AeroComm AC4490 100 Users Manual

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Page 1

AC4490

AC4490AC4490

900 MHz OEM TRANSCEIVERS

900 MHz OEM TRANSCEIVERS900 MHz OEM TRANSCEIVERS

Specifications Su bje ct to Change

Specifications Su bje ct to ChangeSpecifications Su bje ct to Change

User’s Manual

User’s ManualUser’s Manual

Version 1.5

Version 1.5Version 1.5

10981 EICHER DRIVE

10981 EICHER DRIVE10981 EICHER DRIVE

LENEXA, KS 66219

LENEXA, KS 66219LENEXA, KS 66219

(800) 492-2320

(800) 492-2320(800) 492-2320

www.aerocomm.com

www.aerocomm.comwww.aerocomm.com

wireless@aerocomm.com

wireless@aerocomm.comwireless@aerocomm.com

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DOCUMENT INFORMATION

DOCUMENT INFORMATIONDOCUMENT INFORMATION

CopyrightCopyright Information

Information

InformationInformation

This material is preliminary

This material is preliminaryThis material is preliminary

Copyright © 2003 A The information contained in this manual and the accompanying software programs are copyrighted and all rights are reserved by A periodic modification s of thi s produ ct wi thout obligation to notify any person or entity of su ch r e vi sion. Copying, duplicating, sel li n g, or ot h e r wise distributing any part of this product without the prior consent of an authorized representative of A

All brands and product n am e s in this publication are registe r e d trademarks or trademarks of their respective holders.

Information furnis hed by A

EROCOMM

by A

are covered by t he warranty and paten t in demnification provisions appearing in its

Terms of Sale only. A

EROCOMM

, Inc. A

makes no warranty, express, statutory, and implied or by

EROCOMM

in this specification is believed to be accurate. Devices sold

descri pt i on , re g ar di n g th e in f or mat i on se t fo rth he re i n . A

, Inc. reserves the right to make

, Inc. is prohibited.

EROCOMM

reserve s the ri g ht to c h ange

specifications at any time and without notice.

EROCOMM

’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-sustaini ng equipment are spec ifica lly no t recomme nded with out ad dit ional testin g for such application.

Important Document Information

Important Document InformationImportant 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 c ommerc ial temp eratu re vers ion is AC4 490C an d the part numbe r 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

Revision

Revision Description

RevisionRevision

Version 1.0 3/15/2002 – Initial Release Ve rsion Version 1.1 12/18/2002 – Preliminary Release Version 1.2 12/20/2002 – Preliminary Release. C hanged locat ion of n ew interf ace p ins for h igher

Version 1.3 1/29/2003 – Updated interface baud rate formul a/table. Updated curre nt co nsumpt ion

Version 1.4 2/18/2003 – Added Max Power byte. Removed Wr ite En able refere nces. Fixed Power

Description

DescriptionDescription

compatibility with AC4424 pro duc t fa mil y.

table. Corrected RSSI plot. Updated Interface T imeout informat ion. Re named pro duct family to AC4490. Multiple by te EEPR OM read/ write no w allowed.

Down/Up command response. Removed P eer- to-Peer bit. Added Auto Destination. Added Unicast Only bit. Added 500mW product. Rev ised part numbers. Up dated Channel Number settings.

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FCC INFORMATION

FCC INFORMATIONFCC INFORMATION

Agency Approval Overview

Agency Approval OverviewAgency Approval Overview

Part Number

Part Number US/FCC

Part NumberPart Number

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

Part Number

Part Number US/FCC

Part NumberPart Number

AC4490-100 X X

FCC Notice

FCC NoticeFCC Notice

WARNING:

WARNING: This device complies with Part 15 of the FCC Rules. Operation is subject to the

WARNING: WARNING:

US/FCC CAN/IC

US/FCCUS/FCC

US/FCC CAN/IC

US/FCCUS/FCC

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.

CAN/IC EUR/EN

CAN/ICCAN/IC

EUR/EN Portable

EUR/ENEUR/EN

CAN/IC EUR/EN

CAN/ICCAN/IC

Portable Mobile

PortablePortable

Mobile Fixed

MobileMobile

EUR/EN

EUR/ENEUR/EN

Fixed

FixedFixed

Labeling Requirements

Labeling RequirementsLabeling Requirements

WARNING:

WARNING: The Original Equipment Manufacturer (OEM) must ensure that FCC labeling

WARNING: 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.

Antenna Warning

Antenna WarningAntenna Warning

WARNING:

WARNING: This device has been tested with an MMCX connector with the antennas listed

WARNING: WARNING:

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.

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FCC INFORMATION

FCC INFORMATIONFCC INFORMATION

Approved Antenna List

Approved Antenna ListApproved 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.

Frequency

FrequencyFrequency

Item

Item Part Number

Part Number Mfg.

ItemItem

Part NumberPart Number

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 Note: Specific Absorption Rating (SAR) testing required for portable applications.

Mfg.

Mfg.Mfg.

Band

Band Type

BandBand

Type

TypeType

Gain

GainGain (dBi)

(dBi)

(dBi)(dBi)

AC4490X-100

AC4490X-100AC4490X-100

AC4490X-100

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FCC INFORMATION

FCC INFORMATIONFCC INFORMATION

RF Exposure AC4490-100

RF Exposure AC4490-100RF 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.

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

1. OVERVIEW...................................................................................................................................... 9

2. AC4490 SPECIFICATIONS.......................................................................................................... 10

3. SPECIFICATIONS.........................................................................................................................11

3.1 I

3.2 E

3.3 S

NTERFACE SIGNAL DEFINITIONS

LECTRICAL SPECIFICATIONS

YSTEM TIMING

............................................................................................................................. 12

........................................................................................................ 12

................................................................................................... 11

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 P

4.2 EEPROM C

ARAMETERS

ONFIGURATION COMMANDS

................................................................................................................ 14

....................................................................................... 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 O

N-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 H

ARDWAR E IN T E R F AC E

................................................................................................................. 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 S

OFTWARE 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 P

8.2 P

8.3 D

Figures

FiguresFigures

RODUCT PART NUMBER TREE RODUCT PART NUMBERS

EVELOPER KIT PART NUMBERS

............................................................................................................. 36

..................................................................................................... 36

.................................................................................................. 37

Figure 1 – RSSI Voltage vs. Received Signal Strength................................................................................27

Figure 2 - AC4490 Top & Side View........................................................................................................... 35

Tables

TablesTables

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

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AC4490 Specifications

AC4490 SpecificationsAC4490 Specifications

AC4490 Features

AC4490 FeaturesAC4490 Features

Available in either 3.3V or 5V TTL level serial int erface for fast integration

Drop-in replacement for A C 4424 2.4GHz product family

Two generic input and outpu t 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. Overview

Overview

1.1.

OverviewOverview

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 c ommunications. 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 fre quency 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 e nsurin g the fin al produc t meets all F CC and/or approp riate regulat ory agency requirements listed herein before selling any product.

See AC4424/AC4490 Integration Guide for details

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AC4490 Specifications

AC4490 SpecificationsAC4490 Specifications

2. AC4490 Specifications

AC4490 Specifications

2.2.

AC4490 SpecificationsAC4490 Specifications

GENERAL

GENERALGENERAL

Interface 20 pin mini-connect or

Serial Interface Data Rate PC baud rates from 1200 bps to 1 15,200 bp s

Power Consumption (typ ic al) Duty Cycle (TX=Trans mit; RX= Rec eive)

Channels (used to cre ate ind epend ent netw orks) 5 Channel Sets compris ing 58 t ot al c hannels

Security One byte System ID

RADIO

RADIORADIO

Frequency Band US/Canada: 902 – 928 MHz

Radio Type Frequency Hoppi ng Sp read Sp ectr um

Output Power (conducted, no antenna) AC4490-100: 50mW typical

Effective Isotropic Radiated Power (EIRP with

3dBi gain antenna)

Voltage 3.3 or 3.3 - 6V ±2%, ±50mV r ipple

Sensitivity -100dBm typical

Range (based on 3dBi gain antenna) AC4490-100: 10,000 ft.

Duty Cycle (TX=Transmit; RX=Receive)

Duty Cycle (TX=Transmit; RX=Receive)Duty Cycle (TX=Transmit; RX=Receive) 10%TX

10%TX

50%TX

10%TX10%TX

AC4490-100: 43mA 95mA 160mA 30mA TBD

Australia: 915 – 928 MHz

AC4490-100: 100mW typical

50%TX

50%TX50%TX

100%TX

100%TX100%TX

100%RX

100%RX100%RX

Pwr-Down

Pwr-DownPwr-Down

ENVIRONMENTAL

ENVIRONMENTALENVIRONMENTAL

Temperature (Operating) Commercial:

Industrial:

Temperature (Storage) -50°C to +85°C

Humidity (non-condensing) 10% to 90%

PHYSICAL

PHYSICALPHYSICAL

Dimensions 1.65” x 1.9” x 0.20”

Antenna AC4490-100: MMCX Jack or Integral Antenna

Weight Less than 0.75 ounc e

AC4490C: 0°C to 60°C AC4490I: -40°C to 80°C

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AC4490 Specifications

AC4490 SpecificationsAC4490 Specifications

3. Specifications

Specifications

3.3.

SpecificationsSpecifications

NTERFACE

3.1

3.1 IIII

3.13.1

NTERFACE

NTERFACE NTERFACE

IGNAL

SSSS

IGNAL IGNAL

EFINITIONS

DDDD

EFINITIONSEFINITIONS

The AC4490 has a si mple int erface that allows OE M Host c ommunications with the t ransceiver. Ta ble 1

– Pin Definitions

– Pin Definitions, shows the c onnector pi n n umbers and associa ted function s . The I/ O direction is wi th

– Pin Definitions– Pin Definitions

Table 1

Table 1Table 1

respect to the transceiver. Al l output s are 3 .3VDC leve ls and i nputs are 5VDC TTL with t he excepti on of RSSI, AD I n an d AD Out , whi ch a re a ll analog . Al l i nputs are we akly pu lled Hig h and m ay be le ft f lo atin g during normal o perati on.

Table

Table 1111 –

Table Table

Pin Type

PinPin

10 PWR VCC 3.3 or 3.3 – 6V ± 2%, ± 50mV ripple

11 PWR VCC 3.3 or 3.3 – 6V ± 2%, ±50 mV ripple

12 I 9600_BAUD 9600_BAUD – When pulled logic Low before applying power or resetting the transceiver’s

13 O RSSI Received Signal Strength - An analog output givin g a relative i ndicatio n of receive d signal

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

16 GND GND Signal Ground

17 I Command/Data When logic Lo w, tra nsce ive r inte rpre ts Ho st da ta a s co mman d da ta. Whe n lo gic H igh ,

18 I AD In Analog Data Input

19 O AD Out Analog Data Output

20 O IN_RANGE In Range – Active Lo w when a Client rad io is in range of a Serve r on same Cha nnel with the sa me

Type Signal Name

TypeType

1 O GO0 Inte rruptible Generic O utput pin 2 O TXD Transmi tte d da ta out o f t he tra nsce ive r 3 I RXD Data input to the tra nsce iver 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 trans ceive r is ready to acce pt data fo r transmi ssio n. 8 I RTS Request to Send – Whe n ena bled i n E EPR OM, a ctive Lo w whe n the OEM Hos t is re ad y to

9 O GO1 Generic Output pin

Signal Name Function

Signal NameSignal Name

accept data from the transceiver. NOTE: Keeping RTS High for too long can cause data loss.

serial interface is forced to a 9600, 8, N, 1 rate. To exit, transceiver must be reset or powercycled with 9600_Baud logic High.

strength while in Receiv e Mode

power-on, a logic High pulse will reset the AC4490. Do not power-up the transceiver with this pin tied Low.

transceiver i nterp rets Hos t data as tr ans mit d ata.

System ID.

– Pin Definitions

Pin Definitions

– –

Pin DefinitionsPin Definitions

Function

FunctionFunction

I = Input to the transceiver O = Output from the tran sceiver

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1111

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AC4490 Specifications

AC4490 SpecificationsAC4490 Specifications

LECTRICAL

3.2

3.2 EEEE

3.23.2

LECTRICAL

LECTRICAL LECTRICAL

Pin Type

Type Name

PinPin

TypeType 3 I RXD 2 5.5 0 0.8 4 I GI0 2 5.5 0 0.8 8 I RTS 2 5.5 0 0.8

12 I 9600_Baud 2 5.5 0 0.8 14 I GI1 2 5.5 0 0.8 15 I UP_RESET 0.8 5.5 0 0.6 17 I Command/Data 2 5.5 0 0.8 18 I AD In N/A 3.3 0 N/A

SSSS

Pin Type

PinPin

Type Name

TypeType 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 V 20 O IN_RANGE 2.5 @ 2mA 0.4 @ 2mA V

PECIFICATIONS

PECIFICATIONSPECIFICATIONS

Table

Table 2222 – Input Voltage Characteristics

Table Table

Name Hi gh Min.

NameName

Table

Table 3333 – Output Voltage Characteristics

Table Table

– Input Voltage Characteristics

– Input Voltage Characteristics – Input Voltage Characteristics

High Min. High Max.

High Min.High Min.

– Output Voltage Characteristics

– Output Voltage Characteristics – Output Voltage Characteristics

Name High Min.

NameName

High Max. Low Min.

High Max.High Max.

High Min. Low Max.

High Min.High Min.

Low Min. Low Max.

Low Min.Low Min.

Low Max. Unit

Low Max.Low Max.

Low Max. Unit

Low Max.Low Max.

Unit

UnitUnit

Unit

UnitUnit V @ 5µA V @ 5µA V @ 5µA V @ 5µA V @ 5µA V @ 5µA V @ 5µA V @ 1µA

YSTEM

3.3

3.3 SSSS

3.33.3

Care should be taken whe n se lecting t ranscei ver archi tect ure as i t can h ave serio us effe cts 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

3.3.1 Serial Interface Data Rate

3.3.13.3.1

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

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YSTEM

YSTEM YSTEM

Serial Interface Data Rate

Serial Interface Data RateSerial Interface Data Rate

AD Out is an unbuffered, high impedance output and must be buffered by the OEM Host when used.

IMING

TTTT

IMINGIMING

....

1212

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AC4490 Specifications

AC4490 SpecificationsAC4490 Specifications

3.3.2

3.3.2 Latency Times

3.3.23.3.2

TBD

3.3.3

3.3.3 Maximum Overall System Throughput

3.3.33.3.3

Latency Times

Latency TimesLatency Times

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 throughput. However, in the presence of interference or at longer ranges, the transceiver may not be able to meet these specified throughputs.

Table

Table 4444 – Maximum Overall System Throughputs

Table Table

RF Mode Interface Baud

Rate

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

– Maximum Overall System Throughputs

– Maximum Overall System Throughputs – Maximum Overall System Throughputs

Duplex FEC Direction Throughput

capable of achieving the listed

capable capable

(bps)

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AC4490 Specifications

AC4490 SpecificationsAC4490 Specifications

4. Configuring the AC4490

Configuring the AC4490

4.4.

Configuring the AC4490Configuring the AC4490

ARAMETERS

4.1

4.1 EEPROM P

EEPROM P

4.14.1

EEPROM PEEPROM P

A Host can program various parameters that are stored in EEPROM and become active after a poweron reset. Table 5 - EEPROM Parameters can be read or written by a Host. Factory default values are also shown.

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

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.

Product ID 00H 40

Sub Hop Adjust 36H 1 00 – FFh 66h

Server/Client

Baud Rate Low 42H 1 00 – FFh FCh Low Byte of the interf a ce baud rate.

Baud Rate High 43H 1 00h 00h Always 00h

Table 5 - EEPROM Parameters, gives the locations and descriptions of the parameters that

Table 5 - EEPROM ParametersTable 5 - EEPROM Parameters

Parameter

ParameterParameter

Channel

Number

Mode

Control 0 45H 1 00010100b

ARAMETERS

ARAMETERSARAMETERS

EEPROM

EEPROMEEPROM

Address

AddressAddress

40H 1 00 – 39h 00h

41H 1 01 – 02h 02h

Table

Table 5555 – EEPROM Parameters

Table Table

Length

LengthLength (Bytes)

(Bytes) Range

(Bytes)(Bytes)

– EEPROM Parameters

– EEPROM Parameters – EEPROM Parameters

Range Default

RangeRange

Do not write to any EEPROM

Do not write to any EEPROMDo not write to any EEPROM

Default Description

DefaultDefault

40 bytes - Product identifier string. Includes revision information for software and hardware. This value should only be changed when recommended by Aerocomm 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)

01h = Server 02h = Client

Settings are:

(14h)

Bit 7 – AeroComm Use Only Bit 6 – AeroComm Use Only Bit 5 – Sync to Channel

Bit 4 – AeroComm Use Only Bit 3 – Packet Frame

Bit 2 – RF Mode

Bit 1 – RF Delivery

Bit 0 – FEC

AeroComm Use Only

AeroComm Use OnlyAeroComm Use Only AeroComm Use Only

AeroComm Use OnlyAeroComm Use Only

0 = Don't Sync to Channel 1 = Sync to Channel

AeroComm Use Only

AeroComm Use OnlyAeroComm Use Only

0 = Disable Packet Frame 1 = Use pin 12 as Packet Fr ame

0 = RF Stream Mode 1 = RF Acknowledge Mode

0 = Addressed 1 = Broadcast

0 = No Forward Error Correction 1 = Use Forward Error Correction

Description

DescriptionDescription

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AC4490 Specifications

AC4490 SpecificationsAC4490 Specifications

EEPROM

EEPROMEEPROM

Parameter

ParameterParameter

Frequency

Offset

Transmit

Retries 4CH 1 01 – FFh 10h

Broadcast

Attempts 4DH 1 01 – FFh 04h

API Control 56H 1 01000011b

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

Address

AddressAddress

46H 1 00 – FFh 00h

Length

LengthLength (Bytes)

(Bytes) Range

(Bytes)(Bytes)

Range Default

RangeRange

Default Description

DefaultDefault

Settings are:

(43h)

Bit 7 – AeroComm Use Only Bit 6 – AeroComm Use Only Bit 5 – Unicast Only

Bit 4 – Auto Destination

Bit 3 – AeroComm Use Only Bit 2 – RTS Enable

Bit 1 – Duplex Mode

Bit 0 – Auto Config

AeroComm Use Only

AeroComm Use OnlyAeroComm Use Only AeroComm Use Only

AeroComm Use OnlyAeroComm Use Only

0 = Receive Unicast and Broadcast packets 1 = Only receive Unicast packets

0 = Use Destination Address 1 = Set Destination to Serv er

AeroComm Use Only

AeroComm Use OnlyAeroComm Use Only

0 = RTS Ignored 1 = Transceiver obeys RTS

0 = Half Duplex 1 = Full Duplex

0 = Use EEPROM values 1 = Auto Configure Values

Description

DescriptionDescription

ONFIGURATION

4.2

4.2 EEPROM C

EEPROM C

4.24.2

EEPROM CEEPROM C

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, th e Host must perform a h ardware or p ower-on rese t or issu e an Exi t Command Mode command to the transceiver.

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ONFIGURATION

ONFIGURATION ONFIGURATION

OMMANDS

CCCC

OMMANDSOMMANDS

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4.2.1

4.2.1 EEPROM Byte Read

4.2.14.2.1

Upon receiving this command, a transceiver will transmit the desired data from the address requested by the Host.

Host Command:

Host Command:Host Command:

Transceiver Response:

Transceiver Response:Transceiver Response:

4.2.2

4.2.2 EEPROM Byte Write

4.2.24.2.2

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 w rite 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.

EEPROM Byte Read

EEPROM Byte ReadEEPROM Byte Read

Byte 1 = C0h Byte 2 = Address Byte 3 = Length (01…FFh = 1…255 bytes; 00h = 256 bytes)

Byte 1 = C0h Byte 2 = Address Byte 3 = Length Byte 4…n = Data at requested address(s)

EEPROM Byte Write

EEPROM Byte WriteEEPROM Byte Write

Host Command:

Host Command:Host Command:

Byte 1 = C1h Byte 2 = Address Byte 3 = Length (01 – 80h) Byte 4…n = Data to store at Addres s

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

4.2.3 EEPROM Exit Configuration Command

4.2.34.2.3

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

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:

Transceiver Response:

Transceiver Response:Transceiver Response:

EEPROM Exit Configuration Command

EEPROM Exit Configuration CommandEEPROM Exit Configuration Command

Byte 1 = 56h

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

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NNNN

THE

4.3

4.3 OOOO

4.34.3

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

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

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.

4.3.1

4.3.1 Status Request

4.3.14.3.1

The Host issues this command to request the status of the transceiver.

Host Command:

Host Command:Host Command:

Transceiver Response:

Transceiver Response:Transceiver Response:

----

Status Request

Status RequestStatus Request

Byte 1 = CCh Byte 2 = 00h Byte 3 = 00h

Byte 1 = CCh Byte 2 = Firmware version number Byte 3 = Data1

THETHE

-F

-F-F

LY LY

CCCC

ONTROL

ONTROL ONTROL

OMMAND

CCCC

OMMAND OMMAND

EFERENCE

RRRR

EFERENCEEFERENCE

Do not to modify

Do not to modifyDo not to modify

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

4.3.2 Change Channel without Forced Acquisition Sync

4.3.24.3.2

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:

Transceiver Response:

Transceiver Response:Transceiver Response:

Change Channel without Forced Acquisition Sync

Change Channel without Forced Acquisition SyncChange Channel without Forced Acquisition Sync

Byte 1 = CCh Byte 2 = 01h Byte 3 = RF Channel Number (Hexadecimal)

Byte 1 = CCh Byte 2 = RF Channel Number (Hexadecimal)

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4.3.3

4.3.3 Change Channel with Forced Acquisition Sync

4.3.34.3.3

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:

Transceiver Response:

Transceiver Response:Transceiver Response:

4.3.4

4.3.4 Server/Client Command

4.3.44.3.4

The Host issues this command to change the mode (Server or Client) of the transceiver and can forc e the transceiver to actively begin synchronization.

Host Command:

Host Command:Host Command:

Change Channel with Forced Acquisition Sync

Change Channel with Forced Acquisition SyncChange Channel with Forced Acquisition Sync

Byte 1 = CCh Byte 2 = 02h Byte 3 = RF Channel Number (Hexadecimal)

Byte 1 = CCh Byte 2 = RF Channel Number (Hexadecimal)

Server/Client Command

Server/Client CommandServer/Client Command

Byte 1 = CCh Byte 2 = 03h Byte 3 = Data1

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:

Byte 1 = CCh Byte 2 = Software Version Number Byte 3 = Data1

Where:

Where:Where: Data1 = Data1 fro m Host Command

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4.3.5

4.3.5 Sync to Channel Command

4.3.54.3.5

Sync to Channel Command

Sync to Channel CommandSync to Channel Command

The Host issues this command to change the Sync Channel

Sync to Channel

Sync to Channel is enabled in the EEPROM

Sync to ChannelSync to Channel

Host Command:

Host Command:Host Command:

Byte 1 = CCh Byte 2 = 05h Byte 3 = Data1

Where:

Where:Where: Data1 = New Syn c C h annel

Transceiver Response:

Transceiver Response:Transceiver Response:

Byte 1 = CCh Byte 2 = 05h Byte 3 = Data1

Where:

Where:Where: Data1 = Data1 fro m Host Command

4.3.6

4.3.6 Power-Down Command

4.3.64.3.6

After the Host issues the power-down command to the transceiver, the transceiver will de-assert the In_Range line after e nteri ng powe r-down. A Cli ent transce iver i n powe r-down wi ll remain in syn c wit h 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 the Client transceiver is in sync with the Server and can be put back into power-down.

Power-Down Command

Power-Down CommandPower-Down Command

Power-Down Wake-Up Command and waiting for the In Range line to go active. Once this occu rs,

Power-Down Wake-Up CommandPower-Down Wake-Up Command

Sync Channel byte. This will only affect operation when

Sync ChannelSync Channel

Host Command:

Host Command:Host Command:

Byte 1 = CCh Byte 2 = 06h

Transceiver Response:

Transceiver Response:Transceiver Response:

Byte 1 = CCh Byte 2 = RF Channel Numb er

4.3.7

4.3.7 Power-Down Wake-Up Command

4.3.74.3.7

The Power-Down Wake-Up Command is issued by the Host to bring the transceiver out of powerdown mode.

Host Command:

Host Command:Host Command:

Transceiver Response:

Transceiver Response:Transceiver Response:

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Power-Down Wake-Up Command

Power-Down Wake-Up CommandPower-Down Wake-Up Command

Byte 1 = CCh Byte 2 = 07h

Byte 1 = CCh Byte 2 = RF Channel Numb er

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4.3.8

4.3.8 Broadcast Mode

4.3.84.3.8

Broadcast Mode

Broadcast ModeBroadcast Mode

The Host issues this command to change the transceiver operation between Addressed Mode

Broadcast Mode

Broadcast Mode. If addressed mode is selected the transceiver will send all packets to the radio

Broadcast ModeBroadcast Mode designated by the Destination Address

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:

Byte 1 = CCh Byte 2 = 00 for addressed mode, 01 for broadcast mode

4.3.9

4.3.9 Write Destination Address

4.3.94.3.9

The Host issues this command to the transceiver to change the Destination Address. This is a very

powerful

powerful command that provides the OEM Host with a means for ad-hoc networking. Only the three

powerful powerful

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:

Transceiver Response:

Transceiver Response:Transceiver Response:

Write Destination Address

Write Destination AddressWrite Destination Address

Byte 1 = CCh Byte 2 = 10h Bytes 3 – 5 = 00 – FFh corresponding the three LSB’s of th e destination MAC Address

Byte 1 = CCh Bytes 2 – 4= 00 – FFh corr esponding the three LSB’s of the destination MAC Address

Destination Address programmed in the transceiver.

Destination AddressDestination Address

Addressed Mode and

Addressed ModeAddressed Mode

very

veryvery

Only the three

Only the threeOnly the three

4.3.10

4.3.10 Read Destination Address

4.3.104.3.10

The Host issues this command to the transceiver to read the Destination Address. This is a very

powerful

powerful command that provides the OEM Host with a means for ad-hoc networking. Only the three

powerful powerful

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:

Transceiver Response:

Transceiver Response:Transceiver Response:

Read Destination Address

Read Destination AddressRead Destination Address

very

veryvery

Only the three

Only the threeOnly the three

Byte 1 = CCh Byte 2 = 11h

Byte 1 = CCh Bytes 2 – 4= 00 – FFh corr esponding the three LSB’s of the destination MAC Address

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4.3.11

4.3.11 Read Digital Inputs

4.3.114.3.11

The Host issues this command to read both digital input lines.

Host Command:

Host Command:Host Command:

Transceiver Response:

Transceiver Response:Transceiver Response:

4.3.12

4.3.12 Read ADC

4.3.124.3.12

The Host issues this command to read any of the three onboard A/D converters.

Host Command:

Host Command:Host Command:

Read Digital Inputs

Read Digital InputsRead Digital Inputs

Byte 1 = CCh Byte 2 = 20h

Byte 1 = CCh Byte 2 = Data1

Where:

Where:Where: Data1 = bit 0 – GI0, bit 1 – GI1

Read ADC

Read ADCRead ADC

Byte 1 = CCh Byte 2 = 21h Byte 3 = Data1

Where:

Where:Where: Data1 = 00h – AD In, 01h – Temperature, 02h – RSSI

Transceiver Response:

Transceiver Response:Transceiver Response:

Byte 1 = CCh Byte 2 = Data1 Byte 3 = Data2

Where:

Where:Where: Data1 = MSB of requested 12 b it A DC value Data2 = LSB of requested 12 bit ADC value

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4.3.13

4.3.13 Report Last Valid RSSI

4.3.134.3.13

As RSSI values are only valid when the local radio i s rece iving a RF packet from a remot e radio, instantaneous RSSI can be very tricky to use. Therefore, the transceiver stores the most recent valid RSSI value. The Host issues this command to request that value. Note : This value wi ll default to FFh i f no valid RSSI measurement has been made.

Host Command:

Host Command:Host Command:

Transceiver Response:

Transceiver Response:Transceiver Response:

4.3.14

4.3.14 Write Digital Outputs

4.3.144.3.14

The Host issues this command to write both digital output lines to particular states.

Report Last Valid RSSI

Report Last Valid RSSIReport Last Valid RSSI

Byte 1 = CCh Byte 2 = 22h

Byte 1 = CCh Byte 2 = Data1

Where:

Where:Where: Data1 = Most significant 8 bits of last valid RSSI reading.

Write Digital Outputs

Write Digital OutputsWrite Digital Outputs

Host Command:

Host Command:Host Command:

Byte 1 = CCh Byte 2 = 23h

Transceiver Response:

Transceiver Response:Transceiver Response:

Byte 1 = CCh Byte 2 = Data1

Where:

Where:Where: Data1 = bit 0 – GO0, bit 1 – GO1

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4.3.15

4.3.15 Write DAC

4.3.154.3.15

The Host issues this command to write AD Out to a particular voltage. NOTE: AD Out is an unbuffere d, high impedance output and must be buffered

Host Command:

Host Command:Host Command:

Transceiver Response:

Transceiver Response:Transceiver Response:

Write DAC

Write DACWrite DAC

Byte 1 = CCh Byte 2 = 24h Byte 3 = Data1 Byte 4 = Data2

Where:

Where:Where: Data1 = Update Period where: T Data2 = Duty Cycle where: Vout = (Data2 / 1 00h) * Vcc

Byte 1 = CCh Byte 2 = Data1 Byte 3 = Data2

Where:

Where:Where: Data1 = Data1 fro m Host Command Data2 = Data2 fro m Host Command

must be buffered by the OEM Host when used.

must be bufferedmust be buffered

= (255 * (Data1 + 1)) / 14.7256

Update

+06

4.3.16

4.3.16 Set Max Power

4.3.164.3.16

The Host Issues this command to limit the maximum transmit power emitted by the transceiver. This can be useful to minimize current consumption and satisfy certain regulatory requirements.

Host Command:

Host Command:Host Command:

Transceiver Response:

Transceiver Response:Transceiver Response:

Set Max Power

Set Max PowerSet Max Power

Byte 1 = CCh Byte 2 = 25h Byte 3 = Data1

Where:

Where:Where: Data1 = New Max Power

Byte 1 = CCh Byte 2 = Data1

Where:

Where:Where: Data1 = Data1 fro m Host Command

Max Power

Max PowerMax Power

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4.3.17

4.3.17 Transmit Buffer Empty

4.3.174.3.17

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.

Host Command:

Host Command:Host Command:

Transceiver Response:

Transceiver Response:Transceiver Response:

Transmit Buffer Empty

Transmit Buffer EmptyTransmit Buffer Empty

Byte 1 = CCh Byte 2 = 30h

Byte 1 = CCh Byte 2 = 00h

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5. Theory of Operation

Theory of Operation

5.5.

Theory of OperationTheory of Operation

ARDWARE INTERFACE

5.1

5.1 HHHH

5.15.1

Below is a description of all hardware pins used to control the AC4490.

5.1.1

5.1.1 GIn (Generic Inputs 0 and 1) (pins 4 and 14 respectively) and GOn

5.1.15.1.1 (Generic Outputs 0 and 1) (pins 1 and 9 respectively)

(Generic Outputs 0 and 1) (pins 1 and 9 respectively)

(Generic Outputs 0 and 1) (pins 1 and 9 respectively)(Gener ic Outputs 0 and 1) (pins 1 and 9 respectively)

Both GIn pins, when enabled in EEPROM, serve as negative-going edge triggered generic input pins. Both GOn pins, when enabled in EEPROM, serve as generic output pins. The following functions can be accomplished with these pins.

GIn/GOn Options:

GIn/GOn Options:GIn/GOn Options:

ARDWARE INTERFACE

ARDWARE INTERFACEARDWARE INTERFACE

GIn (Generic Inputs 0 and 1) (pins 4 and 14 respectively) and GOn

GIn (Generic Inputs 0 and 1) (pins 4 and 14 respectively) and GOnGIn (Generic Inputs 0 and 1) (pins 4 and 14 respectively) and GOn

1) A negative-going edge is detected on either GIn pin. The state of both pins is transmitted over the RF (as configured by RF Mode remote radio(s).

RF Mode) and will be presented to corresponding GOn pins on the

RF ModeRF Mode

2) A “CC” command is issued to force an update on remote radio’s GOn pins. The state of both local GIn lines is transmitted over the RF (as configured by RF Mode corresponding Gon pins on the remote radio(s).

3) The

4) The

5) A “CC” command is issued to write the GOn pins on a remote radi o to particular stat es.

5.1.2

5.1.2 TXD (Transmit Data) and RXD (Receive Data) (pins 2 and 3 respectively)

5.1.25.1.2

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. The data must be of the format 8-N-1 (8 data bits, No Parity bits, One stop bit).

5.1.3

5.1.3 Hop Frame (pin 6)

5.1.35.1.3

Read Digital Inputs

Read Digital Inputs Read Digital Inputs

(details can be found in the

Write Digital Outputs

Write Digital Outputs Write Digital Outputs

states (details can be found in the

Those states are transmitted over the RF (as configured by RF Mode the corresponding pins o n the remote radi o(s).

TXD (Transmit Data) and RXD (Receive Data) (pins 2 and 3 respectively)

TXD (Transmit Data) and RXD (Receive Data) (pins 2 and 3 respectively)TXD (Transmit Data) and RXD (Receive Data) (pins 2 and 3 respectively)

Hop Frame (pin 6)

Hop Frame (pin 6)Hop Frame (pin 6)

“CC” command is issued to read the state of both GIn pins locally

On-the-Fly Control Command Reference

On-the-Fly Control Command ReferenceOn-the-Fly Control Command Reference

“CC” command is issued to write all GOn pins locally to particular

On-the-Fly Control Command Reference

On-the-Fly Control Command ReferenceOn-the-Fly Control Command Reference

RF Mode) and will be presented to

RF ModeRF Mode

RF Mode) and will be presented to

RF ModeRF Mode

The AC4490 is a frequency hopping spread spectrum radio. Frequency hopping allows the system to hop around interference in order to provide a better wireless link. Hop Frame transitions logic Low at the start of a hop and transitions logic High at the completion of a hop. The OEM Host is not required to monitor Hop Frame.

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5.1.4

5.1.4 CTS Handshaking (pin 7)

5.1.45.1.4

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. CTS On specifies the amount of bytes that must be in the buffer for CTS to be disabled (High). Even while CTS is disabled, the OEM Host can still send data to the transceiver, but it should do so carefully. Once CTS is disabled, it will remain disabled until the buffer is reduced to the size specified by CTS On Hysteresis.

5.1.5

5.1.5 RTS Handshaking (pin 8)

5.1.55.1.5

With RTS Mode the packet is received. However, some OEM Hosts are not able to accept data from the transceiver all of the time. With RTS Mode Enabled, the OEM Host can keep the transceiver from sending it a packet by disabling RTS (logic High). Once RTS is enabled (logic Low), the transceiver can send packets to the OEM Host as they are received. Note: Leaving RTS disabled for too long can cause data loss

once the transceiver’s receive buffer fills up.

once the transceiver’s receive buffer fills up.once the transceiver’s receive buffer fills up.

CTS Handshaking (pin 7)

CTS Handshaking (pin 7)CTS Handshaking (pin 7)

CTS On in conjunction with CTS On Hysteresis

CTS OnCTS On

RTS Handshaking (pin 8)

RTS Handshaking (pin 8)RTS Handshaking (pin 8)

RTS Mode disabled, the transceiver will send any received packet to the OEM Host as soon as

RTS ModeRTS Mode

CTS On Hysteresis control the operation of CTS. CTS On

CTS On HysteresisCTS On Hysteresis

Note: Leaving RTS disabled for too long can cause data loss

Note: Leaving RTS disabled for too long can cause data lossNote: Leaving RTS disabled for too long can cause data loss

5.1.6

5.1.6 9600 Baud/Packet Frame (pin 12)

5.1.65.1.6

9600_BAUD

9600_BAUD – When pulled logic Low before applying power or resetting, the transceiver’s serial

9600_BAUD9600_BAUD interface is forced to a 9600, 8-N-1 (8 data bits, No parity, 1 stop bit) rate. To exit, transceiver must be reset or power-cycled with 9600_Baud logic High.

Packet Frame

Packet Frame – When enabled in EEPROM, Packet Frame will transition logic Low at the start of a

Packet FramePacket Frame received RF packet and transition logic High at the completion of the packet.

5.1.7

5.1.7 RSSI (pin 13)

5.1.75.1.7

Instantaneous RSSI

Instantaneous RSSIInstantaneous RSSI Received Signal Strength Indicator is used by the Host as an indicat ion of instantaneous signal

strength at the receiver. The Host must calibrate RSSI without a RF signal being presented to the receiver. Calibration is accomplished by following th e steps listed below t o find a minimum and maximum voltage value.

9600 Baud/Packet Frame (pin 12)

9600 Baud/Packet Frame (pin 12)9600 Baud/Packet Frame (pin 12)

RSSI (pin 13)

RSSI (pin 13)RSSI (pin 13)

1) Power up only one Client (no Server) transceiver in the coverage area.

2) Measure the RSSI signal to obtain the minimum value w ith no other signal present.

3) Power up a Server. Ma ke sure the two transceivers ar e in close proximity and measure the Client’s peak RSSI once the Client reports In Range to obtain a maximum value at full signal strength.

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Validated RSSI

Validated RSSIValidated RSSI

1.2

0.8

On-the-Fly Control Command Reference

On-the-Fly Control Command ReferenceOn-the-Fly Control Command Reference

Figure

Figure 1111 – RSSI Voltage vs. Received Signal Strength

Figure Figure

Report Last Good RSSI

Report Last Good RSSI Report Last Good RSSI

– RSSI Voltage vs. Received Signal Strength

– RSSI Voltage vs. Received Signal Strength – RSSI Voltage vs. Received Signal Strength

command to request that value (details can

). Validated RSSI is not available at the RSSI

0.6

Voltage (VDC)

0.4

0.2

-105 -100 -95 -90 -85 -80 -75 -70 -65 -60 -55 -50

Signal at Receiver (dBm)

5.1.8

5.1.8 UP_Reset (pin 15)

5.1.85.1.8

UP_Reset provides a direct connection to the reset pin on the AC4490 microprocessor. To guarantee a valid power-up reset, t his pin s hould neve r be t ied Low o n power-up . For a vali d powe r-on rese t, reset must be High for a minimum of 50us.

5.1.9

5.1.9 Command/Data (pin 17)

5.1.95.1.9

When logic High, transceiver interprets Host data as transmit data to be sent to other transceivers and their Hosts. When logic Low, transceiver interprets Host data as command data (see section 4)

UP_Reset (pin 15)

UP_Reset (pin 15)UP_Reset (pin 15)

Command/Data (pin 17)

Command/Data (pin 17)Command/Data (pin 17)

(see section 4).

(see section 4)(see section 4)

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5.1.10

5.1.10 AD In and AD Out (pins 18 and 19 respectively)

5.1.105.1.10

When enabled in EEPROM, AD In and AD Out can be used as a cost savings to replace Analog-toDigital and Digital-to-Analog converter hardware. The following conditions are all possible when enabled in EEPROM. Note: AD Out is an unbuffered, high impedance output and must be buffered the OEM Host when used.

AD In and AD Out (pins 18 and 19 respectively)

AD In and AD Out (pins 18 and 19 respectively)AD In and AD Out (pins 18 and 19 respectively)

1) A refresh rate can be p rogrammed i n EEPROM to c ause a transcei ver to re ad the AD In p ort and send the state of that port over the RF (as configured by RF Mode to the AD Out pin on the remote radio(s).

2) A “CC” command is issued to cause a transceiver to read t he AD In port locally and send th e state of that port over the RF (as configured by RF Mode pin on the remote radio(s).

RF Mode) and will be presented

RF ModeRF Mode

RF Mode) and will be presented to the AD Out

RF ModeRF Mode

must be buffered by

must be bufferedmust be buffered

3) The

4) The

6) A “CC” command is issued to write the AD Out pin on a re mote radio(s) t o a particular st ate.

5.1.11

5.1.11 In Range (pin 20)

5.1.115.1.11

The IN_RANGE pin at the connector will be driven logic Lo w when a Client is in range of a S erver on the same RF Channel IN_RANGE pin logic High and enter a search mode looking for a Server. As soon as it detects a Server, the IN_RANGE pin will be driven logic Low. A Server Host can determine which Clients are in range by the Server’s Host software polling a Client’s Host.

5.2

5.2 SSSS

5.25.2

Below is a description of all soft ware p aramete rs use d to con trol th e AC4490 .

5.2.1

5.2.1 RF Architecture (Unicast/Broadcast)

5.2.15.2.1

Read ADC

Read ADCRead ADC

the

On-the-Fly Control Command Reference

On-the-Fly Control Command ReferenceOn-the-Fly Control Command Reference

Write ADC

Write ADCWrite ADC

can be found in the

This state is transmitted over the RF (as configured by RF Mode AD Out pin on the remote radio(s).

In Range (pin 20)

In Range (pin 20)In Range (pin 20)

RF Channel and System ID

RF ChannelRF Channel

OFTWARE

OFTWARE OFTWARE

RF Architecture (Unicast/Broadcast)

RF Architecture (Unicast/Broadcast)RF Architecture (Unicast/Broadcast)

command is issued to read the state of AD In locally (detai ls can be found in

command is issued to write the AD Out pin to a particular stat e locally (de tails

On-the-Fly Control Command Reference

On-the-Fly Control Command ReferenceOn-the-Fly Control Command Reference

RF Mode) and will be presented to the

RF ModeRF Mode

System ID. If a Client cannot hear a Serve r for 7.5s, it will driv e the

System IDSystem ID

ARAMETERS

PPPP

ARAMETERSARAMETERS

The Server contro ls the syste m timi ng by se nding out re gular b eacon s (trans paren t to t he trans ceiver Host) which contain system timing information. This timing information synchronizes the Client radios to the Server.

Each network should consist of only one Server. There should never be two Servers on the same RF

Channel Number

Channel Number in the same coverage area, as the interference between the two Servers will severely

Channel NumberChannel 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

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Unicast Only can be enabled.

Unicast OnlyUnicast Only

RFRF

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5.2.2

5.2.2 RF Mode

5.2.25.2.2

All radios located on the same network must use the same RF Mode.

All radios located on the same network must use the same RF Mode.All radios located on the same network must use the same RF Mode.

RF Delivery Overview

RF Delivery OverviewRF Delivery Overview All packets are sent out over the RF as either addressed or broadcast packets. Addressed packets are

only received by the radio specified by Destination Address Destination Address should be programmed with the MAC ID EEPROM programming, Auto Destination automatically set its Destination Address to the address of the Server. Broadcast packets are sent out to every eligible transceiver on the network. If broadcast packets are desired, RF Delivery set to Broadcast.

Acknowledge Mode

Acknowledge ModeAcknowledge Mode In Addressed Acknowledge Mode, the RF packet is sent out to the receiver designated by the

Destination Address

Destination Address. Transmit Retries

Destination AddressDestination Address intended receiver. Transparent to the OEM Host, the sending transceiver will send the RF packet to the intended receiver. If the receiver receives the packet free of errors, it will tell the sender. If the sender does not receive this acknowledge, it will assume the packet was never received and retry the packet. This will go on until the packet is successfully received or the transmitter exhausts all of its retries. The received packet will only be sent to the OEM Host if and when it i s recei ved free of errors.

RF Mode

RF ModeRF Mode

Destination Address. If addressed packets are desired, the

Destination Addre ssDestination Addre ss

Auto Destination can be enabled in Clients which allows the Client to

Auto DestinationAuto Destination

Transmit Retries is used to increase the odds of successful delivery to the

Transmit RetriesTransmit Retries

MAC ID of the destination radio. To simplify

MAC IDMAC ID

RF Delivery should be

RF DeliveryRF Delivery

In Broadcast Acknowledge Mode, the RF packet is broadcast out to all eligible receivers on the network. In order to increase the odds of successful delivery, Broadcast Attempts the odds of successful delivery to the intended receiver(s). Transparent to the OEM Host, the sending transceiver will send the RF packet to the intended receiver. If the receiver detects a packet error, it will throw out the packet. This will go on until the packet is successfully received or the transmitter exhausts all of its attempts. Once the receiver successfully receives the packet it will send the packet to the OEM Host. It will throw out any duplicates caused by further Broadcast Attempts. The received packet will only be sent to the OEM Host if it i s recei ved free of errors.

Stream Mode

Stream ModeStream Mode In Broadcast Stream mode, the RF packet is broadcast out to all eligible receivers on the network. In

Addressed Stream Mode, the RF packet is sent out to the receiver designated by the Destination

Address

Address. The sending transceiver will send each RF packet out once. There are no retries on the

AddressAddress packet. Whether or not the packet contains errors, the receiver(s) will send the packet to the OEM Host. However, if receiver is not able to receive the packet in its entirety (there are bytes missing), it will not send the packet to the OEM Host. In order to increase the odds of successful delivery, Forward

Error Correction (FEC)

Error Correction (FEC) may be us ed. FEC is u sed (tran spare nt to t he OEM Host) t o inc rease th e odds

Error Correction (FEC)Error Correction (FEC) of correctly receiving a packet sent over the RF. When enabled, the transceiver will send every byte over the RF 3 times and then perform a best-of-three bit-wise decision on the received bytes. Enabling FEC can cut overall throughput by 1/3. Note: All transceivers on the same network must have the

same setting for FEC. Stream Mode is incompatible with Full Duplex Mode.

same setting for FEC. Stream Mode is incompatible with Full Duplex Mode.same setting for FEC. Stream Mode is incompatible with Full Duplex Mode.

5.2.3

5.2.3 Sub Hop Adjust

5.2.35.2.3

Sub Hop Adjust

Sub Hop AdjustSub Hop Adjust

Note: All transceivers on the same network must have the

Note: All transceivers on the same network must have theNote: All transceivers on the same network must have the

Broadcast Attempts is used to increase

Broadcast AttemptsBroadcast Attempts

Destinat io n

Destinat io nDestinatio n

Forward

ForwardForward

Sub Hop Adjust is an AC4490 protocol parameter and should only be modified at the recommendation of Aerocomm.

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5.2.4

5.2.4 Duplex Mode

5.2.45.2.4

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. This mode restricts Clients to transmitting on odd numbered frequency “bins” and the Server to transmitting on even frequency bins. Though the RF hardware is still technically half duplex, it makes the radio seem full duplex. This can cause overall throughputs to be cut in half. Note: All transceivers on the same network must have the same setting

for Full Duplex. Full Duplex mode is incompatible with Stream RF mode.

for Full Duplex. Full Duplex mode is incompatible with Stream RF mode.for Full Duplex. Full Duplex mode is incompatible with Stream RF mode.

5.2.5

5.2.5 Interface Timeout/RF Packet Size

5.2.55.2.5

Duplex Mode

Duplex ModeDuplex Mode

Interface Timeout/RF Packet Size

Interface Timeout/RF Packet SizeInterface Timeout/RF Packet Size

Note: All transceivers on the same network must have the same setting

Note: All transceivers on the same network must have the same settingNote: All transceivers on the same network must have the same setting

Interface timeout, in conjunction with RF Packet Size over the RF as a complete RF packet based on whichever condition occurs first.

Interface Timeout

Interface Timeout – Interface Timeout specifies a maximum byte gap in between consecutive bytes.

Interface TimeoutInterface Timeout When that byte gap is exceeded, the bytes in the transmit buffer are sent out over the RF as a complete packet. Interface timeout is adjustable in 1ms increments and has a tolerance of ±1ms. Therefore, the Interface Timeout should be set to a minimum of 2. The default value for Interface Timeout is 4 or 4ms.

RF Packet Size

RF Packet Size – When the amount of bytes in the transceiver transmit buffer equals RF Packet Size,

RF Packet Size RF Packet Size those bytes are sent out as a complete RF packet.

5.2.6

5.2.6 Serial Interface Baud Rate

5.2.65.2.6

This two-byte value determines the baud rate used for communicating over the serial interface to a transceiver. Table 5 - Baud Rate/Timeout 1200 baud are not supported. For a baud rate to be valid, the calculated baud rate must be within ±3% of the OEM Host baud rate. If the 9600_BAUD pin (Pin 12) is pulled logic Low at reset, the baud rate

will be forced to 9,600

will be forced to 9,600.

will be forced to 9,600will be forced to 9,600 following equation can be used:

Serial Interface Baud Rate

Serial Interface Baud RateSerial Interface Baud Rate

Table 5 - Baud Rate/Timeout lists values for some common baud rates. Baud rates below

Table 5 - Baud Rate/TimeoutTable 5 - Baud Rate/Timeout

If the 9600 _B AUD pi n (Pi n 12 ) is pu lle d lo gic Low at re set , the ba ud ra te

If the 9600 _B AUD pi n (Pi n 12 ) is pu lle d lo gic Low at re set , the ba ud ra teIf the 9600_ BAUD pi n (Pi n 12 ) is pull ed l ogic L ow at rese t, t he b aud rate

. For Baud Rate values other than those shown in Table 5 - Baud Rate

. .

BAUD = 100h - (14.7456E

BAUD = 100h - (14.7456EBAUD = 100h - (14.7456E

RF Packet Size, determines when a buffer of data will be sent out

RF Packe t Si zeRF Packe t Si ze

Table 5 - Baud Rate, the

Table 5 - Baud RateTable 5 - Baud Rate

+06

+06 +06

/ (64 * desired baud rate))

/ (64 * desired baud rate))/ (64 * desired baud rate))

BaudH= Always 0

BaudH= Always 0BaudH= Always 0

BaudL = Low 8 bits of BA UD (base16)

BaudL = Low 8 bits of BA UD (base16)BaudL = Low 8 bits of BA UD (base16)

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AC4490 Specifications

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Baud

BaudBaud

Rate

RateRate

115,200 FEh 00h 02h

57,600 FCh 00h 02h 38,400 FAh 00h 02h 28,800 F8h 00h 02h 19,200 F4h 00h 02h 14,400 F0h 00h 03h

9,600 E8h 00h 03h

4800 D0h 00h 05h 2400 A0h 00h 09h 1200 40h 00h 11h

5.2.7

5.2.7 Network Topology

5.2.75.2.7

RF Channel Number

RF Channel Number – RF Channel Number provides a physical separation between co-located

RF Channel NumberRF Channel Number 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.” To avoid cross-talk interference, co-located networks should use Sync-to-Channel frequency hop timing to a system located on the RF Channel specified by Sync Channel requirement is that Sync Channel be numerically less than RF Channel. Therefore, every co-located network will be synchronizing to the network with the lowest RF Channel. Four Channel sets are provided for the AC4490. Co-located networks must use the same Channel Set.

Network Topology

Network TopologyNetwork Topology

Sync-to-Channel. A Server radio with Sync-to-Channel enabled will synchronize its

Sync-to-ChannelSync-to-Channel

Table

Table 6666 – Baud Rat e

Table Table

BaudL

BaudLBaudL

Rate

(42h)

(42h)(42h)

Co-located networks must use the same Channel Set.

Co-located networks must use the same Channel Set.Co-located networks must use the same Channel Set.

BaudH

BaudHBaudH

(43h)

(43h)(43h)

– Baud Rate

– Baud Rate – Baud Rate

Minimum Interface Timeout

Minimum Interface TimeoutMinimum Interface Timeout

(58h)

(58h)(58h)

Sync Channel. The only

Sync ChannelSync Channel

Table

Table 7777 – US and International RF Channel Number Settings

Table Table

Channel Set RF Channel Number Range

0 0 – 0Fh 902 – 928MHz (26 hop bins) US/Canada

1 10 – 2Fh 902 – 928MHz (50 hop bins) US/Canada

2 30 – 37h 915 – 928MHz Australia

3 38h 869.4 – 869.5MHz (Up to 500mW at 10%

4 39h 869.7 – 870MHz (Up to 5mW with no duty

System ID

System ID – System ID is similar to a password character or network number and makes network

System IDSystem ID eavesdropping more difficult. A receiving radio will not go in range of or communicate with another radio on a different System ID.

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– US and International RF Channel Number Settings

– US and International RF Channel Number Settings – US and International RF Channel Number Settings

Frequency Details and Regulatory

(40h)

maximum transmit vs. receive duty cyc le)

Requirements

cycle requirement)

Countries

France

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AC4490 Specifications

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5.2.8

5.2.8 Frequency Offset

5.2.85.2.8

Frequency Offset is an AC4490 protocol parameter and should only be modified at the recommendation of Aerocomm.

5.2.9

5.2.9 Auto Config

5.2.95.2.9

Frequency Offset

Frequency OffsetFrequency Offset

Auto Config

Auto ConfigAuto Config

The AC4490 has several variables that c ontrol i ts RF performanc e and v ary by RF Mode

Architecture

Architecture. Enabling Auto Config will bypass the value for these variables stored in EEPROM and use

ArchitectureArchitecture predetermined values for the given Interface Baud Rate. Auto Config has been optimized for 115,200

baud 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 recommendationbaud 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 affec ted by Auto Config and thei r

from AeroComm.from AeroComm. respective values:

Table

Table 8888 – Auto Config Parameters

Table Table

CTS On Hysteresis ACh

– Auto Config Parameters

– Auto Config Parameters – Auto Config Parameters

Parameter Auto Config Value

RF Packet Size 46h

CTS On D2h

Auto Config has been optimized for 115,200

Auto Config has been optimized for 115,200Auto Config has been optimized for 115,200

RF Mode and RF

RF ModeRF Mode

RFRF

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AC4490 Specifications

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5.2.10

5.2.10 Max Power

5.2.105.2.10

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.

Max Power (Address 63h) 100% Transmit Current (mA) Transmit Power Output(dBm)

Max Power

Max PowerMax Power

00h 47 -20 01h 50 -10 02h 50.5 -3 03h 52 1 04h 55 4 05h 58.5 7 06h 63.5 9 07h 69 10.5 08h 76 12 09h 83 13.5 0Ah 90.5 14.5 0Bh 97.5 15.5 0Ch 105 16.5 0Dh 111.5 17

Table

Table 9999 – Max Power Settings

Table Table

– Max Power Settings

– Max Power Settings – Max Power Settings

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AC4490 Specifications

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6. Application Examples

Application Examples

6.6.

Application ExamplesApplication Examples

TBD

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AC4490 Specifications

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7. Dimensions

Dimensions

7.7.

DimensionsDimensions

All AC4490 products measure 1.9”L x 1.65”W. Critical parameters are as follows:

•

J1 – 20 pin OEM interface co nnector (Samtec TMM-110-01-L-D-SM, mates with Samtec

J1J1 SMM-110-02-S-D)

•

MMCX Jack

MMCX Jack – Antenna connector (Telegartner P/N J01341C0081) mates with any

MMCX JackMMCX Jack manufacturer’s MMCX plug

Figure

Figure 2222 - AC4490 Top & Side View

Figure Figure

- AC4490 Top & Side View

- AC4490 Top & Side View - AC4490 Top & Side View

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Ordering Information

Ordering Information Ordering Information

8. Ordering Information

Ordering Information

8.8.

Ordering InformationOrdering Information

RODUCT

8.1

8.1 PPPP

8.18.1

RODUCT

RODUCT RODUCT

PPPP

ART

ART ART

UMBER

NNNN

UMBER UMBER

TTTT

REE

REEREE

RODUCT

8.2

8.2 PPPP

8.28.2

Order transceivers u sing t he fo llowing part n umber ta bles:

AC4490C-100A-3 AC4490I-100A-3 AC4490C-100A-5 A C4490I-100A-5 AC4490C-100M-3 AC4490I-100M-3 AC4490C-100M-5 AC4490I-100M-5

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RODUCT

RODUCT RODUCT

3.3V, 100 mW Part Numbers 4.5 – 5.5V, 100 mW Part Numbers

ART

UMBERS

PPPP

UMBERS

NNNN

ART ART

UMBERSUMBERS

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Ordering Information

Ordering Information Ordering Information

EVELOPER

8.3

8.3 DDDD

8.38.3

Order Developer Kits usin g the follo wing part nu mber table s:

SDK-AC4490I-100A-5 SDK-AC4490I-100M-5

All Developer Kits include (2) transceivers, (2) RS232 Serial Adapter Boards, (2) 6Vdc unregulated power supplies, (2) Serial cables, (2) S467FL-6-RMM-915S dipole antennas with 6” pigtail and MMCX connector, configuration/testing software, and integration engineering support.

EVELOPER

EVELOPER EVELOPER

4.5 – 5.5V, 200 mW Developer Kit Part Numbers

KKKK

ART

UMBERS

ART ART

UMBERS

NNNN

UMBERSUMBERS

IT IT

PPPP

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