rf power control range pa0-pa5 23 db rf power range control step size 6 steps, monotonic. 4.6 db frequency deviation 90- 175 khz zero crossing error 125 ns occupied bandwidth 10-khz resolution bandwidth, ?20 dbc 500 khz initial frequency offset 100 khz in-band spurious second channel power ( 2 mhz) ?20 dbm > third channel power (> 3 mhz) ?40 dbm non-harmonically related spurious 30 mhz ? 12.75 ghz ?57 dbm harmonic spurious 2 nd harmonic through 5 th harmonic ?30 dbm notes: 3. ber prbs9 sequence 4. subharmonics of receive frequency excluded.
preliminary cywusb694 1 document #: 38-16004 rev. *a page 10 of 14 10.0 ac characteristics (over the operating range) table 10-1. ac timing parameters name description min. typ. max. unit t r/f rise and fall times on output pins (see ac test loads section 11.0) 3 20 ns t bpwr pulse width for bnpwr for initiating a reset 100 ns t brclk brclk period (duty cycle = 40/60) 1 s t btxdsu set-up time, data stable (on btxd) before positive edge on brclk 250 ns t btxdhld hold time, data stable (on btxd) after positive edge on brclk 0 ns t brxdpd propagation delay of data from rfin to serial data at brxd 3 s t bxtlen time from bxtlen being driven high to crystal oscillator becoming stable 10 ms t bsen time from bsen asserted to hop frequency synthesizer stable 250 s t brxen time from brxen asserted to receiver circuitry stable for data reception 35 s t bpaoff time from last bit transmitted from the baseband to pa off 4 s t btxen time from btxen to bpaen 4 s serial interface timing parameters t bdclk bdclk period 154 ns duty cycle of bdclk 40 60 % t hld hold time, data stable after positive edge on bdclk 20 ns t su set-up time, data stable before positive edge on bdclk 20 ns
preliminary cywusb694 1 document #: 38-16004 rev. *a page 11 of 14 10.1 transmit and receive timing diagram figure 10-1. transmit and receive timing diagram t brxen txmode bxtlen bsen btxen rxmode brxen rfin brxd t carrier = 10 s minimum t brxdpb t bxtlen t bsen t btxen t bpaoff bpa en brclk btxd t carrier rfout
preliminary cywusb694 1 document #: 38-16004 rev. *a page 12 of 14 11.0 ac/dc test loads and waveforms for digital pins 12.0 ordering information [5] table 12-1. ordering information part number package name package type operating range CYWUSB6941-42bac 42fbga 42-ball fine ball grid array (7 x 5 x 1.2 mm) commercial note: 5. companion part cywusb6942 is required for proper operation. 90% 10% v cc gnd 90% 10% all input pulses output 30 pf including jig and scope output r th equivalent to: venin equivalent v th th rise time: 1 v/ns fall time: 1 v/ns output 5 pf including jig and scope max typical parameter unit r1 1071 ? r2 937 ? r th 500 ? v th 1.4 v v cc 3.00 v v cc output r1 r2 ac test loads dc test load
preliminary cywusb694 1 document #: 38-16004 rev. *a page 13 of 14 ? cypress semiconductor corporation, 2003. the information contained herein is subject to change without notice. cypress semico nductor corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a cypress semi conductor product. nor does it convey or imply any license unde r patent or other rights. cypress semiconductor does not authorize its products for use as critical components in life-support syst ems where a malfunction or failure may reasonably be expected t o result in significant injury to the user. the inclusion of cypress semiconductor products in life-support systems application implies th at the manufacturer assumes all risk of such use and in do ing so indemnifies cypress semiconductor against all charges. 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). wirelessusb? ex is a trademark of cypress semiconductor. all product and company names mentioned in this document are the trademarks of their respective holders. 42-ball fbga (7.0 x 5.0 x 1.2 mm) ba42 51-85139-*c figure 13-1. CYWUSB6941 package diagram
preliminary cywusb694 1 document #: 38-16004 rev. *a page 14 of 14 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.

▲Up To Search▲

Price & Availability of CYWUSB6941

	To Download CYWUSB6941 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .