Related Manuals for Laird AC4490
Summary of Contents for Laird AC4490
- Page 1 AC4490 Hardware Integration Guide Version 4.6 Americas: +1-800-492-2320 Europe: +44-1628-858-940 Hong Kong: +852-2923-0610 wireless.support@lairdtech.com www.lairdtech.com/ramp...
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Page 2: Fcc Notice
The preceding statement must be included as a CAUTION statement in manuals for OEM products to alert users on FCC RF Exposure compliance. Caution: Any change or modification not expressly approved by Laird could void the user’s authority to operate the equipment. Embedded Wireless Solutions Support Center: Americas: +1-800-492-2320 http://ews-support.lairdtech.com... -
Page 3: Table Of Contents
Spread Spectrum History ......................... 18 How Spread Spectrum Works ........................18 Frequency Hopping Spread Spectrum ...................... 18 AC4490 Security Features ........................19 AC4490 Mechanical and Layout ....................... 20 Mechanical Drawings ..........................20 AC4490 Timing Diagrams .......................... 23 Ordering Information ..........................24 Product Part Number Tree ........................ - Page 4 Switching Power Supply .......................... 28 PCB Layout ............................... 29 Appendix III: Product Throughput ......................30 Related Documents and Files ........................31 Embedded Wireless Solutions Support Center: Americas: +1-800-492-2320 http://ews-support.lairdtech.com Europe: +44-1628-858-940 www.lairdtech.com/ramp © Copyright 2016 Laird. All Rights Reserved Hong Kong: +852 2923 0610...
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Page 5: Ac4490 Rf Transceiver
AC4490 RF T RANSCEIVER The compact AC4490 900 MHz transceiver can replace miles of cable in harsh industrial environments. Using field-proven frequency hopping spread spectrum (FHSS) technology which needs no additional FCC licensing in the Americas, OEMs can easily make existing systems wireless with little or no RF expertise. - Page 6 20 Pin Interface Connector Molex 87759-0030, mates with Samtec SMM-110-02-S-D RF Connector MMCX jack Johnson Components 135-3711-822 AC4490-1x1: Customer must provide AC4490-200: External antenna with MMCX plug or integral antenna Antenna AC4490-1000: External antenna with MMCX plug 3.3V TTL Serial Interface and I/O...
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Page 7: Electrical Specifications
0.99 2.31 0.99 2.31 0.99 Test 2.31 0.99 2.31 0.99 UP_RESET CMD /Data 2.31 0.99 AD In Embedded Wireless Solutions Support Center: Americas: +1-800-492-2320 http://ews-support.lairdtech.com Europe: +44-1628-858-940 www.lairdtech.com/ramp © Copyright 2016 Laird. All Rights Reserved Hong Kong: +852 2923 0610... - Page 8 DA_Out is an unbuffered, high impedance output and must be buffered by the OEM Host when used. Embedded Wireless Solutions Support Center: Americas: +1-800-492-2320 http://ews-support.lairdtech.com Europe: +44-1628-858-940 www.lairdtech.com/ramp © Copyright 2016 Laird. All Rights Reserved Hong Kong: +852 2923 0610...
- Page 9 AC4490 Hardware Integration Guide Figure 1: Pending RF Buffer Flow Embedded Wireless Solutions Support Center: Americas: +1-800-492-2320 http://ews-support.lairdtech.com Europe: +44-1628-858-940 www.lairdtech.com/ramp © Copyright 2016 Laird. All Rights Reserved Hong Kong: +852 2923 0610...
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Page 10: Hardware
AC4490 Hardware Integration Guide ARDWARE Pin Definitions The AC4490 has a simple interface that allows OEM host communications with the transceiver and shows the connector pin numbers and associated functions. Table 4: AC4490 Pin Definitions Module Type Signal Name Function Generic Output pin Serial data output from the module to the OEM Host. - Page 11 If used, requires a series 1 k resistor at pin 20 followed by a shunt 0.1 μF capacitor. Notes: All I/O is 3.3 V TTL with exception of 5 V inputs on AC4490-200. All inputs are weakly pulled High (10 k) and may be left floating during normal operation.
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Page 12: Pin Descriptions
The AC4490-1000 and AC4490-1x1 transceivers only accept 3.3 V level signals. The AC4490 has an interface buffer size of 256 bytes. If the buffer fills up and more bytes are sent to the transceiver before the buffer can be emptied, data loss occurs. The transceiver prevents this loss by asserting CTS High as the buffer fills up and asserting CTS Low as the buffer is emptied. -
Page 13: Rssi
Complete API commands and from the Probe command. Validated RSSI is not available at the RSSI pin. UP_Reset UP_Reset provides a direct connection to the reset pin on the AC4490 microprocessor and is used to force a soft reset. Embedded Wireless Solutions Support Center: Americas: +1-800-492-2320 http://ews-support.lairdtech.com... -
Page 14: Cmd /Data
Refer to the following sections to ensure that the OEM host data rate matches the serial interface baud rate. Serial Communications The AC4490 is a TTL device which may connect to a compatible UART (Universal Asynchronous Receiver Transmitter) or level translator to connect to serial devices. The UART mainly transmits or receives serial data. -
Page 15: Serial Interface Baud Rate
Timeout (0x58) (0x3F) 115200 0xFE 0x00 0x02 0xFF 57600 0xFC 0x00 0x02 0x03 38400 0xFA 0x00 0x02 0x08 Embedded Wireless Solutions Support Center: Americas: +1-800-492-2320 http://ews-support.lairdtech.com Europe: +44-1628-858-940 www.lairdtech.com/ramp © Copyright 2016 Laird. All Rights Reserved Hong Kong: +852 2923 0610... -
Page 16: Oem Host Data Rate
Flow control refers to the control of data flow between transceivers. It is the method used to handle data in the transmit/receive buffer and determines how data flow between the transceivers is started and stopped. Embedded Wireless Solutions Support Center: Americas: +1-800-492-2320 http://ews-support.lairdtech.com Europe: +44-1628-858-940 www.lairdtech.com/ramp © Copyright 2016 Laird. All Rights Reserved Hong Kong: +852 2923 0610... - Page 17 CTS. Embedded Wireless Solutions Support Center: Americas: +1-800-492-2320 http://ews-support.lairdtech.com Europe: +44-1628-858-940 www.lairdtech.com/ramp © Copyright 2016 Laird. All Rights Reserved Hong Kong: +852 2923 0610...
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Page 18: Security
The AC4490 product family utilizes a Frequency Hopping Spread Spectrum (FHSS) technology which provides the foundation for secure digital wireless communications. This section describes how spread spectrum technology works and explains how an OEM can enable specific security features available in the AC4490. Spread Spectrum History Spread Spectrum dates back to World War II when a German scientist was granted a patent on a simple frequency hopping continuous wave (CW) system. -
Page 19: Ac4490 Security Features
As mentioned at the beginning of this section, the AC4490 uses FHSS technology. In addition, Laird has implemented three levels of security in the AC4490. All three levels of security are associated with their own EEPROM parameter that can programmed for permanent operation or be changed during system operation in volatile memory. -
Page 20: Ac4490 Mechanical And Layout
20 pin OEM Interface connector (Molex 87759-0030, mates with Samtec SMM-110-02-S-D Connector MMCX Jack 20 pin OEM Interface connector (Molex 87759-0030, mates with Samtec SMM-110-02-S-D Figure 5: AC4490 (with MMCX connector) Mechanical Embedded Wireless Solutions Support Center: Americas: +1-800-492-2320 http://ews-support.lairdtech.com Europe: +44-1628-858-940 www.lairdtech.com/ramp... - Page 21 AC4490 Hardware Integration Guide Figure 6: AC4490 - 1x1 Mechanical Embedded Wireless Solutions Support Center: Americas: +1-800-492-2320 http://ews-support.lairdtech.com Europe: +44-1628-858-940 www.lairdtech.com/ramp © Copyright 2016 Laird. All Rights Reserved Hong Kong: +852 2923 0610...
- Page 22 AC4490 Hardware Integration Guide Figure 7: AC4490 1x1 PCB Considerations Embedded Wireless Solutions Support Center: Americas: +1-800-492-2320 http://ews-support.lairdtech.com Europe: +44-1628-858-940 www.lairdtech.com/ramp © Copyright 2016 Laird. All Rights Reserved Hong Kong: +852 2923 0610...
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Page 23: Ac4490 Timing Diagrams
Figure 9: Addressed Mode with Fixed Packet Length Figure 10: Broadcast Mode with Timeout Figure 11: Broadcast Mode with Fixed Packet Length Embedded Wireless Solutions Support Center: Americas: +1-800-492-2320 http://ews-support.lairdtech.com Europe: +44-1628-858-940 www.lairdtech.com/ramp © Copyright 2016 Laird. All Rights Reserved Hong Kong: +852 2923 0610... -
Page 24: Ordering Information
AC4490- 1x1 Due to the RF antenna trace residing on the OEM Host PCB, the FCC will not grant modular approval for the AC4490-1x1 and requires the OEM to submit their completed design for approval. Contact Laird for the approval procedure. -
Page 25: Approved Antenna List
2268C-AC44901000 Approved Antenna List The following antennas are approved for use with the AC4490 as identified. The OEM may choose another vendor’s antenna of like type and equal or lesser gain as a listed antenna and still maintain compliance. Table 8: AC4490 Approved Antennas... -
Page 26: Oem Equipment Labeling Requirements
WARNING: The OEM must ensure that FCC labeling requirements are met. This includes a clearly visible label on the outside of the OEM enclosure specifying the appropriate Laird FCC identifier for this product as well as the FCC notice below. The FCC identifiers are listed above. -
Page 27: Appendix I: 5V To 3.3V Levels
All inputs on the AC4490-200 & AC4490-1000 are weakly pulled High via 10 kohm resistors. The AC4490- 200 has 5 V inputs while the AC4490-1000 & AC4490-1x1 have 3.3 V inputs. The AC4490-200 uses an octal buffer to drop the 5 V to the required 3.3 V level; the -1000 and -1x1 leave this to the OEM. -
Page 28: Appendix Ii: Sample Power Supply
OWER UPPLY Below is a simple switching power supply that provides enough current to easily power any Laird OEM module. It utilizes low cost, off-the-shelf components that fit into a small area. This supply has an input voltage range of +6 volts to +18 volts and will output +3.4 volts at 1.5 amps. -
Page 29: Pcb Layout
AC4490 Hardware Integration Guide PCB Layout Figure 15: PCB Layout Figure 16: PCB Layout Embedded Wireless Solutions Support Center: Americas: +1-800-492-2320 http://ews-support.lairdtech.com Europe: +44-1628-858-940 www.lairdtech.com/ramp © Copyright 2016 Laird. All Rights Reserved Hong Kong: +852 2923 0610... -
Page 30: Appendix Iii: Product Throughput
Module Module Approvals None; FCC / IC FCC / IC needs OEM end approval Integrated Antenna Available Embedded Wireless Solutions Support Center: Americas: +1-800-492-2320 http://ews-support.lairdtech.com Europe: +44-1628-858-940 www.lairdtech.com/ramp © Copyright 2016 Laird. All Rights Reserved Hong Kong: +852 2923 0610... -
Page 31: Related Documents And Files
AC4490 Hardware Integration Guide ELATED OCUMENTS AND ILES The following additional AC4490 technical documents are also available from the RAMP page under the Product Information tab in the row labelled AC4490 - 900MHz Radio Module: Product Brief AC4490 User Manual ... - Page 32 Copyright © 2014 Laird Technologies, Inc. All rights reserved. The information contained in this manual and the accompanying software programs are copyrighted and all rights are reserved by Laird Technologies, Inc. Laird Technologies, Inc. reserves the right to make periodic modifications of this product without obligation to notify any person or entity of such revision.