Anaren Integratted Ra adio A852 20E24 4A91 U Users Manual Relea ase Date e Dec 27 7th 2010 0
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iii Users Manual Mo odel A8520E E24A91 Conten nts 1. 2. 3. 4. 5. O Overview ..............................................................................................................................................................5 1.1. Features...........................................................................................................................................................6 Th heory of Opeeration..............................................................................
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A8520E24A91 – Users Manual Release Date: Dec 27th 2010 Page 5 of 28 1. Overview The A8520E24A91 series modules are surface mount modules integrating a CC85xx PurePath™ wireless audio transceiver with the CC2591 PA/LNA device for increased range and an integral antenna. The module incorporates a crystal, the required RF matching and filtering for FCC compliance as well as filtering on all digital lines for noise reduction and sensitivity. The modules operate in the global non-licensed 2.
Page 6 of 28 1.1.
A8520E24A91 – Users Manual Release Date: Dec 27th 2010 o Page 7 of 28 The protocol implements an entire wireless audio transport mechanism with adaptive frequency usage, retransmission of lost packets as well as a low data rate link for remote control purposes.
Page 8 of 28 DNC (RF-Test) A8520E24A91 – Users Manual Release Date: Dec 27th 2010 2 AVdd 100k 31 HGM 1 3 12 22 30 34 HGM 4 CC259x EN PAEN GND GND GND GND GND GND 100k Bias DNC (AVdd_CC259x) AVdd RF XPAEN/GIO14 10 XLNAEN/GIO15 11 100k AVdd xx X0 X1 RF DVdd 85 48MHz XLNAEN/GIO15 XPAEN/GIO14 33 Vdd 5 VBAT SCL SDA 6 7 SCL SDA GIO12 GIO13 8 9 GIO12 GIO13 IOVdd C VBAT AD2/GIO9 AD1 AD0 WCLK BCLK MCLK CS_N SCLK MOSI MISO GIO1 GIO2 GIO3 15 16 17 18 GIO1 19 GIO2 20 GIO3 21 RST
A8520E24A91 – Users Manual Release Date: Dec 27th 2010 2.1. Page 9 of 28 Network Topology and Nomenclature A A8520E24A91 network consists of one Protocol Master (PM) and one or two Protocol Slave(s) (PS). The PM provides the audio reference clock and controls network association. The PS regenerate the audio reference clock based on the packets received. Audio can be transmitted from the PM to a PS.
Page 10 of 28 A8520E24A91 – Users Manual Release Date: Dec 27th 2010 Figure 2 A8520E24A91 topologies supported for different A8520E24A91 FW revisions 2.2. Adaptive Frequency Hopping The purpose of using frequency hopping in a radio system is to provide diversity that allows data throughput to be maintained even if interfering radio systems or the physical environment (e.g. multipath fading) renders some RF channels unusable. In the 2.
A8520E24A91 – Users Manual Release Date: Dec 27th 2010 Page 11 of 28 minimum data throughput is to be guaranteed (as audio streaming requires). Frequency hopping systems can either implement a fixed sequence of channel hops or adapt its hopping sequence dynamically to the changing environment it operates in.
Page 12 of 28 A8520E24A91 – Users Manual Release Date: Dec 27th 2010 Figure 3 Example of AFH hop sequence (active set in color, trial set in black/gray) The frequency hopping algorithm, when no swaps between the active and trial channel sets occur, goes through a sequence of 70 hops over the course of which every RF channel has been used.
A8520E24A A91 – Userss Manual Release Da ate: Dec 27th 2010 6 7 8 9 2426 6 2430 0 2434 4 2438 8 2.3 3. • • • • • age 13 of 28 8 Pa 15 5 16 6 17 7 18 8 2462 2466 2470 2474 Ap pplicatio ons Wireless he eadphones Wireless he eadsets Wireless sp peakers Wireless sttudio equipm ment Wireless microphones m s 3. Prod duct Appr A roval s The A8520E24A91 1 have been designed to meet FC CC and Industrie Cana ada (IC) reg gulations.
Page 14 of 28 A8520E24A91 – Users Manual Release Date: Dec 27th 2010 3.1.1. FCC Labeling Requirements The A8520E24A91 modules have been labeled with their own FCC ID number and if the FCC ID is not visible when the module is installed inside another device, then the outside of the finished product into which the module is installed must also display a label referring to the enclosed module.
A8520E24A91 – Users Manual Release Date: Dec 27th 2010 Page 15 of 28 Electromagnetic Fields” provides assistance in determining whether proposed or existing transmitting facilities, operations or devices comply with limits for human exposure to Radio Frequency (RF) fields adopted by the Federal Communications Commission (FCC). The bulletin offers guidelines and suggestions for evaluating compliance.
Page 16 of 28 A8520E24A91 – Users Manual Release Date: Dec 27th 2010 3.2.1. IC Labeling Requirements From section 3.2.1 RSS-Gen, Issue 3, December 2010, Labeling Requirements for the Host Device: The host device shall be properly labeled to identify the modules within the host device.
A8520E24A91 – Users Manual Release Date: Dec 27th 2010 Page 17 of 28 3.2.2. RF Exposure All transmitters regulated by IC must comply with RF exposure limits as set forth in RSS-102, Issue 4, section 4, “Exposure Limits”. Furthermore RSS-102, Issue 4, Section 2 “Certification Requirements”, provides assistance in determining the specific requirements for compliance.
Page 18 of 28 A8520E24A91 – Users Manual Release Date: Dec 27th 2010 4. Electrical Characteristics 4.1. Absolute Maximum Ratings Under no circumstances must the absolute maximum ratings given in Table 1 be violated. Stress exceeding one or more of the limiting values may cause permanent damage to the device. Caution! ESD sensitive device. Precaution should be used when handling the device in order to prevent permanent damage.
A85xxE24A91 – Users Manual Release Date: Dec 1st 2010 Page 19 of 28 Parameter Min Max Unit Supply Voltage (Vdd) -0.3 3.6 V Voltage on any digital pin -0.3 Vdd+0.3, max 3.
Page 20 of 28 Figure 4 Module pin-out view A85xxE24A91 – Users Manual Release Date: Dec 1st 2010
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 Pin Type GND DNC (RFTest) GND Common Description CC85xx Pin Pin Name Page 21 of 28 CC259x Pin Pin Number A85xxE24A91 – Users Manual Release Date: Dec 1st 2010 Connecting this pin to anything will significantly affect the performance of the module and may void the end users right, under FCC, to operate the module Common Power/Decoup This pin should not be used unless deemed necessary in particular noisy
Page 22 2 of 28 4.4 4. A85xxxE24A91 – Users Manual R Release Date: Dec 1st 2010 2 Re ecomme nded La ayout mended PCB B layout.
A85xxE24A91 – Users Manual Release Date: Dec 1st 2010 Figure 6 Mounting the module in a corner 4.5. Page 23 of 28 Figure 7 Mounting the module along an edge Power Supply Considerations Noise on the power supply line reduces the sensitivity of a receiver and can modulate onto a transmitters signal, both of which causes a degradation of link quality and hence a reduction in range.
Page 24 of 28 A85xxE24A91 – Users Manual Release Date: Dec 1st 2010 • Add decoupling capacitance to pin 33 (AVdd), 1uF to 2.2uF ceramic capacitor is suggested (do not use Tantalum). • Add a low noise LDO in the supply line to pin 33 (AVdd) (the TPS731xx low Dropout Regulator from TI is recommended). Note that if operated from a battery source there is no need for additional noise reduction.
A85xxE24A91 – Users Manual Release Date: Dec 1st 2010 Page 25 of 28 Master Radio Page Slave Radio Page Target power, set to 0 or lower Alternatively the power calibration can be done immediately after programming of each module using the SPI host controller interface, using the CAL_SET_DATA function. This option is useful if the same image will be used in multiple equipment, of which some have the power turned down further than 0 to save current consumption, however it requires a host processor. 5.2.
Page 26 of 28 A85xxE24A91 – Users Manual Release Date: Dec 1st 2010 Check SWR Proceed only if SWR matches required value (Reset device and Restart programming again) // For each flash page for (int n = 0; n < 31; n++) { // Write page data to the start of the available RAM area SET_ADDR(0x6000, sw); WRITE(0x400, data to be programmed into flash page n , sw); /* While using the image generated by TI- Purepath Wireless Configurator, note that the entire image file generated by PWC-TI is Intel_hex format.
A85xxE24A91 – Users Manual Release Date: Dec 1st 2010 Page 27 of 28 HISTORY Date Aug 8th 2010 Dec 1st 2010 Dec 13th 2010 Author Kirkeby Kirkeby Kirkeby Change Note No./Notes Initial Draft Initial Release, formatting and content chg. Programming and Tx power setting.
Thank you for learning more about the Anaren Integrated Radio (AIR) module line. If you have additional questions, need samples, or would like a quote – please do not hesitate to email the AIR team at AIR@anaren.com or contact any of these authorized distributors of the AIR product line. Worldwide Anaren Microwave, Inc. 6635 Kirkville Road East Syracuse, NY 13057 Tel: +1 315 432 8909 +1 800 411 6596 Fax: +1 315 432 8970 North America Anaren Microwave (Europe), Inc.
