AC4424 2.4 GHz OEM TRANSCEIVERS Specifications Subject to Change User’s Manual Version 1.5 10981 EICHER DRIVE LENEXA, KS 66219 (800) 492492-2320 www.aerocomm.com wireless@aerocomm.com wireless@a erocomm.
DOCUMENT INFORMATION Copyright Information Copyright © 2002 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.
DOCUMENT INFORMATION Revision Description Version 1.0 Version 1.1 Version 1.2 Version 1.3 Version 1.4 Version 1.5 11/7/2001 – Initial Release Version 10/14/2002 – Not Released 10/18/2002 – Full release of AC4424 specification 11/19/2002 – Made Full-Duplex incompatible with Stream Mode 12/09/2002 – Changed Sub Hop Adjust setting recommendations 1/30/2003 – Removed all references to Commercial and Industrial temperature. All products are now Industrial temperature. Changed Section 4.2.
FCC INFORMATION Agency Approval Approval Overview Part Number AC4424-10 AC4424-100 AC4424-200 US/FCC X X X CAN/IC X X X EUR/EN X X Portable X Mobile X X-32cm* X-32cm* Fixed X X-32cm* X-32cm* * See RF Exposure warning on next page Note: The product approvals above are with antennas specified below.
FCC INFORMATION 2 S191FL-5-RMM-2450S Type 1/4 Wave Dipole Gain (dBi) 2 Nearson 5/8 Wave Dipole 3 AC4424X AC4424X--200 Mfg.
FCC INFORMATION RF Exposure AC4424AC4424-10 WARNING: To comply with FCC RF Exposure requirements, the Original Equipment Manufacturer (OEM) must ensure that Antennas 3, 4, 5, 6 and 7 in the previous table must be installed and/or configured to operate with a separation distance of 20cm or more from all persons to satisfy RF Exposure compliance.
TABLE OF CONTENTS 1. OVERVIEW................................ OVERVIEW................................................................ ................................................................................................ ........................................................................................ ........................................................9 ........................9 2. AC4424 SPECIFICATIONS SPECIFICATIONS ...............................................................
5.2.5 5.2.6 5.2.7 5.2.8 Interface Timeout/RF Packet Size................................................................................ 27 Serial Interface Baud Rate ........................................................................................... 28 Network Topology ....................................................................................................... 28 Auto Config .................................................................................................................
AC4424 Specifications AC4424 Features Simple 5V TTL level serial interface for fast integration Frequency Hopping Spread Spectrum for security and interference rejection Cost Efficient for high volume applications Low power consumption for battery powered implementations Small size for portable and enclosed applications Very Low latency and high throughput Industrial temperature (-40°C to 80°C) 1. Overview The AC4424 is a member of AeroComm’s ConnexRF OEM transceiver family.
AC4424 Specifications 2.
AC4424 Specifications 3. Specifications 3.1 INTERFACE SIGNAL DEFINITIONS The AC4424 has a simple interface that allows OEM Host communications with the transceiver. Table 1 – Pin Definitions, Definitions shows the connector pin numbers and associated functions. The I/O direction is with regard to the transceiver. All I/O is 5VDC TTL level signals except for RSSI. All inputs are weakly pulled High and may be left floating during normal operation.
AC4424 Specifications 3.2 ELECTRICAL SPECIFICATIONS Table 2 – DC Input Voltage Characteristics Pin 3 8 12 14 15 17 Type I I I I I I Name RXD RTS 9600_Baud WR_ENA UP_RESET Command/Data High Min. 0.2Vcc+0.9 0.2Vcc+0.9 0.2Vcc+0.9 0.7Vcc 0.7Vcc 0.2Vcc+0.9 High Max. Vcc+0.5 Vcc+0.5 Vcc+0.5 Vcc+1 Vcc+0.5 Vcc+0.5 Low Min. -0.5 -0.5 -0.5 -0.3 -0.5 -0.5 Low Max. 0.2Vcc-0.1 0.2Vcc-0.1 0.2Vcc-0.1 0.5 0.2Vcc-0.1 0.2Vcc-0.
AC4424 Specifications Table 4 – Maximum Overall System Throughputs RF Mode Interface Baud Rate Duplex FEC Direction Throughput (bps) Stream 192k Half Disabled One way 192k Stream 192k Half Enabled One way 64k Acknowledge 115,200 Half Disabled One way 80k Acknowledge 115,200 Full Disabled Both ways 40k 12/09/02 13
AC4424 Specifications 4. Configuring the AC4424 4.1 EEPROM PARAMETERS A Host can program various parameters that are stored in EEPROM and become active after a poweron reset. Table 5 - EEPROM Parameters, 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 addresses other than those listed below. Do not copy a transceiver’s transceiver’s EEPROM data to another transceiver.
AC4424 Specifications Parameter Frequency Offset Transmit Retries Broadcast Attempts API Control Interface Timeout Sync Channel RF Packet Size CTS On CTS On Hysteresis Destination ID System ID MAC ID EEPROM Length Address (Bytes) Range Default 46H 1 00h, 2Eh 00h 4CH 1 01 - FFh 10h 4DH 56H 1 1 01 – FFh 58H 5AH 5BH 5CH 1 1 1 1 01 – FFh 00 – 3Fh 01 – 40h 01 – FFh F0h 01h 40h C0h 5DH 70H 76H 80H 1 6 1 6 01 – FFh 80h 6 Bytes 01h 6 Bytes 00 – FFh Description Channel Set 0 = N/A Channel
AC4424 Specifications 4.2.1 EEPROM Byte Read Upon receiving this command, a transceiver will transmit the desired data from the address requested by the Host. Host Command: Byte 1 = C0h Byte 2 = Address Byte 3 = Length (01…FFh = 1…255 bytes; 00h = 256 bytes) Transceiver Response: Byte 1 = C0h Byte 2 = Address Byte 3 = Length Byte 4…n = Data at requested address(s) 4.2.
AC4424 Specifications 4.3 ON-THE-FLY CONTROL COMMAND REFERENCE The AC4424 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.
AC4424 Specifications 4.3.3 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.
AC4424 Specifications 4.3.5 PowerPower-Down WakeWake-Up Command The Power-Down Wake-Up Command is issued by the Host to bring the transceiver out of powerdown mode. Host Command: Byte 1 = CCh Byte 2 = 07h Transceiver Response: Byte 1 = CCh Byte 2 = 00h 4.3.6 Broadcast Mode The Host issues this command to change the transceiver operation between Addressed Mode and Mode.
AC4424 Specifications 4.3.8 Write Static Bank #1 Bytes The Host issues this command to the transceiver to write Static Bank #1 Bytes. Static Bank #1 is a bank of memory that holds many of the parameters that control the radio. Using the Read/Write Static Bank #1 command allows these parameters to be changed dynamically. Because the memory bank is static, when the radio is reset, these parameters will revert back to the settings stored in EEPROM.
AC4424 Specifications 4.3.10 Write Static Bank #2 Bytes The Host issues this command to the transceiver to write Static Bank #2 Bytes. Static Bank #2 is a bank of memory that holds many of the parameters that control the radio. Using the Read/Write Static Bank #2 command allows these parameters to be changed dynamically. Because the memory bank is static, when the radio is reset, these parameters will revert back to the settings stored in EEPROM.
AC4424 Specifications 4.3.13 Temperature Update The Host issues this command to update the transceiver with the ambient temperature. This command is only valid on AC4424 family transceivers not already fitted with a temperature sensor.
AC4424 Specifications 5. Theory of Operation 5.1 HARDWARE INTERFACE Below is a description of all hardware pins used to control the AC4424. 5.1.1 TXD (Transmit Data) and RXD (Receive Data) (pins 2 and 3 respectively) The AC4424 accepts 5V TTL level asynchronous serial data in 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.
AC4424 Specifications 5.1.5 9600 Baud/Packet Baud/Packet Frame (pin 12) 9600_BAUD – When pulled logic Low before applying power or resetting, the transceiver’s serial 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 – When enabled in EEPROM, Packet Frame will transition logic Low at the start of a received RF packet and transition logic High at the completion of the packet. 5.1.
AC4424 Specifications 5.1.7 Wr_Ena Wr_Ena (EEPROM Write Enable) (pin 14) Wr_Ena is a direct connection to the Write Enable line on the EEPROM. When logic Low, the EEPROM’s contents may be changed. When logic High, the EEPROM is protected from accidental and intentional modification. It is recommended that this line only be Low when an EEPROM write is desired to prevent unintentional corruption of the EEPROM. 5.1.
AC4424 Specifications 5.2.2 RF Mode All radios located on the same network must use the same RF Mode. Acknowledge Mode In Addressed Acknowledge Mode, the RF packet is sent out to the receiver designated by the Destination Address. Address Transmit Retries is used to increase the odds of successful delivery to the intended receiver. Transparent to the OEM Host, the sending transceiver will send the RF packet to the intended receiver.
AC4424 Specifications 5.2.3 Sub Hop Adjust Sub Hop Adjust is an AC4424 protocol parameter and its settings are as follows: Table 7 – Sub Hop Adjust Settings RF Mode Sub Hop Adjust Acknowledge D0h Stream 80h 5.2.4 Duplex Mode In Half Duplex mode, the AC4424 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.
AC4424 Specifications 5.2.6 Serial Interface Baud Rate This two-byte value determines the baud rate used for communicating over the serial interface to a transceiver. Table 5 - Baud Rate/Timeout lists values for some common baud rates. Baud rates below 110 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. 9,600.
AC4424 Specifications Table 9 – US and International RF Channel Number Settings Channel Set RF Channel Number Range Frequency Offset (40h) (46h) Countries 0 00h – 0Fh N/A US,Canada 1 10h – 1Fh 0 US,Canada 2 20h – 2Fh 0 US,Canada 3 30h – 3Fh 2Eh France System ID – System ID is similar to a password character or network number and makes network eavesdropping more difficult. A receiving radio will not go in range of or communicate with another radio on a different System ID. 5.2.
AC4424 Specifications 6.
AC4424 Specifications 7. Dimensions All AC4424 products measure 1.65”W x 2.65”L.
Ordering Information 8. Ordering Information 8.1 PRODUCT PART NUMBERS AC4424AC4424-10: 10 AC4424 with 10mW output power, interface data rates to 288Kbps, MMCX antenna connector, -40°C to 80°C AC4424AC4424-100: 100 AC4424 with 50mW output power, interface data rates to 288Kbps, MMCX antenna connector, -40°C to 80°C AC4424AC4424-200: 200 AC4424 with 200mW output power, interface data rates to 288Kbps, MMCX antenna connector, -40°C to 80°C 8.
