Product category: Communications ICs (Wired)
News Release from: CML Microcircuits | Subject: DE70321 marine AIS class-B demonstrator
Edited by the Electronicstalk Editorial Team on 31 January 2008
Demonstrator speeds transponder development
The DE70321 is a complete AIS Class B (IEC 62287) technology demonstrator aimed at speeding manufacturers' design and development of Marine AIS Class B transponders and AIS receiver products
CML Microcircuits has released a marine AIS (automatic identification system) Class-B demonstrator. The DE70321 is a complete AIS Class B (IEC 62287) technology demonstrator aimed at speeding manufacturers' design and development of Marine AIS Class B transponders and AIS receiver products. Using CML's CMX7032 AIS Class B baseband processor with RF synthesiser IC, the design is a flexible platform using CML's proprietary FirmASIC component technology, which configures the on-chip sub-systems of the CMX7032 via a function image.
This article was originally published on Electronicstalk on 31 January 2008 at 8.00am (UK)
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A function image is a data file that is uploaded during device initialisation and configures the device's function and feature set, allowing users to configure and evaluate with two build options: the Class B Transceiver (using CMX7032 FI-1.x) and the Dual Channel Rx-only (using CMX7032 FI-2.x).
The FI-1.x function image allows full host control over all CMX7032 functions and the FI-2.x automatically programs the CMX7032 RF synthesisers to the correct frequencies.
The default board configuration is designed for dual channels receiving 161.975MHz (AIS channel 1) and 162.025MHz (AIS channel 2) with 25kHz channel spacing and 9600bps over-air data rate.
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An EEPROM is included which can automatically load the FI-2.x function image into the CMX7032 at power-up.
Received data is automatically provided as NMEA 0183-HS sentences at 38,400bit/s from the DB9 RS232 port.
All necessary RF circuits, such as VCOs, a 2W PA, harmonic filter, antenna switching and LNA, are provided on the DE70321 to facilitate easy evaluation and demonstration of the design as a Class B unit.
A C-BUS interface is provided for control of the CMX7032 by a host microcontroller (required to perform the higher level protocol functions on a Class B implementation).
The design is production engineered for low cost, with the minimum number of component types.
CML's highly integrated baseband signalling processors fulfil the requirements of all marine AIS transponders, AIS Rx-only units and aids to navigation systems, on both large and small vessels.
Operating from a single 3.3V supply, the CMX7032 is available in either a 64-pin VQFN or a 64-pin LQFP package.
The CMX7042 is available in a 48-pin VQFN or 48-pin LQFP package.
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