AeroComm AC4490 User manual

AC4490
AC4490AC4490
AC4490
900 MHz OEM TRANSCEIVERS
900 MHz OEM TRANSCEIVERS900 MHz OEM TRANSCEIVERS
900 MHz OEM TRANSCEIVERS
Specifications Subject to Change
Specifications Subject to ChangeSpecifications Subject to Change
Specifications Subject to Change
User’s Manual
User’s ManualUser’s Manual
User’s Manual
Version 1.5
Version 1.5Version 1.5
Version 1.5
10981 EICHER DRIVE
10981 EICHER DRIVE10981 EICHER DRIVE
10981 EICHER DRIVE
LENEXA, KS 66219
LENEXA, KS 66219LENEXA, KS 66219
LENEXA, KS 66219
[phone]
[phone](800) 492-2320
[phone]
www.aerocomm.com
www.aerocomm.comwww.aerocomm.com
www.aerocomm.com
[e-mail]
[e-mail]@aerocomm.com
[e-mail]

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DOCUMENT INFORMATION
DOCUMENT INFORMATIONDOCUMENT INFORMATION
DOCUMENT INFORMATION
Copyright
CopyrightCopyright
Copyright
Information
InformationInformation
Information Copyright © 2003 AEROCOMM, Inc. All rights reserved.
The information contained in this manual and the accompanying
software programs are copyrighted and all rights are reserved by
AEROCOMM, Inc. AEROCOMM, Inc. reserves the right to make
periodic modifications of this product without obligation to notify
any person or entity of such revision. Copying, duplicating, selling, or otherwise
distributing any part of this product without the prior consent of an authorized
representative of AEROCOMM, Inc. is prohibited.
All brands and product names in this publication are registered
trademarks or trademarks of their respective holders.
This material is preliminary
This material is preliminaryThis material is preliminary
This material is preliminary
Information furnished by AEROCOMM in this specification is believed to be accurate. Devices sold
by AEROCOMM are covered by the warranty and patent indemnification provisions appearing in its
Terms of Sale only. AEROCOMM makes no warranty, express, statutory, and implied or by
description, regarding the information set forth herein. AEROCOMM reserves the right to change
specifications at any time and without notice.
AEROCOMM’s products are intended for use in normal commercial and industrial applications.
Applications requiring unusual environmental requirements such as military, medical life-support
or life-sustaining equipment are specifically not recommended without additional testing for such
application.
Important Document Information
Important Document InformationImportant 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. The family part number will be used throughout this
document, except where specific information for the commercial or industrial temperature versions
is noted.

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DOCUMENT INFORMATION
DOCUMENT INFORMATIONDOCUMENT INFORMATION
DOCUMENT INFORMATION
Revision
RevisionRevision
Revision Description
DescriptionDescription
Description
Version 1.0 3/15/2002 – Initial Release Version
Version 1.1 12/18/2002 – Preliminary Release
Version 1.2 12/20/2002 – Preliminary Release. Changed location of new interface pins for higher
compatibility with AC4424 product family.
Version 1.3 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. Removed Peer-to-Peer bit. Added Auto Destination.
Added Unicast Only bit. Added 500mW product. Revised part numbers. Updated
Channel Number settings.

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FCC INFORMATION
FCC INFORMATIONFCC INFORMATION
FCC INFORMATION
Agency Approval Overview
Agency Approval OverviewAgency Approval Overview
Agency Approval Overview
Part Number
Part NumberPart Number
Part Number US/FCC
US/FCCUS/FCC
US/FCC CAN/IC
CAN/ICCAN/IC
CAN/IC EUR/EN
EUR/ENEUR/EN
EUR/EN Portable
PortablePortable
Portable Mobile
MobileMobile
Mobile Fixed
FixedFixed
Fixed
AC4490-100 X X See Note 1 X-2.5cm* X-2.5cm*
* See RF Exposure warning on next page
Note 1: Specific Absorption Rating (SAR) testing required for portable applications.
Agency Identification Numbers
Agency Identification NumbersAgency Identification Numbers
Agency Identification Numbers
Part Number
Part NumberPart Number
Part Number US/FCC
US/FCCUS/FCC
US/FCC CAN/IC
CAN/ICCAN/IC
CAN/IC EUR/EN
EUR/ENEUR/EN
EUR/EN
AC4490-100 X X
FCC Notice
FCC NoticeFCC Notice
FCC Notice
Labeling Requirements
Labeling RequirementsLabeling Requirements
Labeling Requirements
Antenna Warning
Antenna WarningAntenna Warning
Antenna Warning
WARNING:
WARNING:WARNING:
WARNING: This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference,
and (2) This device must accept any interference received, including
interference that may cause undesired operation.
WARNING:
WARNING:WARNING:
WARNING: This device has been tested with an MMCX connector with the antennas listed
below. When integrated in the OEMs product, these fixed antennas require
installation preventing end-users from replacing them with non-approved
antennas. Any antenna not in the following table must be tested to comply with
FCC Section 15.203 for unique antenna connectors and Section 15.247 for
emissions.
WARNING:
WARNING:WARNING:
WARNING: The Original Equipment Manufacturer (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 above. The FCC identifiers are listed above
in the Agency Identifier Numbers section.

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FCC INFORMATION
FCC INFORMATIONFCC INFORMATION
FCC INFORMATION
Approved Antenna List
Approved Antenna ListApproved 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.
Note: We are still qualifying antennas and will add to this list as that process is completed.
Item
ItemItem
Item Part Number
Part NumberPart Number
Part Number Mfg.
Mfg.Mfg.
Mfg. Frequency
FrequencyFrequency
Frequency
Band
BandBand
Band Type
TypeType
Type Gain
GainGain
Gain
(dBi)
(dBi)(dBi)
(dBi)
AC4490X-100
AC4490X-100AC4490X-100 AC4490X-100
1 S467FL-6-RMM-915S Nearson 902 – 928MHz ½ Wave Dipole 2 PMF
2 S161AH-915R Nearson 902 – 928MHz ½ Wave Dipole 2.5 PMF
3 S331AH-915 Nearson 902 – 928MHz ¼ Wave Dipole 1 PMF
4 1020B5812-04 (Flavus 915) gigaAnt 902 – 928MHz ¼ Wave Snap-In -0.5 PMF
P=Portable, M=Mobile, F=Fixed/Basestation
P=Portable, M=Mobile, F=Fixed/BasestationP=Portable, M=Mobile, F=Fixed/Basestation
P=Portable, M=Mobile, F=Fixed/Basestation
Note: Specific Absorption Rating (SAR) testing required for portable applications.

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FCC INFORMATION
FCC INFORMATIONFCC INFORMATION
FCC INFORMATION
RF Exposure AC4490-100
RF Exposure AC4490-100RF Exposure AC4490-100
RF Exposure AC4490-100
WARNING:
WARNING:WARNING:
WARNING: To comply with FCC RF Exposure requirements, the Original Equipment
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.
The preceding statement must be included as a CAUTION statement in
manuals for products operating with the approved antennas in the previous
table to alert users on FCC RF Exposure compliance.

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TABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
1. OVERVIEW...................................................................................................................................... 9
2. AC4490 SPECIFICATIONS..........................................................................................................10
3. SPECIFICATIONS......................................................................................................................... 11
3.1 INTERFACE SIGNAL DEFINITIONS................................................................................................... 11
3.2 ELECTRICAL SPECIFICATIONS........................................................................................................ 12
3.3 SYSTEM TIMING............................................................................................................................. 12
3.3.1 Serial Interface Data Rate .................................................................................................... 12
3.3.2 Latency Times ....................................................................................................................... 13
3.3.3 Maximum Overall System Throughput.................................................................................. 13
4. CONFIGURING THE AC4490..................................................................................................... 14
4.1 EEPROM PARAMETERS................................................................................................................ 14
4.2 EEPROM CONFIGURATION COMMANDS....................................................................................... 15
4.2.1 EEPROM Byte Read ............................................................................................................. 16
4.2.2 EEPROM Byte Write............................................................................................................. 16
4.2.3 EEPROM Exit Configuration Command.............................................................................. 16
4.3 ON-THE-FLY CONTROL COMMAND REFERENCE............................................................................ 17
4.3.1 Status Request....................................................................................................................... 17
4.3.2 Change Channel without Forced Acquisition Sync............................................................... 17
4.3.3 Change Channel with Forced Acquisition Sync.................................................................... 18
4.3.4 Server/Client Command........................................................................................................ 18
4.3.5 Sync to Channel Command................................................................................................... 19
4.3.6 Power-Down Command........................................................................................................ 19
4.3.7 Power-Down Wake-Up Command........................................................................................ 19
4.3.8 Broadcast Mode.................................................................................................................... 20
4.3.9 Write Destination Address.................................................................................................... 20
4.3.10 Read Destination Address..................................................................................................... 20
4.3.11 Read Digital Inputs............................................................................................................... 21
4.3.12 Read ADC ............................................................................................................................. 21
4.3.13 Report Last Valid RSSI ......................................................................................................... 22
4.3.14 Write Digital Outputs............................................................................................................ 22
4.3.15 Write DAC............................................................................................................................. 23
4.3.16 Set Max Power...................................................................................................................... 23
4.3.17 Transmit Buffer Empty.......................................................................................................... 24
5. THEORY OF OPERATION.......................................................................................................... 25
5.1 HARDWARE INTERFACE ................................................................................................................. 25
5.1.1 GIn (Generic Inputs 0 and 1) (pins 4 and 14 respectively) and GOn (Generic Outputs 0 and
1) (pins 1 and 9 respectively).................................................................................................................... 25
5.1.2 TXD (Transmit Data) and RXD (Receive Data) (pins 2 and 3 respectively) ........................ 25
5.1.3 Hop Frame (pin 6)................................................................................................................ 25
5.1.4 CTS Handshaking (pin 7)...................................................................................................... 26
5.1.5 RTS Handshaking (pin 8)...................................................................................................... 26
5.1.6 9600 Baud/Packet Frame (pin 12)........................................................................................ 26
5.1.7 RSSI (pin 13)......................................................................................................................... 26
5.1.8 UP_Reset (pin 15)................................................................................................................. 27
5.1.9 Command/Data (pin 17) ....................................................................................................... 27
5.1.10 AD In and AD Out (pins 18 and 19 respectively)..................................................................28
5.1.11 In Range (pin 20).................................................................................................................. 28

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5.2 SOFTWARE PARAMETERS............................................................................................................... 28
5.2.1 RF Architecture (Unicast/Broadcast) ................................................................................... 28
5.2.2 RF Mode ............................................................................................................................... 29
5.2.3 Sub Hop Adjust ..................................................................................................................... 29
5.2.4 Duplex Mode......................................................................................................................... 30
5.2.5 Interface Timeout/RF Packet Size......................................................................................... 30
5.2.6 Serial Interface Baud Rate.................................................................................................... 30
5.2.7 Network Topology................................................................................................................. 31
5.2.8 Frequency Offset................................................................................................................... 32
5.2.9 Auto Config........................................................................................................................... 32
5.2.10 Max Power............................................................................................................................ 33
6. APPLICATION EXAMPLES........................................................................................................ 34
7. DIMENSIONS................................................................................................................................. 35
8. ORDERING INFORMATION...................................................................................................... 36
8.1 PRODUCT PART NUMBER TREE ..................................................................................................... 36
8.2 PRODUCT PART NUMBERS............................................................................................................. 36
8.3 DEVELOPER KIT PART NUMBERS .................................................................................................. 37
Figures
FiguresFigures
Figures
Figure 1 – RSSI Voltage vs. Received Signal Strength................................................................................27
Figure 2 - AC4490 Top & Side View...........................................................................................................35
Tables
TablesTables
Tables
Table 1 – Pin Definitions..............................................................................................................................11
Table 2 – Input Voltage Characteristics........................................................................................................12
Table 3 – Output Voltage Characteristics.....................................................................................................12
Table 4 – Maximum Overall System Throughputs.......................................................................................13
Table 5 – EEPROM Parameters....................................................................................................................14
Table 6 – Baud Rate......................................................................................................................................31
Table 7 – US and International RF Channel Number Settings .....................................................................31
Table 8 – Auto Config Parameters................................................................................................................32
Table 9 – Max Power Settings......................................................................................................................33

AC4490 Specifications
AC4490 SpecificationsAC4490 Specifications
AC4490 Specifications
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AC4490 Features
AC4490 FeaturesAC4490 Features
AC4490 Features
!Available in either 3.3V or 5V TTL level serial interface for fast integration
!Drop-in replacement for AC4424 2.4GHz product family1
!Two generic input and output digital lines and integrated DAC/ADC functions
!Frequency Hopping Spread Spectrum for security and interference rejection
!Cost Efficient for high volume applications
!Very low power consumption for battery powered implementations
!Small size for portable and enclosed applications
!Very Low latency and high throughput
!Industrial temperature version available (-40°C to 80°C)
1.
1.1.
1. Overview
OverviewOverview
Overview
The AC4490 is a member of AeroComm’s ConnexRF OEM transceiver family. It is designed for
integration into OEM systems operating under FCC part 15.247 regulations for the 900 MHz ISM band.
The AC4490 is a cost-effective, high performance, 900 MHz frequency hopping spread spectrum
transceiver. It provides an asynchronous TTL level serial interface for OEM Host communications.
Communications include both system and configuration data. The Host supplies system data for
transmission to other Host(s). Configuration data is stored in an on-board EEPROM. All frequency
hopping, synchronization, and 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.
AC4490 transceivers operate in a Point-to-Point or Point-to-Multipoint, Client-Server or Peer-to-Peer
architecture. One transceiver is configured as a Server and there can be one or many Clients. To
establish synchronization between transceivers, the Server emits a beacon. Upon detecting a beacon,
a Client transceiver informs its Host and a RF link is established.
This document contains information about the hardware and software interface between an
AeroComm AC4490 transceiver and an OEM Host. Information includes the theory of operation,
specifications, interface definition, configuration information and mechanical drawing.
The OEM is responsible for ensuring the final product meets all FCC and/or appropriate regulatory
agency requirements listed herein before selling any product.
1See AC4424/AC4490 Integration Guide for details

AC4490 Specifications
AC4490 SpecificationsAC4490 Specifications
AC4490 Specifications
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2.
2.2.
2. AC4490 Specifications
AC4490 SpecificationsAC4490 Specifications
AC4490 Specifications
GENERAL
GENERALGENERAL
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; RX=Receive)
Duty Cycle (TX=Transmit; RX=Receive)Duty Cycle (TX=Transmit; RX=Receive)
Duty Cycle (TX=Transmit; RX=Receive)
10%TX
10%TX10%TX
10%TX 50%TX
50%TX50%TX
50%TX 100%TX
100%TX100%TX
100%TX 100%RX
100%RX100%RX
100%RX Pwr-Down
Pwr-DownPwr-Down
Pwr-Down
AC4490-100: 43mA 95mA 160mA 30mA TBD
Channels (usedto create independent networks) 5 Channel Sets comprising 58 total channels
Security One byte System ID
RADIO
RADIORADIO
RADIO
Frequency Band US/Canada: 902 – 928 MHz
Australia: 915 – 928 MHz
Radio Type Frequency Hopping Spread Spectrum
Output Power (conducted, no antenna) AC4490-100: 50mW typical
Effective Isotropic Radiated Power (EIRP with
3dBi gain antenna) AC4490-100: 100mW typical
Voltage 3.3 or 3.3 - 6V ±2%, ±50mV ripple
Sensitivity -100dBm typical
Range (based on 3dBi gain antenna) AC4490-100: 10,000 ft.
ENVIRONMENTAL
ENVIRONMENTALENVIRONMENTAL
ENVIRONMENTAL
Temperature (Operating) Commercial:
Industrial: AC4490C: 0°C to 60°C AC4490I: -40°C to 80°C
Temperature (Storage) -50°C to +85°C
Humidity (non-condensing) 10% to 90%
PHYSICAL
PHYSICALPHYSICAL
PHYSICAL
Dimensions 1.65” x 1.9” x 0.20”
Antenna AC4490-100: MMCX Jack or Integral Antenna
Weight Less than 0.75 ounce

AC4490 Specifications
AC4490 SpecificationsAC4490 Specifications
AC4490 Specifications
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3.
3.3.
3. Specifications
SpecificationsSpecifications
Specifications
3.1
3.13.1
3.1 I
IIINTERFACE
NTERFACENTERFACE
NTERFACE S
SS
SIGNAL
IGNALIGNAL
IGNAL D
DD
DEFINITIONS
EFINITIONSEFINITIONS
EFINITIONS
The AC4490 has a simple interface that allows OEM Host communications with the transceiver. Table 1
Table 1Table 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. All outputs are 3.3VDC levels and inputs are 5VDC TTL with the exception of
RSSI, AD In and AD Out, which are all analog. All inputs are weakly pulled High and may be left floating
during normal operation.
Table
TableTable
Table 1
11
1 –
––
– Pin Definitions
Pin DefinitionsPin Definitions
Pin Definitions
Pin
PinPin
Pin Type
TypeType
Type Signal Name
Signal NameSignal Name
Signal Name Function
FunctionFunction
Function
1 O GO0 Interruptible Generic Output pin
2 O TXD Transmitted data out of the transceiver
3 I RXD Data input to the transceiver
4 I GI0 Interruptible Generic Input pin
5 GND GND Signal Ground
6 O Hop Frame Active Low when the transceiver is hopping.
7 O CTS Clear to Send – Active Low when the transceiver is ready to accept data for transmission.
8 I RTS Request toSend – When enabled in EEPROM, activeLow when the OEM Host is ready to
accept data from the transceiver. NOTE: Keeping RTS High for too long can cause data loss.
9 O GO1 Generic Output pin
10 PWR VCC 3.3 or 3.3 – 6V ± 2%, ± 50mV ripple
11 PWR VCC 3.3 or 3.3 – 6V ± 2%, ±50mV ripple
12 I 9600_BAUD 9600_BAUD – When pulled logic Low before applying power or resetting the transceiver’s
serial interface is forced to a 9600, 8, N, 1 rate. To exit, transceiver must be reset or power-
cycled with 9600_Baud logic High.
13 O RSSI Received Signal Strength- An analog output giving a relative indication of received signal
strength while inReceive Mode
14 I GI1 Generic Input pin
15 I UP_RESET RESET – Controlled by the AC4490 for power-on reset if left unconnected. After a Stable
power-on, a logic High pulse will reset the AC4490. Do not power-up the transceiver with this
pin tied Low.
16 GND GND Signal Ground
17 I Command/Data When logic Low, transceiver interprets Host data as command data. When logicHigh,
transceiver interprets Host data as transmit data.
18 I AD In Analog Data Input
19 O AD Out Analog Data Output
20 O IN_RANGE InRange–ActiveLowwhena Clientradioisinrangeof aServeronsameChannelwiththesame
System ID.
I = Input to the transceiver O = Output from the transceiver

AC4490 Specifications
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AC4490 Specifications
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3.2
3.23.2
3.2 E
EE
ELECTRICAL
LECTRICALLECTRICAL
LECTRICAL S
SS
SPECIFICATIONS
PECIFICATIONSPECIFICATIONS
PECIFICATIONS
Table
TableTable
Table 2
22
2 – Input Voltage Characteristics
– Input Voltage Characteristics– Input Voltage Characteristics
– Input Voltage Characteristics
Pin
PinPin
Pin Type
TypeType
Type Name
NameName
Name High Min.
High Min.High Min.
High Min. High Max.
High Max.High Max.
High Max. Low Min.
Low Min.Low Min.
Low Min. Low Max.
Low Max.Low Max.
Low Max. Unit
UnitUnit
Unit
3 I RXD 2 5.5 0 0.8 V @ 5µA
4 I GI0 2 5.5 0 0.8 V @ 5µA
8 I RTS 2 5.5 0 0.8 V @ 5µA
12 I 9600_Baud 2 5.5 0 0.8 V @ 5µA
14 I GI1 2 5.5 0 0.8 V @ 5µA
15 I UP_RESET 0.8 5.5 0 0.6 V @ 5µA
17 I Command/Data 2 5.5 0 0.8 V @ 5µA
18 I AD In N/A 3.3 0 N/A V @ 1µA
Table
TableTable
Table 3
33
3 – Output Voltage Characteristics
– Output Voltage Characteristics– Output Voltage Characteristics
– Output Voltage Characteristics
Pin
PinPin
Pin Type
TypeType
Type Name
NameName
Name High Min.
High Min.High Min.
High Min. Low Max.
Low Max.Low Max.
Low Max. Unit
UnitUnit
Unit
1 O GO0 2.5 @ 8mA 0.4 @ 8mA V
2 O TXD 2.5 @ 2mA 0.4 @ 2mA V
6 O Hop Frame 2.5 @ 2mA 0.4 @ 2mA V
7 O CTS 2.5 @ 2mA 0.4 @ 2mA V
9 O GO1 2.5 @ 2mA 0.4 @ 2mA V
12 O Packet Frame 2.5 @ 2mA 0.4 @ 2mA V
13 O RSSI See Figure 1 See Figure 1 V
19 O AD Out N/A N/A V2
20 O IN_RANGE 2.5 @ 2mA 0.4 @ 2mA V
3.3
3.33.3
3.3 S
SS
SYSTEM
YSTEMYSTEM
YSTEM T
TT
TIMING
IMINGIMING
IMING
Care should be taken when selecting transceiver architecture as it can have serious effects on data
rates, latency timings, and overall system throughput. The importance of these three characteristics
will vary from system to system and should be a strong consideration when designing the system.
3.3.1
3.3.13.3.1
3.3.1 Serial Interface Data Rate
Serial Interface Data RateSerial Interface Data Rate
Serial Interface Data Rate
The Serial Interface Data Rate is programmable by the Host. This is the rate the Host and transceiver
communicate over the serial bus. Possible values range from 1200 bps to 115,200 bps. The only
supported mode is asynchronous – 8-bit, No Parity, 1 Start Bit, and 1 Stop Bit.
..
.
2AD Out is an unbuffered, high impedance output and must be buffered by the OEM Host when used.

AC4490 Specifications
AC4490 SpecificationsAC4490 Specifications
AC4490 Specifications
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3.3.2
3.3.23.3.2
3.3.2 Latency Times
Latency TimesLatency Times
Latency Times
TBD
3.3.3
3.3.33.3.3
3.3.3 Maximum Overall System Throughput
Maximum Overall System ThroughputMaximum Overall System Throughput
Maximum Overall System Throughput
When configured as shown in the table below, an AC4490 transceiver is capable
capablecapable
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.
Table
TableTable
Table 4
44
4 – Maximum Overall System Throughputs
– Maximum Overall System Throughputs– Maximum Overall System Throughputs
– Maximum Overall System Throughputs
RF Mode Interface Baud
Rate Duplex FEC Direction Throughput (bps)
Stream 57.6k Half Disabled One way TBD
Stream 57.6k Half Enabled One way TBD
Acknowledge 57.6k Half Disabled One way TBD
Acknowledge 57.6k Full Disabled Both ways TBD

AC4490 Specifications
AC4490 SpecificationsAC4490 Specifications
AC4490 Specifications
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4.
4.4.
4. Configuring the AC4490
Configuring the AC4490Configuring the AC4490
Configuring the AC4490
4.1
4.14.1
4.1 EEPROM P
EEPROM PEEPROM P
EEPROM PARAMETERS
ARAMETERSARAMETERS
ARAMETERS
A Host can program various parameters that are stored in EEPROM and become active after a power-
on reset. Table 5 - EEPROM Parameters
Table 5 - EEPROM ParametersTable 5 - EEPROM Parameters
Table 5 - EEPROM Parameters, gives the locations and descriptions of the parameters that
can be read or written by a Host. Factory default values are also shown. Do not write to any EEPROM
Do not write to any EEPROMDo not write to any EEPROM
Do not write to any EEPROM
addresses other than those listed below. Do not copy a transceiver’s EEPROM data to another
addresses other than those listed below. Do not copy a transceiver’s EEPROM data to anotheraddresses other than those listed below. Do not copy a transceiver’s EEPROM data to another
addresses other than those listed below. Do not copy a transceiver’s EEPROM data to another
transceiver. Doing so may cause the transceiver to malfunction.
transceiver. Doing so may cause the transceiver to malfunction.transceiver. Doing so may cause the transceiver to malfunction.
transceiver. Doing so may cause the transceiver to malfunction.
Table
TableTable
Table 5
55
5 – EEPROM Parameters
– EEPROM Parameters– EEPROM Parameters
– EEPROM Parameters
Parameter
ParameterParameter
Parameter EEPROM
EEPROMEEPROM
EEPROM
Address
AddressAddress
Address Length
LengthLength
Length
(Bytes)
(Bytes)(Bytes)
(Bytes) Range
RangeRange
Range Default
DefaultDefault
Default Description
DescriptionDescription
Description
Product ID 00H 40
40 bytes - Product identifier string.
Includes revision information for
software and hardware.
Sub Hop Adjust 36H 1 00 – FFh 66h This value should only be changed when recommended by Aerocomm
Channel
Number 40H 1 00 – 39h 00h
Set 0 = 00 – 0Fh (US/Canada)
Set 1 = 10 – 2Fh (US/Canada)
Set 2 = 30 – 37h (Australia)
Set 3 = 38h (France High Power)
Set 4 = 39h (France Low Power)
Server/Client
Mode 41H 1 01 – 02h 02h 01h = Server
02h = Client
Baud Rate Low 42H 1 00 – FFh FCh Low Byte of the interface baud rate.
Baud Rate High 43H 1 00h 00h Always 00h
Control 0 45H 1 00010100b
(14h) Settings are: Bit 7 – AeroComm Use Only
AeroComm Use OnlyAeroComm Use Only
AeroComm Use Only
Bit 6 – AeroComm Use Only
AeroComm Use OnlyAeroComm Use Only
AeroComm Use Only
Bit 5 – Sync to Channel
0 = Don't Sync to Channel
1 = Sync to Channel
Bit 4 – AeroComm Use Only
AeroComm Use OnlyAeroComm Use Only
AeroComm Use Only
Bit 3 – Packet Frame
0 = Disable Packet Frame
1 = Use pin 12 as Packet Frame
Bit 2 – RF Mode
0 = RF Stream Mode
1 = RF Acknowledge Mode
Bit 1 – RF Delivery
0 = Addressed
1 = Broadcast
Bit 0 – FEC
0 = No Forward Error Correction
1 = Use Forward Error Correction

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AC4490 Specifications
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Parameter
ParameterParameter
Parameter EEPROM
EEPROMEEPROM
EEPROM
Address
AddressAddress
Address Length
LengthLength
Length
(Bytes)
(Bytes)(Bytes)
(Bytes) Range
RangeRange
Range Default
DefaultDefault
Default Description
DescriptionDescription
Description
Frequency
Offset 46H 1 00 – FFh 00h
Transmit
Retries 4CH 1 01 – FFh 10h
Broadcast
Attempts 4DH 1 01 – FFh 04h
API Control 56H 1 01000011b
(43h) Settings are: Bit 7 – AeroComm Use Only
AeroComm Use OnlyAeroComm Use Only
AeroComm Use Only
Bit 6 – AeroComm Use Only
AeroComm Use OnlyAeroComm Use Only
AeroComm Use Only
Bit 5 – Unicast Only
0 = Receive Unicast and Broadcast
packets
1 = Only receive Unicast packets
Bit 4 – Auto Destination
0 = Use Destination Address
1 = Set Destination to Server
Bit 3 – AeroComm Use Only
AeroComm Use OnlyAeroComm Use Only
AeroComm Use Only
Bit 2 – RTS Enable
0 = RTS Ignored
1 = Transceiver obeys RTS
Bit 1 – Duplex Mode
0 = Half Duplex
1 = Full Duplex
Bit 0 – Auto Config
0 = Use EEPROM values
1 = Auto Configure Values
Interface
Timeout 58H 1 02 – FFh 04h
Sync Channel 5AH 1 00 – 3Fh 01h
RF Packet Size 5BH 1 01 – 40h 46h
CTS On 5CH 1 01 – FFh D2h
CTS On
Hysteresis 5DH 1 01 – FFh ACh
Max Power 63H 1 00 – FFh 60h
Destination ID 70H 6 6 Bytes
System ID 76H 1 00 – FFh 01h
MAC ID 80H 6 6 Bytes Unique IEEE MAC Address
4.2
4.24.2
4.2 EEPROM C
EEPROM CEEPROM C
EEPROM CONFIGURATION
ONFIGURATIONONFIGURATION
ONFIGURATION C
CC
COMMANDS
OMMANDSOMMANDS
OMMANDS
The configuration set allows the Host to modify the operation of the transceiver. If the Command/Data
pin (Pin 17) is pulled logic Low, a transceiver will interpret incoming Host data as Command Data. The
Host can then read and write parameters using the various configuration commands listed below. To
exit Configuration Mode, the Host must perform a hardware or power-on reset or issue an Exit
Command Mode command to the transceiver.

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4.2.1
4.2.14.2.1
4.2.1 EEPROM Byte Read
EEPROM Byte ReadEEPROM Byte Read
EEPROM Byte Read
Upon receiving this command, a transceiver will transmit the desired data from the address requested
by the Host.
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = C0h
Byte 2 = Address
Byte 3 = Length (01…FFh = 1…255 bytes; 00h = 256 bytes)
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = C0h
Byte 2 = Address
Byte 3 = Length
Byte 4…n = Data at requested address(s)
4.2.2
4.2.24.2.2
4.2.2 EEPROM Byte Write
EEPROM Byte WriteEEPROM Byte Write
EEPROM Byte Write
Upon receiving this command, a transceiver will write the data byte to the address specified but will not
echo it back to the Host until the EEPROM write cycle is complete. The write can take as long as
10ms to complete. Following the write cycle, a transceiver will transmit the data byte to the Host.
Multiple byte EEPROM writes are allowed up to a length of 128 bytes. An EEPROM boundary exists
between addresses 7Fh and 80h. No single EEPROM write command shall write to addresses on
both sides of that EEPROM boundary.
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = C1h
Byte 2 = Address
Byte 3 = Length (01 – 80h)
Byte 4…n = Data to store at Address
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = C1h
Byte 2 = Address
Byte 3 = Length (01 – 80h)
Byte 4 = Last data byte written by this command
4.2.3
4.2.34.2.3
4.2.3 EEPROM Exit Configuration Command
EEPROM Exit Configuration CommandEEPROM Exit Configuration Command
EEPROM Exit Configuration Command
The OEM Host can cause the transceiver to exit command mode by issuing the Exit Configuration
Command mode command to the transceiver. However, the transceiver will not reflect any of the
However, the transceiver will not reflect any of theHowever, the transceiver will not reflect any of the
However, the transceiver will not reflect any of the
changes programmed into the EEPROM until the transceiver is reset.
changes programmed into the EEPROM until the transceiver is reset.changes programmed into the EEPROM until the transceiver is reset.
changes programmed into the EEPROM until the transceiver is reset.
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = 56h
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = 56h

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4.3
4.34.3
4.3 O
OO
ON
NN
N-
--
-THE
THETHE
THE-F
-F-F
-FLY
LYLY
LY C
CC
CONTROL
ONTROLONTROL
ONTROL C
CC
COMMAND
OMMANDOMMAND
OMMAND R
RR
REFERENCE
EFERENCEEFERENCE
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. Do not to modify
Do not to modifyDo not to modify
Do not to modify
undocumented static addresses as undesired operation may occur. All “CC” commands must be
undocumented static addresses as undesired operation may occur. All “CC” commands must beundocumented static addresses as undesired operation may occur. All “CC” commands must be
undocumented static addresses as undesired operation may occur. All “CC” commands must be
issued from the Host to the transceiver with Command/Data (Pin 17) pulled logic Low. To exit “CC”
issued from the Host to the transceiver with Command/Data (Pin 17) pulled logic Low. To exit “CC”issued from the Host to the transceiver with Command/Data (Pin 17) pulled logic Low. To exit “CC”
issued from the Host to the transceiver with Command/Data (Pin 17) pulled logic Low. To exit “CC”
mode, simply take the Command/Data pin High.
mode, simply take the Command/Data pin High.mode, simply take the Command/Data pin High.
mode, simply take the Command/Data pin High.
4.3.1
4.3.14.3.1
4.3.1 Status Request
Status RequestStatus Request
Status Request
The Host issues this command to request the status of the transceiver.
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = CCh
Byte 2 = 00h
Byte 3 = 00h
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = CCh
Byte 2 = Firmware version number
Byte 3 = Data1
Where:
Where:Where:
Where:
Data1 =
00 for Server in Normal Operation
01 for Client in Normal Operation
02 for Server in Acquisition Sync
03 for Client in Acquisition Sync
4.3.2
4.3.24.3.2
4.3.2 Change Channel without Forced Acquisition Sync
Change Channel without Forced Acquisition SyncChange Channel without Forced Acquisition Sync
Change Channel without Forced Acquisition Sync
The Host issues this command to change the channel of the transceiver. The transceiver will not begin
acquisition sync until its Range Refresh timer expires.
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = CCh
Byte 2 = 01h
Byte 3 = RF Channel Number (Hexadecimal)
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = CCh
Byte 2 = RF Channel Number (Hexadecimal)

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4.3.3
4.3.34.3.3
4.3.3 Change Channel with Forced Acquisition Sync
Change Channel with Forced Acquisition SyncChange 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.
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = CCh
Byte 2 = 02h
Byte 3 = RF Channel Number (Hexadecimal)
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = CCh
Byte 2 = RF Channel Number (Hexadecimal)
4.3.4
4.3.44.3.4
4.3.4 Server/Client Command
Server/Client CommandServer/Client Command
Server/Client Command
The Host issues this command to change the mode (Server or Client) of the transceiver and can force
the transceiver to actively begin synchronization.
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = CCh
Byte 2 = 03h
Byte 3 = Data1
Where:
Where:Where:
Where:
Data1 =
00 for Server in Normal Operation
01 for Client in Normal Operation
02 for Server in Acquisition Sync
03 for Client in Acquisition Sync
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = CCh
Byte 2 = Software Version Number
Byte 3 = Data1
Where:
Where:Where:
Where:
Data1 = Data1 from Host Command

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4.3.5
4.3.54.3.5
4.3.5 Sync to Channel Command
Sync to Channel CommandSync to Channel Command
Sync to Channel Command
The Host issues this command to change the Sync Channel
Sync ChannelSync Channel
Sync Channel byte. This will only affect operation when
Sync to Channel
Sync to ChannelSync to Channel
Sync to Channel is enabled in the EEPROM
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = CCh
Byte 2 = 05h
Byte 3 = Data1
Where:
Where:Where:
Where:
Data1 = New Sync Channel
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = CCh
Byte 2 = 05h
Byte 3 = Data1
Where:
Where:Where:
Where:
Data1 = Data1 from Host Command
4.3.6
4.3.64.3.6
4.3.6 Power-Down Command
Power-Down CommandPower-Down Command
Power-Down Command
After the Host issues the power-down command to the transceiver, the transceiver will de-assert the
In_Range line after entering power-down. A Client transceiver in power-down will remain in sync with a
Server for a minimum of 2 minutes. To maintain synchronization with the Server, this Client transceiver
should re-sync to the Server at least once every 2 minutes. This re-sync is accomplished by issuing
the Power-Down Wake-Up Command
Power-Down Wake-Up CommandPower-Down Wake-Up Command
Power-Down Wake-Up Command and waiting for the In Range line to go active. Once this occurs,
the Client transceiver is in sync with the Server and can be put back into power-down.
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = CCh
Byte 2 = 06h
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = CCh
Byte 2 = RF Channel Number
4.3.7
4.3.74.3.7
4.3.7 Power-Down Wake-Up Command
Power-Down Wake-Up CommandPower-Down Wake-Up Command
Power-Down Wake-Up Command
The Power-Down Wake-Up Command is issued by the Host to bring the transceiver out of power-
down mode.
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = CCh
Byte 2 = 07h
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = CCh
Byte 2 = RF Channel Number

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4.3.8
4.3.84.3.8
4.3.8 Broadcast Mode
Broadcast ModeBroadcast Mode
Broadcast Mode
The Host issues this command to change the transceiver operation between Addressed Mode
Addressed ModeAddressed Mode
Addressed Mode and
Broadcast Mode
Broadcast ModeBroadcast Mode
Broadcast Mode. If addressed mode is selected the transceiver will send all packets to the radio
designated by the Destination Address
Destination AddressDestination Address
Destination Address programmed in the transceiver.
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = CCh
Byte 2 = 08h
Byte 3 = 00 for addressed mode, 01 for broadcast mode
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = CCh
Byte 2 = 00 for addressed mode, 01 for broadcast mode
4.3.9
4.3.94.3.9
4.3.9 Write Destination Address
Write Destination AddressWrite Destination Address
Write Destination Address
The Host issues this command to the transceiver to change the Destination Address. This is a very
veryvery
very
powerful
powerfulpowerful
powerful command that provides the OEM Host with a means for ad-hoc networking. Only the three
Only the threeOnly the three
Only the three
Least Significant Bytes of the MAC Address are used for packet delivery.
Least Significant Bytes of the MAC Address are used for packet delivery.Least Significant Bytes of the MAC Address are used for packet delivery.
Least Significant Bytes of the MAC Address are used for packet delivery.
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = CCh
Byte 2 = 10h
Bytes 3 – 5 = 00 – FFh corresponding the three LSB’s of the destination MAC Address
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = CCh
Bytes 2 – 4= 00 – FFh corresponding the three LSB’s of the destination MAC Address
4.3.10
4.3.104.3.10
4.3.10 Read Destination Address
Read Destination AddressRead Destination Address
Read Destination Address
The Host issues this command to the transceiver to read the Destination Address. This is a very
veryvery
very
powerful
powerfulpowerful
powerful command that provides the OEM Host with a means for ad-hoc networking. Only the three
Only the threeOnly the three
Only the three
Least Significant Bytes of the MAC Address are used for packet delivery.
Least Significant Bytes of the MAC Address are used for packet delivery.Least Significant Bytes of the MAC Address are used for packet delivery.
Least Significant Bytes of the MAC Address are used for packet delivery.
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = CCh
Byte 2 = 11h
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = CCh
Bytes 2 – 4= 00 – FFh corresponding the three LSB’s of the destination MAC Address