Semiconductors provider CML Microcircuits has released a DMR (Digital Mobile Radio) chipset solution for the two-radio standard. The DMR chipset comprises a low power RF Direct Conversion Receiver (DCRx) IC (CMX994A) and a PMR Common Platform Processor (CMX7341) with the DMR air interface and coding embedded within a Function Image.
The CMX994A and CMX7341 chipset along with DMR (7241/7341FI-2.x) Function Image enables a highly integrated radio to be developed quickly, cost effectively and providing a low risk development route for radio manufacturers planning to enter the DMR market space.
The DMR Function Image
The 7241/7341FI-2.x Function Image implements much of the DMR air interface protocol including the physical layer 1 and data link layer 2 and is compliant with the ETSI TS 102 361 DMR standard.
A high level of advanced functionality is included that minimises both host interactions and host real-time control constraints. The CMX7341 includes an embedded audio codec (ADC/DAC) with a flexible interface to support both software and hardware implementations of the AMBE+2 Vocoder.
The RF Receiver IC
The CMX994A is CML’s new Direct Conversion Receiver IC. The device PowerTrade feature provides a flexible power control facility to optimise current consumption in normal and stand-by operating modes. CMX994A connects directly to the CMX7341 PMR Common Platform Processor with the DMR Function Image automatically setting up and managing the RF section.
The DMR Chipset ICs are available in very small VQFN packages occupying a minimal PCB footprint and in conjunction with a suitable host microcontroller a small, highly integrated DMR radio can be realised.
The CMX7241/CMX7341 PMR Common Platform Processor can deliver FDMA digital PMR/LMR, 2-slot TDMA digital PMR/LMR and legacy analogue. Based on CML's proprietary component technology, a Function Image can be uploaded into the device to determine the overall functions and operating characteristics.