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RF Narrowband Wireless Data Products CMX7163 QAM Modem The CMX7163 low power QAM Modem is a half-duplex device supporting multiple channel spacings under host microcontroller (μC) control. Its Function Image™ (FI) is loaded to initialise the device and determine modulation types. The 7163FI-4.x supports 4-, 16- and 64-QAM modulations up to 96kbps in a 25kHz channel, with channel estimation and equalisation to provide robust performance under realistic channel conditions. Flexible bit rates support a wide range of applications requiring a selectable bit rate and robustness. Forward error correction and raw modes are available and support user-defined packet structures to support a range of applications. For greater flexibility, different rate FEC modes are provided. Receive signal quality measurement is supported, making a useful assessment of link conditions. High performance digital IF filters may be reconfigured to support multiple channel spacings via host command. This feature may eliminate the need to switch between multiple discrete IF filters. An integrated analogue interface supports ‘direct connection’ to zero IF I/Q radio transceivers with few external components; no external codecs are required. Intelligent auxiliary ADC, DAC and GPIO subsystems perform valuable functions and minimise host interaction and host I/O resources. Two synthesised system clock generators develop clock signals for off-chip use. A C-BUS/SPI master interface expands host C-BUS/SPI ports to control external devices. The device utilises CML’s proprietary FirmASIC® component technology. On-chip sub-systems are configured by a Function Image™ data file that is uploaded during device initialisation and defines the device’s function and feature set. The Function Image™ can be loaded automatically from a host μC over the C-BUS serial interface or from an external memory device. The device’s functions and features can be enhanced by subsequent Function Image™ releases, facilitating in-the-field upgrades. Half-duplex QAM Modem 4/16/64 QAM: up to 96kbps in 25kHz Channel Estimation and Equalisation Packet and Raw Modes with FEC Formatted Blocks for Packet Construction Two Frame Sync Detectors and Auto Frame Sync Detect Rx Carrier Frequency and Phase Correction Zero IF Radio Interface Digital IF Filter Reconfigures for Multiple RF Channel Spacings Tx and Rx ‘Direct Connect’ Automatic DC Offset Correction Rx Signal Quality Measurement Auxiliary DAC, ADC and GPIO Features Autonomous RAMDAC Sequencer Sequence GPIO on Tx or Rx Trigger Synthesised Clock Generators Flexible C-BUS/SPI Serial Interface Pass-through Mode Expands Host/SPI Capacity Supply Requirement Range: 3.0 to 3.6 V Applications High Performance Narrowband Radios Telemetry, SCADA and Data Modems Digital Software Defined Radio (SDR) High-speed Wireless Data Packages CMX7163L9 64-pin LQFP CMX7163Q1 64-pin VQFN Operating Temperature -40 to +85 ºC ADCs RF Tx I/Q DACs Digital Filters Digital Filters C-BUS/SPI master Support PE0601 - 7163 EvKit PE0002 EvKit Interface Card FIFO Modem Configuration QAM External Serial Devices Aux 2 x CLK Synth Aux 4 x DAC C-BUS Custom RF Rx I/Q Aux 4 x ADC Registers Aux 4 x GPIO Wireless Data Marine Safety and Comms Features Digital Voice Low Power Half-duplex Quadrature Data and Multiple Channel Spacing (6.25kHz to 25kHz) Support Analogue Two-way Radio and Digital PMR/LMR - Built on FirmASIC ® Technology - Host μC Specific Function Image™ FEC Supply Embedded 3.3V Typical Supply Current at 3.0 to 3.6 V Rx Tx Idle Powersaved Modem Modulation Symbol Rate RRC Filter Alpha Value min typ max - 24.1 to 34.1 11.1 550 1.0 - QAM 2000 to 20000 0.2 or 0.35 Wireline Data and Telephony Brief CMX7163 Technical Basics mA mA μA μA s/sec 49
