Product category:
Communications ICs (Wired)
News Release from: CML Microcircuits | Subject: CMX7032
Edited by the Electronicstalk Editorial
Team on 10 December 2007
Automatic identification system
processor updated
Latest market driven release offers manufacturers of marine AIS receiver devices dual-channel receive-only functionality.
CML Microcircuits has added further functionality to its CMX7032 marine AIS (automatic identification system) processor to address growing market requirements The CMX7032 uses CML's proprietary FirmASIC component technology, which configures on-chip subsystems via a Function Image; this is a data file that is uploaded during device initialisation configuring the device's function and feature set
This article was originally published on Electronicstalk on 25 Sep 2006 at 8.00am (UK)
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Function Image FI-2.0 is the latest market driven release, offering manufacturers of marine AIS receiver devices dual-channel receive-only functionality for the CMX7032.
The Function Image can be loaded automatically from an optional external EEPROM or from a host microcontroller over the built-in C-Bus serial interface, facilitating in-the-field upgrades.
The CMX7032 includes two onboard auxiliary RF synthesisers along with two parallel limiter-discriminator receiver paths and an RS232-style NMEA 0183-HS compatible output (38,400baud).
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The device performs signal demodulation with associated AIS functions, such as training sequence detection, NRZI conversion and HDLC processing (flags, bit destuffing, CRC check).
Integrated receive data buffers are also provided which removes the need for a host IC.
Provision of a number of user-programmable areas in the Function Image allows the RF synthesisers of the CMX7032 to be programmed directly, which simplifies the system hardware design, reducing the overall equipment cost and size, which are major market drivers.
Auxiliary DAC and ADC functions are provided to further simplify system hardware design and an allowance is made in the RS232 interface for an external GPS device to be connected to reduce the proliferation of interface connections in the final product design.
To fully evaluate the CMX7032 and CML's CMX7042 AIS processor (which excludes RF circuitry), CML offers the DE70321 - a complete AIS Class B (IEC62287) technology demonstrator aimed at speeding-up manufacturers' design and development of AIS Class B transponders and AIS receiver products, using the CMX7032 and CMX7042 ICs.
The DE70321 offers a flexible platform to allow users to configure and evaluate with ease.
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.
The provision of a C-Bus interface is made, 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 a minimum number of component types and values.
CML's highly integrated baseband signalling processors fulfil the requirements of all marine AIS transponders, AIS receive-only units and Aton (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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