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AeroComm AC4490 User Manual

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Summary of Contents for AeroComm AC4490

  • Page 1 3 . 2 . 1 E R S I O N Downloaded from Elcodis.com electronic components distributor...

  • Page 2: Table Of Contents

    Contents Generic I/O 23 AC4490 TRANSCEIVER MODULE 1 TXD & RXD 23 AC4490 features 1 Hop Frame 23 Overview 1 CTS 23 GND 23 SPECIFICATIONS 3 RTS 23 Test / 9600 Baud 24 Pin Definitions 4 RSSI 24 Electrical Specifications 6...
  • Page 3 Contents Enhanced Receive API 55 Normal Receive Mode (non-API) 55 Loopback Repeater 55 Time Division Multiple Access Network 56 APPENDIX IV - SYNC TO CHANNEL 57 Sync to Channel 57 What is it and do I need it? 57 How do I configure Sync to Channel? 59 I've configured my radios, what's next? 65 Downloaded from Elcodis.com...
  • Page 4 In no event shall AeroComm be responsible or liable for any damages arising: From the use of product; From the loss of use, revenue or profit of the product; or As a result of any event, circumstance, action, or abuse beyond the control of AeroComm, whether such damages be direct, indirect, consequential, special or otherwise and whether such damages are incurred by the person to whom this warranty extends or third party.
  • Page 5 Added 500 mW specifications. Updated part numbers. Added AT Commands. Eliminated Commercial designation; All transceivers are now Industrial qualified. Version 1.7 7/9/04 - Changed Range Refresh so 0x00 is an invalid setting. Updated AC4490-500 output power. Added warranty information. Updated part numbers.
  • Page 6 D O C U M E N T I N F O R M A T I O N Revision Description Version 2.6 7/13/06 - Added AC4490LR-1000 documentation. Added Long Range documentation and EEPROM parameters. Removed Read/Write API Control Commands. Updated ordering information and product tree.

  • Page 7: Ac4490 Transceiver Module

    • Advanced configuration available using AT commands O V E R V I E W The AC4490 is a member of AeroComm’s ConnexRF OEM transceiver family. The AC4490 is a cost effective, high performance, frequency hopping spread spectrum transceiver; designed for integration into OEM systems operating under FCC part 15.247 regulations for the 900 MHz ISM band.
  • Page 8 Note: Unless mentioned specifically by name, the AC4490 modules will be referred to as the “radio” or “transceiver”. Individual naming is used to differentiate product specific features. The host (PC/Microcontroller/Any device to which the AC4490 module is connected) will be referred to as “OEM Host”.

  • Page 9: Specifications

    VPA: 3.3 ±3%, ±100mV ripple * VCC & VPA may be tied together, provided the supply voltage never falls below 3.3 V and is capable of supplying 1.5 A of current. VCC & VPA are internally connected on the AC4490-200 only.
  • Page 10 -50°C to +85°C Humidity (non-condensing) 10% to 90% Physical Dimensions Transceiver w/ MMCX Connector:1.65” x 1.9” x 0.20” Transceiver w/ Integral Antenna: 1.65” x 2.65” x 0.20” AC4490-1x1: 1.00” x 1.00” x 0.162” Certifications AC4490-200A AC4490-200/AC4490LR-200 AC4490-1000 FCC Part 15.247 KQLAC4490-100...

  • Page 11: Pin Definitions

    AC4490 User’s Manual P I N D E F I N I T I O N S The AC4490 has a simple interface that allows OEM Host communications with the transceiver. Table 2 below shows the connector pin numbers and associated functions.
  • Page 12 E N G I N E E R ’ S T I P Design Notes: • All I/O is 3.3V TTL with exception of 5V inputs on AC4490-200. • All inputs are weakly pulled High (10k) and may be left floating during normal operation.

  • Page 13: Electrical Specifications

    S P E C I F I C A T I O N S AC4490 User’s Manual E L E C T R I C A L S P E C I F I C A T I O N S...

  • Page 14: Theory Of Operation

    R F A R C H I T E C T U R E The AC4490 utilizes a Server-Client network where all Clients synchronize their hopping to the Server. The Server transmits a beacon at the beginning of every hop (20 ms). The Client transceivers listen for this beacon and upon hearing it assert In_Range Low and synchronize their hopping with the Server.

  • Page 15: Receive Mode

    T H E O R Y O F O P E R A T I O N AC4490 User’s Manual R e c e i v e M o d e When a transceiver is not in Transmit or Command mode, it will be in Receive Mode listening for data. While in Receive Mode, subsequent data of up to 80 bytes can be received every hop (20 ms).

  • Page 16: Api Control

    A P I C O N T R O L API Control is a powerful feature that the AC4490 offers. When enabled, the API Receive Packet, API Transmit Packet, API Send Data Complete and Enhanced API Receive Packet features provide dynamic packet routing and packet accounting ability to the OEM Host, thereby eliminating the need for extensive programming on the OEM Host side.

  • Page 17: Api Receive Packet

    T H E O R Y O F O P E R A T I O N AC4490 User’s Manual A success will always be displayed when sending broadcast packets after all broadcast attempts have been exhausted. E n h a n c e d A P I R e c e i v e P a c k e t Implemented in v6.7 of the firmware and later.
  • Page 18 T H E O R Y O F O P E R A T I O N be achieved by disabling Long Range Mode; either temporarily using CC Commands or permanently by writing to the EEPROM. Note: Long Range Mode is only available on the AC4490LR-200 and AC4490LR-1000 transceivers. T a b l e 5 : L o n g R a n g e R e q u i r e m e n t s Module Board Number...

  • Page 19: Serial Interface

    S E R I A L C O M M U N I C A T I O N S The AC4490 is a TTL device which can be interfaced to a compatible UART (microcontroller) or level translator to allow connection to serial devices.

  • Page 20: Oem Host Data Rate

    S E R I A L I N T E R F A C E F i g u r e 3 : E v e n P a r i t y B i t Note: Enabling parity cuts throughput and the interface buffer in half. O E M H O S T D A T A R A T E The OEM Host Data Rate is the rate with which the OEM Host and transceiver communicate over the serial interface.

  • Page 21: Interface Timeout / Rf Packet Size

    S E R I A L I N T E R F A C E AC4490 User’s Manual ×10 14.7456 ----------------------------------------------- - BAUD × DesiredBaud BaudH Always 0 BaudL Low 8 bits of BAUD (base 16) T a b l e 7 : B a u d R a t e / I n t e r f a c e T i m e o u t...

  • Page 22: Flow Control

    H A L F D U P L E X / F U L L D U P L E X When Half Duplex communication is chosen, the AC4490 will send a packet out over the RF whenever it can. This can cause packets sent by multiple transceivers at the same time to collide with each other over the RF.

  • Page 23: System Throughput

    S Y S T E M T H R O U G H P U T When operating as shown below, an AC4490 transceiver is capable of achieving the listed throughput. However, in the presence of interference or at longer ranges, the transceiver may be unable to meet the specified throughput.

  • Page 24: Software Interface

    (56 bits) Encryption/Decryption Key is located in EEPROM Bytes 0xD0 – 0xD6. It is highly recommended that this Key be changed from the default. Sync to Channel - The AC4490 is a frequency hopping transceiver with a fixed hopping sequence. Without synchronizing their frequency hopping, collocated systems on different channels can interfere with each other.

  • Page 25: One Beacon Mode / Range Refresh

    A U T O C O N F I G P A R A M E T E R S The AC4490 has several variables that vary by RF mode and architecture. By default, Auto Config is enabled and bypasses the values stored in EEPROM and uses predetermined values for the given operating mode. Below is a list of the variables controlled by Auto Config and their respective predetermined values.

  • Page 26: Interface Options

    M o d e m M o d e Full modem handshaking is supported by the AC4490 when enabled in EEPROM. Modem mode is incompatible with RS-485 DE. The line states are updated a maximum of once per 20 ms and only change when toggled by the appropriate line on the remote radio.

  • Page 27: Rs485 Modem Mode

    Max Power provides a means for controlling the RF output power of the AC4790. Output power and current consumption can vary by as much as ±10% per transceiver for a particular Max Power setting. Contact AeroComm for assistance in adjusting Max Power.

  • Page 28: Timing Diagrams

    F i g u r e 5 : A d d r e s s e d M o d e w i t h F i x e d P a c k e t L e n g t h www.aerocomm.com Downloaded from Elcodis.com...
  • Page 29 T I M I N G D I A G R A M S AC4490 User’s Manual F i g u r e 6 : B r o a d c a s t M o d e w i t h T i m e o u t F i g u r e 7 : B r o a d c a s t M o d e w i t h F i x e d P a c k e t L e n g t h www.aerocomm.com...

  • Page 30: Hardware Interface

    C T S The AC4490 has an interface buffer size of 256 bytes. If the buffer fills up and more bytes are sent to the transceiver before the buffer can be emptied, data loss will occur. The transceiver prevents this loss by asserting CTS High as the buffer fills up and taking CTS Low as the buffer is emptied.

  • Page 31: Rssi

    Interface Baud Rate should be programmed to 9600 baud if that rate is desired for normal operation. E N G I N E E R ’ S T I P Aerocomm does not recommend permantly grounding the Forced_9600 pin. This mode was intended for recovering transceivers from unknown settings and was not intended to be used in real-time communications.

  • Page 32: Up_Reset

    Signal at Re ce iv e r (dBm) U P _ R e s e t UP_Reset provides a direct connection to the reset pin on the AC4490 microprocessor and is used to force a soft reset. C M D / D a t a When logic High, the transceiver interprets incoming OEM Host data as transmit data to be sent to other transceivers and their OEM Hosts.

  • Page 33: Configuring The Ac4490

    AC4490 ONFIGURING THE The AC4490 can be configured using the CC Configuration Commands. The CC Commands can be issued using either Hardware or Software Configuration. To use Hardware Configuration, pin 17 of a transceiver must be asserted Low. Software Configuration can be used by entering AT Command Mode before issuing the CC Commands.

  • Page 34: At Commands

    A T C O M M A N D S The AT Command mode implemented in the AC4490 creates a virtual version of the Command/Data pin. The “Enter AT Command Mode” Command asserts this virtual pin Low (to signify Command Mode) and the “Exit AT Command Mode”...
  • Page 35 C O N F I G U R I N G T H E A C 4 4 9 0 AC4490 User’s Manual T a b l e 1 4 : C o m m a n d Q u i c k R e f e r e n c e...
  • Page 36 C O N F I G U R I N G T H E A C 4 4 9 0 T a b l e 1 4 : C o m m a n d Q u i c k R e f e r e n c e Command Name Command (All Bytes in Hex) Return (All Bytes in Hex)

  • Page 37: Command Descriptions

    C O N F I G U R I N G T H E A C 4 4 9 0 AC4490 User’s Manual C O M M A N D D E S C R I P T I O N S...
  • Page 38 C O N F I G U R I N G T H E A C 4 4 9 0 C ha n g e S yn c C h a n n el The OEM Host issues this command to change the sync channel byte Command: <0xCC>...
  • Page 39 C O N F I G U R I N G T H E A C 4 4 9 0 AC4490 User’s Manual R ea d D e st i n at i o n Ad d r es s The OEM Host issues this command to the transceiver to read the Command: <0xCC>...
  • Page 40 C O N F I G U R I N G T H E A C 4 4 9 0 R ea d A D C The OEM Host issues this command to read any of the three onboard Command: <0xCC> <0x21> <Port> 10-bit A/D converters.
  • Page 41 C O N F I G U R I N G T H E A C 4 4 9 0 AC4490 User’s Manual W r i t e D i g it a l O u t p u t s The OEM Host issues this command to write both digital output lines to Command: <0xCC>...
  • Page 42 C O N F I G U R I N G T H E A C 4 4 9 0 D is ab l e S yn c - t o - Ch a n n el The OEM Host issues this command to disable Sync to Channel mode. Command: <0xCC>...
  • Page 43 C O N F I G U R I N G T H E A C 4 4 9 0 AC4490 User’s Manual EE PROM Byte Re ad Upon receiving this command, a transceiver will respond with the Command: <0xCC> <0xC0> <Start> <Length>...

  • Page 44: Eeprom Parameters

    1 = Enable Encryption bit-5: Sync to Channel 0 = Disable Sync to Channel 1 = Enable Sync to Channel bit-4: Aerocomm Use Only bit-3: Aerocomm Use Only bit-2: Aerocomm Use Only bit-1: RF Delivery 0 = Transmit using Addressed packets...
  • Page 45 E E P R O M P A R A M E T E R S AC4490 User’s Manual T a b l e 1 6 : E E P R O M P a r a m e t e r s...
  • Page 46 E E P R O M P A R A M E T E R S T a b l e 1 6 : E E P R O M P a r a m e t e r s EEPROM Length Parameter...
  • Page 47 E E P R O M P A R A M E T E R S AC4490 User’s Manual T a b l e 1 6 : E E P R O M P a r a m e t e r s...

  • Page 48: Dimensions

    1 .0 1 0 0 .8 2 5 M M C X ja c k 0 .1 4 5 d ia 0 .1 0 0 0 .0 0 0 0 .0 0 0 www.aerocomm.com Downloaded from Elcodis.com electronic components distributor...
  • Page 49 D I M E N S I O N S AC4490 User’s Manual F i g u r e 1 1 : A C 4 4 9 0 w i t h i n t e g r a l g i g a A n t A n t e n n a ( o n b o t t o m ) M e c h a n i c a l 20 pin header, 0.020 sq.
  • Page 50 0.131 RF_PORT 0.031 RESET 0.000 9600_BAUD (TST_MODE) GND (note 2) RSSI VCC (note 1) cut corner indicates pin 1 1.000 AC4490-1X1 RECOMMENDED PAD PATTERN (viewed from top) 0.200 005068004503 1.080 0.080 x 0.040 pad 1.000 0.000 typical 0.860 0.100 typ.
  • Page 51 D I M E N S I O N S AC4490 User’s Manual F i g u r e 1 3 : A C 4 4 9 0 - 1 x 1 P C B C o n s i d e r a t i o n s...

  • Page 52: Ordering Information

    All of the above part numbers can be ordered as a development kit by prefacing the part number with “SDK-”. As an example, part number AC4490-200A can be ordered as a development kit using the part number: SDK-AC4490-200A. All developer’s kits include (2) transceivers, (2) development boards, (2) 7.5 VDC unregulated power supplies, (2) serial cables, (2) USB cables, (2) antennas, configuration/testing software and integration engineering support.

  • Page 53: Compliancy Information

    A C 4 4 9 0 - 1 X 1 Due to the RF antenna trace residing on the OEM Host PCB, the FCC will not grant modular approval for the AC4490- 1x1 and requires the OEM to submit their completed design for approval. Contact AeroComm for the approval procedure.

  • Page 54: Fcc / Ic Requirements For Modular Approval

    WARNING: The OEM must ensure that FCC labeling requirements are met. This includes a clearly visible label on the outside of the OEM enclosure specifying the appropriate AeroComm FCC identifier for this product as well as the FCC notice below. The FCC identifiers are listed above.

  • Page 55: Antenna Requirements

    FCC Section 15.203 for unique antenna connectors and Section 15.247 for emissions. Contact AeroComm for assistance. Caution: Any change or modification not expressly approved by AeroComm could void the user's authority to operate the equipment.

  • Page 56: Appendixi - Sample Power Supply

    UPPLY Below is a simple switching power supply that provides enough current to easily power any Aerocomm OEM module. It utilizes low cost, off the shelf components that fit into a small area. This supply has an input voltage range of +6 volts to +18 volts and will output +3.4 volts at 1.5 amps.

  • Page 57: Schematic

    A P P E N D I X I - S A M P L E P O W E R S U P P L Y AC4490 User’s Manual S C H E M A T I C P C B L A Y O U T www.aerocomm.com...
  • Page 58 A P P E N D I X I - S A M P L E P O W E R S U P P L Y Downloaded from Elcodis.com electronic components distributor...

  • Page 59: Passive Resistor Voltage Divider

    All inputs on the AC4490-200 & AC4490-1000 are weakly pulled high via 10 kohm resistors. The AC4490-200 has 5V inputs while the AC4490-1000 & AC4490-1x1 have 3.3V inputs. The AC4490-200 uses an octal buffer to drop the 5V to the required 3.3V level; the -1000 and -1x1 leave this to the OEM.
  • Page 60 III - API PPENDIX The API feature set of the AC4490 provides powerful packet routing capabilities to the OEM Host. The number of API configurations is endless as individual radios can all be configured differently to suit the OEM Host’s varying needs.

  • Page 61: Appendix Iii - Api

    A P P E N D I X I I I - A P I AC4490 User’s Manual A d d r e s s e d T r a n s m i t A P I To poll radio 1, the SAP transmits the packet using the following format:...

  • Page 62: Receive Api

    A P P E N D I X I I I - A P I The remote response is dependent on the OEM’s specific needs and equipment. In many cases, remote radios are connected to dumb devices without the intelligence to filter out or append specific portions of a packet that is transmitted or received.

  • Page 63: Enhanced Receive Api

    A P P E N D I X I I I - A P I AC4490 User’s Manual E n h a n c e d R e c e i v e A P I When Enhanced Receive API is enabled, the transceiver will receive the reply data + the MAC address of the source radio and one RSSI value;...

  • Page 64: Time Division Multiple Access Network

    A P P E N D I X I I I - A P I & C. If the repeater is set to Broadcast mode, radio A will receive a copy of each packet that it sends. If the repeater has a specific destination address (i.e.

  • Page 65: Appendix Iv - Sync To Channel

    W h a t i s i t a n d d o I n e e d i t ? AeroComm uses frequency hopping protocol with a fixed pseudo-random hopping sequence on our transceivers. This protocol yields superior interference rejection and multipath immunity. The Server radio sends timing beacons out on a regular interval and the Clients hear these beacons and synchronize their frequency hopping to the Server.
  • Page 66 A P P E N D I X I V - S Y N C T O C H A N N E L What happens if you don't enable Sync-to-Channel and you have collocated Servers? You have good odds that you will see a decrease in throughput due to the systems trying to occupy the same frequency at the same time.

  • Page 67: How Do I Configure Sync To Channel

    You will be prompted to install the software on your PC. Once the install is completed, you can open the software from Start -> All Programs -> Aerocomm Wireless -> Aerocomm OEM.exe 1. The software will open and prompt you to select a product. Select AC4490 as the product on the PC settings page (Figure 16).
  • Page 68 A P P E N D I X I V - S Y N C T O C H A N N E L F i g u r e 1 6 : P C S e t t i n g s P a g e 5.
  • Page 69 A P P E N D I X I V - S Y N C T O C H A N N E L AC4490 User’s Manual F i g u r e 1 7 : C o n f i g u r e P a g e - R e a d S u c c e s s f u l 6.
  • Page 70 A P P E N D I X I V - S Y N C T O C H A N N E L F i g u r e 1 8 : H o p M a s t e r S e t t i n g s 7.
  • Page 71 A P P E N D I X I V - S Y N C T O C H A N N E L AC4490 User’s Manual F i g u r e 1 9 : C l i e n t S e t t i n g s 8.
  • Page 72 A P P E N D I X I V - S Y N C T O C H A N N E L F i g u r e 2 0 : S e r v e r # 2 S e t t i n g s 9.

  • Page 73: I've Configured My Radios, What's Next

    A P P E N D I X I V - S Y N C T O C H A N N E L AC4490 User’s Manual F i g u r e 2 1 : C l i e n t S e t t i n g s I ' v e c o n f i g u r e d m y r a d i o s , w h a t ' s n e x t ? Once you have configured all radios, your network should be setup similar to the one shown in Figure 22 below.
  • Page 74 A P P E N D I X I V - S Y N C T O C H A N N E L F i g u r e 2 2 : C e n t r a l i z e d S y n c - t o - C h a n n e l C o n f i g u r a t i o n F i g u r e 2 3 : D a i s y C h a i n S y n c - t o - C h a n n e l C o n f i g u r a t i o n Downloaded from Elcodis.com...

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