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AeroComm AC4490 User Manual

900 mhz oem
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AC4490
AC4490
AC4490
AC4490
900 MHz OEM TRANSCEIVERS
900 MHz OEM TRANSCEIVERS
900 MHz OEM TRANSCEIVERS
900 MHz OEM TRANSCEIVERS
Specifications Subject to Change
Specifications Subject to Change
Specifications Subject to Change
Specifications Subject to Change
User's Manual
User's Manual
User's Manual
User's Manual
10981 EICHER DRIVE
10981 EICHER DRIVE
10981 EICHER DRIVE
10981 EICHER DRIVE
LENEXA, KS 66219
LENEXA, KS 66219
LENEXA, KS 66219
LENEXA, KS 66219
(800) 492-2320
(800) 492-2320
(800) 492-2320
(800) 492-2320
www.aerocomm.com
www.aerocomm.com
www.aerocomm.com
www.aerocomm.com
wireless@aerocomm.com
wireless@aerocomm.com
wireless@aerocomm.com
wireless@aerocomm.com
Version 1.5
Version 1.5
Version 1.5
Version 1.5

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Summary of Contents for AeroComm AC4490

  • Page 1 AC4490 AC4490 AC4490 AC4490 900 MHz OEM TRANSCEIVERS 900 MHz OEM TRANSCEIVERS 900 MHz OEM TRANSCEIVERS 900 MHz OEM TRANSCEIVERS Specifications Subject to Change Specifications Subject to Change Specifications Subject to Change Specifications Subject to Change User’s Manual User’s Manual User’s Manual...
  • Page 2 Important Document Information Important Document Information The AC4490 transceiver products are available in both commercial and industrial temperature, noted by the character ‘C’ or ‘I’ appended to the end of the family part number. For example, the part number for the commercial temperature version is AC4490C and the part number for the industrial temperature version is AC4490I.
  • Page 3 1/29/2003 – Updated interface baud rate formula/table. Updated current consumption table. Corrected RSSI plot. Updated Interface Timeout information. Renamed product family to AC4490. Multiple byte EEPROM read/write now allowed. Version 1.4 2/18/2003 – Added Max Power byte. Removed Write Enable references. Fixed Power Down/Up command response.
  • Page 4 WARNING: 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 above. The FCC identifiers are listed above in the Agency Identifier Numbers section.
  • Page 5 FCC INFORMATION FCC INFORMATION FCC INFORMATION FCC INFORMATION Approved Antenna List Approved Antenna List Approved Antenna List Approved Antenna List Note: We are still qualifying antennas and will add to this list as that process is completed. Note: We are still qualifying antennas and will add to this list as that process is completed. Note: We are still qualifying antennas and will add to this list as that process is completed.
  • Page 6 FCC INFORMATION FCC INFORMATION FCC INFORMATION FCC INFORMATION RF Exposure AC4490-100 RF Exposure AC4490-100 RF Exposure AC4490-100 RF Exposure AC4490-100 WARNING: WARNING: To comply with FCC RF Exposure requirements, the Original Equipment WARNING: WARNING: Manufacturer (OEM) must ensure that the approved antenna in the previous table must be installed and/or configured to operate with a separation distance of 2.5cm or more from all persons to satisfy RF Exposure compliance.

  • Page 7: Table Of Contents

    ..........................12 YSTEM IMING 3.3.1 Serial Interface Data Rate ....................12 3.3.2 Latency Times ........................13 3.3.3 Maximum Overall System Throughput.................. 13 CONFIGURING THE AC4490 ..................... 14 EEPROM P ........................ 14 ARAMETERS EEPROM C ..................15 ONFIGURATION OMMANDS 4.2.1 EEPROM Byte Read ......................16 4.2.2...
  • Page 8 UMBERS Figures Figures Figures Figures Figure 1 – RSSI Voltage vs. Received Signal Strength ................27 Figure 2 - AC4490 Top & Side View ......................35 Tables Tables Tables Tables Table 1 – Pin Definitions ..........................11 Table 2 – Input Voltage Characteristics......................12 Table 3 –...

  • Page 9: Overview

    RF system data transmission/reception is performed by the transceiver. The AC4490 transceivers can be used as a direct serial cable replacement – requiring no special Host software for operation. They also feature a number of On-the-Fly Control Commands providing the OEM Host with a very versatile interface for any situation.

  • Page 10: Ac4490 Specifications

    AC4490 Specifications AC4490 Specifications AC4490 Specifications AC4490 Specifications 2. 2. 2. 2. AC4490 Specifications AC4490 Specifications AC4490 Specifications AC4490 Specifications GENERAL GENERAL GENERAL GENERAL Interface 20 pin mini-connector Serial Interface Data Rate PC baud rates from 1200 bps to 115,200 bps Power Consumption (typical) Duty Cycle (TX=Transmit;...

  • Page 11: Specifications

    IGNAL IGNAL IGNAL EFINITIONS EFINITIONS EFINITIONS EFINITIONS The AC4490 has a simple interface that allows OEM Host communications with the transceiver. Table 1 Table 1 Table 1 Table 1 – Pin Definitions – Pin Definitions – Pin Definitions – Pin Definitions, shows the connector pin numbers and associated functions. The I/O direction is with respect to the transceiver.

  • Page 12: Electrical

    AC4490 Specifications AC4490 Specifications AC4490 Specifications AC4490 Specifications 3.2 E E E E S S S S LECTRICAL LECTRICAL LECTRICAL LECTRICAL PECIFICATIONS PECIFICATIONS PECIFICATIONS PECIFICATIONS Table Table 2 2 2 2 – Input Voltage Characteristics – Input Voltage Characteristics Table Table –...

  • Page 13: Latency Times

    3.3.3 Maximum Overall System Throughput Maximum Overall System Throughput Maximum Overall System Throughput Maximum Overall System Throughput When configured as shown in the table below, an AC4490 transceiver is capable capable capable capable of achieving the listed throughput. However, in the presence of interference or at longer ranges, the transceiver may not be able to meet these specified throughputs.

  • Page 14: Configuring The Ac4490

    AC4490 Specifications AC4490 Specifications AC4490 Specifications AC4490 Specifications 4. 4. 4. 4. Configuring the AC4490 Configuring the AC4490 Configuring the AC4490 Configuring the AC4490 4.1 EEPROM P EEPROM P EEPROM P EEPROM P ARAMETERS ARAMETERS ARAMETERS ARAMETERS A Host can program various parameters that are stored in EEPROM and become active after a power- on reset.

  • Page 15: Eeprom C C

    Broadcast Attempts 01 – FFh API Control 01000011b Settings are: (43h) Bit 7 – AeroComm Use Only AeroComm Use Only AeroComm Use Only AeroComm Use Only Bit 6 – AeroComm Use Only AeroComm Use Only AeroComm Use Only AeroComm Use Only Bit 5 –...

  • Page 16: Eeprom Byte Read

    AC4490 Specifications AC4490 Specifications AC4490 Specifications AC4490 Specifications 4.2.1 4.2.1 EEPROM Byte Read EEPROM Byte Read 4.2.1 4.2.1 EEPROM Byte Read EEPROM Byte Read Upon receiving this command, a transceiver will transmit the desired data from the address requested by the Host.

  • Page 17: The Ly Ontrol Ommand Eference

    EFERENCE EFERENCE The AC4490 transceiver contains static memory that holds many of the parameters that control the transceiver operation. Using the “CC” command set allows many of these parameters to be changed during system operation. Because the memory these commands affect is static, when the transceiver is reset, these parameters will revert back to the settings stored in the EEPROM.

  • Page 18: Change Channel With Forced Acquisition Sync

    AC4490 Specifications AC4490 Specifications AC4490 Specifications AC4490 Specifications 4.3.3 4.3.3 4.3.3 4.3.3 Change Channel with Forced Acquisition Sync Change Channel with Forced Acquisition Sync Change Channel with Forced Acquisition Sync Change Channel with Forced Acquisition Sync The Host issues this command to change the channel of the transceiver and force the transceiver to immediately begin synchronization.

  • Page 19: Sync To Channel Command

    AC4490 Specifications AC4490 Specifications AC4490 Specifications AC4490 Specifications 4.3.5 4.3.5 4.3.5 4.3.5 Sync to Channel Command Sync to Channel Command Sync to Channel Command Sync to Channel Command The Host issues this command to change the Sync Channel Sync Channel byte. This will only affect operation when...

  • Page 20: Broadcast Mode

    AC4490 Specifications AC4490 Specifications AC4490 Specifications AC4490 Specifications 4.3.8 4.3.8 Broadcast Mode Broadcast Mode 4.3.8 4.3.8 Broadcast Mode Broadcast Mode The Host issues this command to change the transceiver operation between Addressed Mode Addressed Mode and Addressed Mode Addressed Mode Broadcast Mode Broadcast Mode.

  • Page 21: Read Digital Inputs

    AC4490 Specifications AC4490 Specifications AC4490 Specifications AC4490 Specifications 4.3.11 4.3.11 4.3.11 4.3.11 Read Digital Inputs Read Digital Inputs Read Digital Inputs Read Digital Inputs The Host issues this command to read both digital input lines. Host Command: Host Command: Host Command:...

  • Page 22: Report Last Valid Rssi

    AC4490 Specifications AC4490 Specifications AC4490 Specifications AC4490 Specifications 4.3.13 4.3.13 4.3.13 4.3.13 Report Last Valid RSSI Report Last Valid RSSI Report Last Valid RSSI Report Last Valid RSSI As RSSI values are only valid when the local radio is receiving a RF packet from a remote radio, instantaneous RSSI can be very tricky to use.

  • Page 23: Write Dac

    AC4490 Specifications AC4490 Specifications AC4490 Specifications AC4490 Specifications 4.3.15 4.3.15 4.3.15 4.3.15 Write DAC Write DAC Write DAC Write DAC The Host issues this command to write AD Out to a particular voltage. NOTE: AD Out is an unbuffered, high impedance output and must be buffered...

  • Page 24: Transmit Buffer Empty

    AC4490 Specifications AC4490 Specifications AC4490 Specifications AC4490 Specifications 4.3.17 4.3.17 4.3.17 4.3.17 Transmit Buffer Empty Transmit Buffer Empty Transmit Buffer Empty Transmit Buffer Empty The Host issues this command to determine when the RF Transmit buffer is empty. The Host will not receive the transceiver response until that time.

  • Page 25: Theory Of Operation

    TXD (Transmit Data) and RXD (Receive Data) (pins 2 and 3 respectively) The AC4490 accepts 3.3 or 5VDC TTL level asynchronous serial data on the RXD pin and interprets that data as either Command Data or Transmit Data. Data is sent from the transceiver to the OEM Host via the TXD pin.

  • Page 26: Cts Handshaking (Pin 7)

    CTS Handshaking (pin 7) 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 corruption will occur. The transceiver prevents this corruption by asserting CTS High as the buffer fills up and taking CTS Low as the buffer is emptied.

  • Page 27: Up_Reset (Pin 15)

    UP_Reset (pin 15) UP_Reset (pin 15) UP_Reset provides a direct connection to the reset pin on the AC4490 microprocessor. To guarantee a valid power-up reset, this pin should never be tied Low on power-up. For a valid power-on reset, reset must be High for a minimum of 50us.

  • Page 28: Ad In And Ad Out (Pins 18 And 19 Respectively)

    Channel Number in the same coverage area, as the interference between the two Servers will severely Channel Number Channel Number hinder RF communications. The AC4490 runs a Peer-to-Peer type architecture where all transceivers, whether Servers or Clients, can communicate with all other transceivers. To prohibit transceivers from receiving broadcast packets, Unicast Only Unicast Only Unicast Only can be enabled.

  • Page 29: Rf Mode

    FEC. Stream Mode is incompatible with Full Duplex Mode. 5.2.3 5.2.3 5.2.3 5.2.3 Sub Hop Adjust Sub Hop Adjust Sub Hop Adjust Sub Hop Adjust Sub Hop Adjust is an AC4490 protocol parameter and should only be modified at the recommendation of Aerocomm. 2/18/03 2/18/03 2/18/03 2/18/03...

  • Page 30: Duplex Mode

    Duplex Mode In Half Duplex mode, the AC4490 will send a packet out over the RF when it can. This can cause packets sent at the same time by a Server and a Client to collide with each other over the RF. To prevent this, Full Duplex Mode can be enabled.

  • Page 31: Network Topology

    RF Channel Number – RF Channel Number provides a physical separation between co-located networks. The AC4490 is a spread spectrum frequency hopping radio with a fixed hopping sequence. Without synchronizing the different networks to each other, different channel numbers could possibly interfere with each other and create “cross-talk.”...

  • Page 32: Frequency Offset

    Acknowledge Mode and all lower baud rates. It should only be disabled with recommendation baud Acknowledge Mode and all lower baud rates. It should only be disabled with recommendation from AeroComm. from AeroComm. Below is a list containing some of the variables affected by Auto Config and their from AeroComm. from AeroComm.

  • Page 33: Max Power

    Max Power Max Power Max Power provides a means for controlling the RF transmit output power of the AC4490. The following table lists some common values for Max Power and their current consumption. Output power and current consumption can vary by as much as ±10% per radio.

  • Page 34: Application Examples

    AC4490 Specifications AC4490 Specifications AC4490 Specifications AC4490 Specifications 6. 6. 6. 6. Application Examples Application Examples Application Examples Application Examples 2/18/03 2/18/03 2/18/03 2/18/03...

  • Page 35: Dimensions

    AC4490 Specifications AC4490 Specifications 7. 7. 7. 7. Dimensions Dimensions Dimensions Dimensions All AC4490 products measure 1.9”L x 1.65”W. Critical parameters are as follows: • J1 J1 J1 – 20 pin OEM interface connector (Samtec TMM-110-01-L-D-SM, mates with Samtec SMM-110-02-S-D) •...

  • Page 36: Ordering Information

    Ordering Information Ordering Information Ordering Information Ordering Information 8. 8. 8. 8. Ordering Information Ordering Information Ordering Information Ordering Information 8.1 P P P P P P P P N N N N T T T T RODUCT RODUCT RODUCT RODUCT UMBER UMBER...

  • Page 37: Developer

    Ordering Information Ordering Information Ordering Information Ordering Information 8.3 D D D D K K K K P P P P N N N N EVELOPER EVELOPER IT IT IT IT UMBERS UMBERS EVELOPER EVELOPER UMBERS UMBERS Order Developer Kits using the following part number tables: 4.5 –...

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