AWP24U

2.4GHz DSSS Wireless USB Dongle 1 Features • • • • • • • • • • • • • • • • • • • • • • • 3 The AWP24U is a 2.4-GHz Direct Sequence Spread Spectrum (DSSS) transceiver USB Dongle that includes Cypress radio transceiver CyFi™ CYRF7936 and CY7C64215 enCoRe III Full Speed USB Controller Chips. Operates in the unlicensed worldwide Industrial, Scientific and Medical (ISM) band (2.400 GHz–2.483 GHz) Full speed USB (12Mbps) USB 2 compliant Dedicated 256 byte buffer 40mA operating current (Transmit @ -5 dBm) Transmit power up to +4 dBm Receive sensitivity up to –97 dBm Sleep Current 4-30 µA Operating range of up to 30m or more. DSSS data rates up to 250 kbps, GFSK data rate of 1 Mbps Auto Transaction Sequencer (ATS) - no micro controller intervention Framing, Length, CRC16, and Auto ACK Fast Startup and Fast Channel Changes Separate 16-byte Transmit and Receive FIFOs AutoRate™ - dynamic data rate reception Receive Signal Strength Indication (RSSI) No proprietary software required Operating voltage 5 volts Operating temperature from 0 to 70°C Size: 59mm x 20mm x 11mm including connector Weight: 5 gm FCC Part 15, EN 300 328-1, EN 301 489-1, EN 301 489-17 and Industry Canada RSS-210 standards certified. AWP24U Data Sheet Applications • PC Human Interface Devices (HID) • • • • Wireless Keyboards and Mice VoIP and Wireless Headsets Wireless Gamepads Remote Control • Consumer • • • • • • Sports and Leisure Equipment Remote Controls Audio Subwoofer Presenter Tools Locator Alarms Toys • Building/Home Automation • • • • • • • Automatic Meter Readers (AMR) On-Site Paging Systems Garage door opener Alarm and Security Lighting Control Climate Control Fan Control • Industrial Control • • • • • • Active RFID and asset tracking systems Inventory Management Point-of-sale systems Factory Automation Data Acquisition USB to Serial • Transportation 2 Functional Description Artaflex AWP24U is based on CyFi™ Transceiver a Radio IC designed for low-power embedded wireless applications. Combined with Cypress’s enCoRe III programmable systemon-chip and a CyFi network protocol stack AWP24U can be used to implement a complete CyFi wireless network system. • • • Remote Keyless Entry with acknowledgement (RKE) Airline Baggage Tracking Diagnostics The AWP24U is tested for functional operation and is FCC/ETSI (EU) certified. The module is supplied with an integrated chip antenna. The AWP24U is available in a small PCB design and can be connected using the USB Type A / B connector. The pin-out of the USB connector is shown in the USB Connector Pin Information. Artaflex Inc. 215 Konrad Crescent Markham, Ontario, Canada L3R8T9 (905) 479-0148 DSAWP24U Rev 3v0 Revised Jan 23, 2009 Page 1 of 10 http://www.artaflexmodules.com 2.4GHz DSSS Wireless USB Dongle AWP24U Data Sheet Figure 1 - Module Block Diagram 5V 3.3V Regulator Switch Integrated Antenna CyFi™ CYRF7936 Full Speed USB Controller Digital Interface J2 Optional Header 3.1 Baseband Modulation RF 12 MHz Crystal Reference Documentation Technical information such as register settings, timing, application interfaces, clocking, and power management for the Cypress TM 2.4-GHz DSSS Radio System-on-Chip and the CY7C64215 enCoReTM Full Speed USB Semiconductor CYRF7936 CyFi Controller are available at www.cypress.com The datasheet for CYRF7936 is available at: http://download.cypress.com.edgesuite.net/design_resources/datasheets/contents/cyrf7936_8.pdf The datasheet for CY7C64215 is available at: http://download.cypress.com.edgesuite.net/design_resources/datasheets/contents/cy7c64215_8.pdf For any firmware or technical details, please visit http://www.artaflexmodules.com/applications.html?cat_id=4 or post your queries at http://www.artaflexmodules.com/contact.html Artaflex Inc. 215 Konrad Crescent Markham, Ontario, Canada L3R8T9 (905) 479-0148 DSAWP24U Rev 3v0 Revised Jan 23, 2009 Page 2 of 10 http://www.artaflexmodules.com 2.4GHz DSSS Wireless USB Dongle 4 AWP24U Data Sheet Functional Overview The AWP24U Module provides a complete USB to RF antenna wireless MODEM. The module is designed to implement wireless device links operating in the worldwide 2.4-GHz ISM frequency band. It is intended for systems compliant with world-wide regulations covered by ETSI EN 301 489-1 V1.41, ETSI EN 300 328-1 V1.3.1 (Europe), FCC CFR 47 Part 15 (USA and Industry Canada) and TELEC ARIB_T66_March, 2003 (Japan). The module contains a 2.4-GHz 1-Mbps GFSK radio transceiver, packet data buffering, packet framer, DSSS baseband controller, Received Signal Strength Indication (RSSI), and SPI interface for data transfer and device configuration. The radio supports 98 discrete 1-MHz channels (regulations may limit the use of some of these channels in certain jurisdictions). In DSSS modes the baseband performs DSSS spreading/de-spreading, while in GFSK Mode (1 Mb/s - GFSK) the baseband performs Start of Frame (SOF), End of Frame (EOF) detection and CRC16 generation and checking. The baseband may also be configured to automatically transmit Acknowledge (ACK) handshake packets whenever a valid packet is received. When in receive mode, with packet framing enabled, the device is always ready to receive data transmitted at any of the supported bit rates, except SDR, enabling the implementation of mixed-rate systems in which different devices use different data rates. This also enables the implementation of dynamic data rate systems, which use high data rates at shorter distances and/or in a lowmoderate interference environment, and change to lower data rates at longer distances and/or in high interference environments. 4.1 Link Layer Modes The AWP24U module supports the following data packet framing features: SOP – Packets begin with a 2-symbol Start of Packet (SOP) marker. This is required in GFSK and 8DR modes, but is optional in DDR mode and is not supported in SDR mode; if framing is disabled then an SOP event is inferred whenever two successive correlations are detected. The SOP_CODE_ADR code used for the SOP is different from that used for the “body” of the packet and if desired may be a different length. SOP must be configured to be the same length on both sides of the link. EOP – There are two options for detecting the end of a packet. If SOP is enabled, then a packet length field may be enabled. GFSK and 8DR must enable the length field. This is the first 8-bits after the SOP symbol, and is transmitted at the payload data rate. If the length field is enabled, an End of Packet (EOP) condition is inferred after reception of the number of bytes defined in the length field, plus two bytes for the CRC16 (if enabled—see below). The alternative to using the length field is to infer an EOP condition from a configurable number of successive non-correlations; this option is not available in GFSK mode and is only recommended to enable when using SDR mode. CRC16 – The device may be configured to append a 16-bit CRC16 to each packet. The CRC16 uses the USB CRC polynomial with the added programmability of the seed. If enabled, the receiver will verify the calculated CRC16 for the payload data against the received value in the CRC16 field. The starting value for the CRC16 calculation is configurable, and the CRC16 transmitted may be calculated using either the loaded seed value or a zero seed; the received data CRC16 will be checked against both the configured and zero CRC16 seeds. CRC16 detects the following errors: • Any one bit in error • Any two bits in error (no matter how far apart, which column, and so on) • Any odd number of bits in error (no matter where they are) • An error burst as wide as the checksum itself 4.2 Packet Buffers All data transmission and reception utilizes the 16-byte packet buffers—one for transmission and one for reception. The transmit buffer allows a complete packet of up to 16-bytes of payload data to be loaded in one burst SPI transaction, and then transmitted with no further micro controller intervention. Similarly, the receive buffer allows an entire packet of payload data up to 16 bytes to be received with no firmware intervention required until packet reception is complete. The AWP24U module supports packet length of up to 40 bytes; interrupts are provided to allow a micro controller to use the transmit and receive buffers as FIFOs. When transmitting a packet longer than 16 bytes, the micro controller can load 16-bytes initially, and add further bytes to the transmit buffer as transmission of data creates space in the buffer. Similarly, when receiving packets longer than 16 bytes, the micro controller must fetch received data from the FIFO periodically during packet reception to prevent it from overflowing. Artaflex Inc. 215 Konrad Crescent Markham, Ontario, Canada L3R8T9 (905) 479-0148 DSAWP24U Rev 3v0 Revised Jan 23, 2009 Page 3 of 10 http://www.artaflexmodules.com 2.4GHz DSSS Wireless USB Dongle 4.3 AWP24U Data Sheet Auto Transaction Sequencer (ATS) The AWP24U module provides automated support for transmission and reception of acknowledged data packets. When transmitting a data packet, the device automatically starts the crystal and synthesizer, enters transmit mode, transmits the packet in the transmit buffer, and then automatically switches to receive mode and waits for a handshake packet and then automatically reverts to sleep mode or idle mode when either an ACK packet is received, or a timeout period expires. Similarly, when receiving in transaction mode, the device waits in receive mode for a valid packet to be received, and then automatically transitions to transmit mode, transmits an ACK packet, and then switches back to receive mode to await the next packet. The contents of the packet buffers are not affected by the transmission or reception of ACK packets. In each case, the entire packet transaction takes place without any need for micro controller firmware action; to transmit data the micro controller simply needs to load the data packet to be transmitted, set the length, and set the TX GO bit. Similarly, when receiving packets in transaction mode, firmware simply needs to retrieve the fully received packet in response to an interrupt request indicating reception of a packet. 4.4 Data Rates By combining the DATA_CODE_ADR code lengths and data transmission modes described above, the AWP24U supports the following modes and data rates. Table 1 - Data Rates RF Transmission Mode GFSK 1,000.00 32-Chip 8DR 250.00 64-chip 8DR[1] 125.00 32-chip DDR[2] 62.50 64-chip DDR[2] 31.25 [1,2] 64-chip SDR 5 Raw Data Rate kbps 15.63 Absolute Maximum Ratings 6 Storage Temperature .............................................................. –65°C to +150°C Ambient Temperature with Power Applied ............................. –55°C to +125°C [3] DC Voltage to Logic Inputs ................................................. –0.3V to VIO +0.3V DC Voltage applied to Outputs in High-Z State .................... –0.3V to VIO +0.3V [4] Static Discharge Voltage (Digital) ........................................................ >2000V [4] Static Discharge Voltage (RF) .............................................................. 1100V Latch-up Current .................................................................. +200 mA, –200 mA Operating Conditions VCC (J2)…………………………………………………… 5.00V VCC (USB)..…………………………..………..…………. 5.00V TA (Ambient Temperature under Bias)……....... 0°C to +70°C Ground Voltage………………………………………………. 0V Notes [1]. Typically data modes with high chip encoding which provides a higher process gain and lower data rates provide longer range and / or a more robust wireless link. [2]. This mode is compatible with Cypress Generation 1 RF WirelessUSB transceiver devices, CYWUSB6934 and CYWUSB6935. [3]. It is permissible to connect voltages above VIO to inputs through a series resistor limiting input current to 1 mA. AC timing not guaranteed. [4]. Human Body Model (HBM). Artaflex Inc. 215 Konrad Crescent Markham, Ontario, Canada L3R8T9 (905) 479-0148 DSAWP24U Rev 3v0 Revised Jan 23, 2009 Page 4 of 10 http://www.artaflexmodules.com 2.4GHz DSSS Wireless USB Dongle AWP24U Data Sheet DC Characteristics (T = 25°C, Vcc = 2.4V, fOSC = 12.000 MHz) 7 Table 2 - DC Characteristics Parameter Description Conditions Typ. Max. Unit VCC Power Supply Voltage 0 to 70ºC 5.00 5.5 V TX ICC ICC during Transmit PA = 5 (-5dBm) 35 48 mA TX ICC ICC during Transmit PA = 6 (0dBm) 41 54 mA TX ICC ICC during Transmit PA = 7 (+4dBm) 48 62 mA RX ICCoff ICC during Receive LNA off, ATT on 33 45 mA RX ICCon ICC during Receive LNA on, ATT off 35 48 mA ISB Sleep Mode Current Icc 10 40.0 µA Artaflex Inc. 215 Konrad Crescent Markham, Ontario, Canada L3R8T9 (905) 479-0148 DSAWP24U Rev 3v0 Revised Jan 23, 2009 Page 5 of 10 http://www.artaflexmodules.com 2.4GHz DSSS Wireless USB Dongle 8 AWP24U Data Sheet RF Characteristics Table 3 – Radio Parameters Parameter Description Conditions RF Frequency Range Min. Typ. 2.400 Max. Unit 2.483 GHz Receiver (T=25°C, VCC = 3.0V, fOSC = 12.000000MHz, BER < 1E-3) Sensitivity 125kbps 64-8DR BER 1E-3 Sensitivity 250-kbps 32-8DR BER 1E-3 Sensitivity CER 1E-3 Sensitivity GFSK BER 1E-3, ALL SLOW = 1 –97 –80 LNA gain ATT gain Maximum Received Signal LNA On RSSI value for PWRin –60 dBm LNA On –15 RSSI slope dBm –93 dBm –87 dBm –84 dBm 22.8 dB –31.7 dB –6 dBm 21 Count 1.9 dB/Count Interference Performance (CER 1E-3) Co-channel Interference rejection Carrier-to-Interference (C/I) C = –60dBm 9 dB Adjacent (±1 MHz) channel selectivity C/I 1 MHz C = –60dBm 3 dB Adjacent (±2 MHz) channel selectivity C/I 2 MHz C = –60dBm –30 dB Adjacent (> 3 MHz) channel selectivity C/I > 3 MHz C = –67dBm –38 dB Out-of-Band Blocking 30 MHz–12.75 MHz[ C = –67dBm –30 dBm Intermodulation C = –64dBm, ∆f = 5, 10 MHz –36 dBm Receive Spurious Emission 800 MHz 100-kHz ResBW –79 dBm 1.6GHz 100-kHz ResBW –71 dBm 3.2 GHz 100-kHz ResBW –65 dBm Transmitter (T = 25°C, VCC = 3.0V) Maximum RF Transmit Power PA = 7 +2 +4 +6 dBm Maximum RF Transmit Power PA = 6 –2 0 +2 dBm Maximum RF Transmit Power PA = 5 –7 –5 –3 dBm Maximum RF Transmit Power PA = 4 –15 –13 –11 dBm Maximum RF Transmit Power PA = 3 –20 –18 –16 dBm Maximum RF Transmit Power PA = 2 –26 –24 –22 dBm Maximum RF Transmit Power PA = 1 –32 –30 –28 dBm Maximum RF Transmit Power PA = 0 –37 –35 –33 dBm RF Power Control Range 39 dB RF Power Control Range Step Size seven steps, monotonic 5.6 dB Frequency Deviation Min PN Code Pattern 10101010 270 kHz Frequency Deviation Max PN Code Pattern 11110000 323 kHz Error Vector Magnitude (FSK error) >0 dBm 10 %rms Occupied Bandwidth –6 dBc, 100-kHz ResBW 876 kHz Artaflex Inc. 215 Konrad Crescent Markham, Ontario, Canada L3R8T9 (905) 479-0148 500 DSAWP24U Rev 3v0 Revised Jan 23, 2009 Page 6 of 10 http://www.artaflexmodules.com 2.4GHz DSSS Wireless USB Dongle AWP24U Data Sheet Table 3 – Radio Parameters (continued) Parameter Description Conditions Min. Typ. Max. Unit Transmit Spurious Emission (PA = 7) In-band Spurious Second Channel Power (±2 MHz) –38 dBm In-band Spurious Third Channel Power (>3 MHz) –44 dBm Non-Harmonically Related Spurs (800MHz) –38 dBm Non-Harmonically Related Spurs (1.6GHz) –34 dBm Non-Harmonically Related Spurs (3.2GHz) –47 dBm Harmonic Spurs (Second Harmonic) –43 dBm Harmonic Spurs (Third Harmonic) –48 dBm Fourth and Greater Harmonics –59 dBm Power Management (with 30ppm crystal) Crystal start to 10ppm 0.7 Crystal start to IRQ XSIRQ EN = 1 Synth Settle Slow channels Synth Settle Synth Settle 1.3 0.6 ms ms 270 µs Medium channels 180 µs Fast channels 100 µs Link turn-around time GFSK 30 µs Link turn-around time 250 kbps 62 µs Link turn-around time 125 kbps 94 µs Link turn-around time