CMX7042L4 CML Microcircuits

CMX7032 CML Microcircuits CMX7042 COMMUNICATION SEMICONDUCTORS AIS Data Processor D/7032/42 FI1.2/15 March 2018 Provisional Issue DATASHEET Marine AIS data processor designed for Limiter-Discriminator based RF systems Features: Half-Duplex GMSK and FSK Modem Low-Power (3.0V to 3.6V) Operation AIS and DSC Data Format Limiter-Discriminator Rx Interface Optimum Co-channel and Adjacent-channel Flexible Tx Interface: I/Q or Two-point Performance Modulation Flexible Channel Configuration: Auxiliary ADC and DAC Functions Two Simultaneous Rx 4 x (10-bit) DACs One Tx 2 x (10-bit) ADCs Support for: Self Organising Time Division Multiple Access (SOTDMA) Carrier-Sensing Channel Access (CSTDMA) Applications: Operation Low Profile 64 or 48 pad Leadless VQFN and Automatic Identification System (AIS) 64 or 48 pin LQFP Packages for Marine Safety Configurable by Function Image AIS Aids-To-Navigation (AtoN) Two RF Synthesisers (CMX7032 only) AIS Class A and B Transponders Two Auxiliary System Clock Generators AIS Rx-only or Tx-only Modules Tx Section Tx: HDLC Output GMSK Message NRZI I/Q or Drivers Encoder Buffer 2-point Encoder C-BUS Interface Rx Section HDLC GMSK Message NRZI Rx1: Decoder Buffer Decoder Limiter- Host Sample Discriminator Micro Timer FSK Mesage Decoder Buffer Rx2: Interrupt Limiter- HDLC Generator Discriminator GMSK Mesage NRZI Decoder Buffer Decoder Reset and Power TCXO control DACs AIS ADCs Radio Tranceiver GPIO CMX7032 CMX7042 Dual Clock Generators Auxiliary Dual RF Synthesisers Section (CMX7032 only) 2018 CML Microsystems Plc AIS Baseband IC with/without RF Synthesiser CMX7032/CMX7042 1 Brief Description The highly-integrated Baseband Signalling Processor ICs CMX7032 and CMX7042 fulfil the requirements of the Class A and Class B Marine Automatic Identification System (AIS) transponder market. The CMX7042 is identical in functionality to the CMX7032 with the exception that the two on-chip RF Synthesisers have been deleted, which enables it to be supplied in a smaller package. This document refers to both parts generically as the CMX7032/CMX7042, unless otherwise stated. The AIS system allows ships and base stations to communicate their position and other data to each other without the need for a centralised controller. This allows vessels to see each other and take appropriate action to avoid collision and so improve marine safety. The system uses a GMSK 9600 baud data link in the Marine VHF radio band. The system requirements are defined in ITU-R M.1371-4. The two channel access mechanisms used by AIS (Self Organising Time Division Multiple Access (SOTDMA) and Carrier-Sensing Time Division Multiple Access (CSTDMA)) are both supported by the CMX7032/CMX7042. Further information is given in section 6.2. The CMX7032/CMX7042 devices utilise CMLs proprietary FirmASIC component technology. On-chip sub-systems are configured by a Function Image: this is a data file that is uploaded during device initialization which defines the device s function and feature set. The Function Image can be loaded automatically from an external serial memory or from a host Controller over the built-in C-BUS serial interface. The device s functions and features can be enhanced by subsequent Function Image releases, facilitating in-the-field upgrades. The CMX7032/CMX7042, when used with 7032/7042FI-1.x, is half duplex in operation, comprising two parallel Limiter-Discriminator Rx paths and one I/Q or two-point modulation Tx path. The Rx paths are configurable for AIS or DSC operation, the Tx for AIS only. The device performs signal modulation/demodulation with associated AIS functions, such as training sequence detection, NRZI conversion and HDLC processing (flags, bit stuffing/de-stuffing, CRC generate/check). Integrated Rx/Tx data buffers are also provided. This greatly reduces the processing requirements of the host C. Provision of a number of auxiliary ADCs and DACs further simplifies the system hardware design, reducing the overall equipment cost and size. This document refers specifically to the features provided by the CMX7032/CMX7042 Function Image FI-1.2. This Datasheet is the first part of a two-part document comprising Datasheet and User Manual: the User Manual can be obtained by registering your interest in this product with your local CML representative. 2018 CML Microsystems Plc 2 D/7032/42 FI1.2/15