CMX7143

Product Preview CMX7143 Multi-Mode Wireless Data Modem September 2007/2 Function Image™ FI-2.0 = 4FSK Modem Operation Function Image™ FI-1.0 = GMSK Modem Operation Features • • • • Modulation scheme set by Function Image™ Half-duplex operation 4.8kbps to 19.2kbps data rates Fast frame sync detection AFSD (Automatic Frame Sync Detection) Raw data mode Flexible packet data mode (frame sync, payload, CRC and FEC) ‘Air compatible’ mode (CMX909B/FX919B) Soft decision decoding option C-BUS serial interface to host micro RSSI processing Flexibility built on FirmASIC® technology Features (Continued) 2 x auxiliary ADCs with 4 mux I/Ps 4 x auxiliary DACs 2 x auxiliary system clocks Flexible powersave modes Low power (3.0V to 3.6V) operation Small 48-pin LQFP and VQFN packages • • • • • • • Applications Wireless data modems Software defined modem systems Point-to-point telemetry systems M2M applications Traffic location systems General wireless telemetry Transceiver control Tx C-BUS Rx SPI port connection Aux. ADCs OR Stored in Host Memory RF Transceiver Aux. DACs CMX7143 Multi-Mode Wireless Data Modem Flash E2 Function Image™ Host µC Aux. Clocks Modulation 1 Function Image™ Tx Enable Modulation 2 Function Image™ Rx Enable Modulation n GPIO Tx Trigger System Overview Diagram Brief Description The CMX7143 is a flexible half duplex, multi-mode wireless data modem IC configured by the Function Image™ (FI) that is uploaded to the device: GMSK modem operation with FI-1.0 and 4FSK modem operation with FI-2.0. The device implements a comprehensive wireless data modem function. Raw data and packet data modes of operation are available; the packet mode being an enabler to achieve the lowest system operating power by minimising the host microcontroller interaction. Communication to a host is via a flexible serial bus (C-BUS). The device includes carrier sense function for LBT (Listen Before Transmit) applications and can automatically control the transmit hardware, including a RAMDAC feature for PA ramping. Other features include two Auxiliary ADCs with four selectable inputs and four auxiliary DAC interfaces (with an optional RAMDAC on the first DAC output, to facilitate transmitter power ramping). The device has flexible powersaving modes and RSSI processing and is available in both LQFP and VQFN packages. © 2007 CML Microcircuits 1/5 Product Preview CMX7143 Multi-Mode Wireless Data Modem The CMX7143 utilises CML's proprietary FirmASIC® component technology. On-chip sub-systems are configured by a Function Image™: this is a data file that is uploaded during device initialisation which defines the device's function and feature set. The Function Image™ can be loaded automatically from an external EEPROM or host µController over the built-in C-BUS serial interface. The device's functions and features may be enhanced by subsequent Function Image™ releases, facilitating in-the-field upgrades. One or more modulation schemes as Function Images can be held in either an EEPROM attached to the device or in the host microcontroller’s Flash memory. On power-up one of the stored FIs can be loaded into the CMX7143 to set its operating modulation scheme. During operation, should a different modulation scheme be required, the operating FI can be replaced with the appropriate new FI. Brief Description (Continued) Block Diagram Receive Functions Rx I/P 1 Transmit Functions VBias Rx I/P 2 Mux VBias Rx I/P 3 RSSI Monitor Tx Mode Select O/P 2 O/P 1 Tx Mode Select VBias Rx Signal Routing Filtering Filtering AFSD Modem Demodulator Rx Eye Packet Data Free Format Data Packet Data Free Format Data Modem Modulator Rx Data Modem Rx Data Buffer Rx Data Buffer Tx Data Modem Auxiliary Functions Clock O/P 2 Clock O/P 1 System Clock 1 System Clock 2 Function Image™ Configured IO Tx Enable Rx Enable Tx Trigger GPIO System Clocks GPIO Internal signal Thresholds ADC I/P 1 ADC I/P 2 ADC I/P 3 ADC I/P 4 MUX Thresholds ADC 2 Averaging DAC 4 DAC 3 ADC 1 Averaging DAC 2 Ramp profile RAM DAC 1 DAC 1 DAC 2 DAC 3 DAC 4 Multiplexed ADCs DACs System Control EPSI EPSClk EPSO EPCSN SSOUT SPI EEPROM Interface Bias Bias Main PLL Boot Control Crystal oscillator Registers Power control C-BUS Interface IRQ Reply Data CSN CMD Data Serial Clk AVdd DVdd VDec Boot En1 Boot En2 VBias © 2007 CML Microcircuits 2/5 Clk/Xtal XtalN AVss DVss Product Preview CMX7143 Multi-Mode Wireless Data Modem Function Image™ FI-2.0 - 4FSK Modem Overview • • Configurable data rates up to 19.2kbps Packet data definition as defined within the FX/MX919B datasheet o Symbol Sync o Flexible frame structure, header, intermediate and last blocks can all be: 6bytes, 9bytes or 12bytes o Frame Sync Default FX/MX919B User programmable o Header block CRC coding/decoding o Intermediate blocks o Last blocks CRC coding/decoding o FEC Trellis coding/decoding o Interleaving/de-interleaving Frame construction/destruction utilising a data buffer Header Block 76543210 Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8 Byte 9 Byte 10 Byte 11 CRC2 (4 bytes) • Intermediate Blocks 76543210 Last Block 76543210 Data Bytes (10) Data Bytes (12) Data Bytes (8) CRC1 (2 bytes) 7 Byte 0 07 Byte 1 0 7 Byte 11 0 '000' tri-bits 0 1 2 3 4 5 29 30 31 32 FEC TRELLIS CODING / DECODING ( ERROR CORRECTION ) 4-level symbols 0 1 2 64 65 INTERLEAVING / DE-INTERLEAVING Over-air signal (symbols) SYMBOL SYNC FRAME SYNC 24 'HEADER' BLOCK 66 66 INTERMEDIATE BLOCKS 66 'LAST' BLOCK 66 FRAME PREAMBLE FRAME Frame Sync: -1 +1 -1 +1 -1 +3 -3 +3 -3 -1 +1 -3 +3 +3 -1 +1 -3 -3 +1 +3 -1 -3 +1 +3 sent first Symbol Sync : at least 24 symbols of '..+3 +3 -3 -3 ...' sequence © 2007 CML Microcircuits 3/5 last Product Preview CMX7143 Multi-Mode Wireless Data Modem Function Image™ FI-1.0 - GMSK Modem Overview • • • Configurable data rates up to 19.2kbps Viterbi decoding algorithm Packet data definition as defined within the CMX909B datasheet o Programmable BT = 0.25, 0.27, 0.3 and 0.5 o Frame sync words o Frame header o Data block Data block size CRC and FEC coding and decoding Interleaving/de-interleaving Scrambling/de-scrambling Including Mobitex R14N short block frames Flexible frame structure Head and Data block o Complete frame construction/destruction utilising a data buffer Frame Head 7654 3210 Bit sync 1 Bit sync 2 Frame sync 1 Frame sync 2 Control byte 1 Control byte 2 FEC1 FEC2 Data Block 7654 3210 3210 Short Data Block 7654 3210 3210 Data (4 bytes) CRC (2 bytes) FEC Data (18 bytes) FEC CRC (2 bytes) Normal or Short Data-Block Selection Interleave / De-Interleave Selectable Scramble / De-Scramble Over Air Signal Bit Sync. 16 Frame Sync. 16 Control Bytes 24 FEC Data Blocks Frame Head Frame Data Blocks ( 0 to 32 ) © 2007 CML Microcircuits 4/5 Product Preview CMX7143 Multi-Mode Wireless Data Modem Product Support • • • PE0401 is the evaluation card for the CMX7143 Specific Function Images can be downloaded into the PE0401 for complete evaluation of the CMX7143 device Microcontroller evaluation/emulator kit is required with a suitable program to control the PE0401 C-BUS port PE0401 CMX7143 Evaluation Kit Microcontroller Evaluation/Emulator kit RS232/USB C-BUS Products CMX7143Q3 – 48 pin VQFN package CMX7143L4 – 48 pin LQFP package PE0401 – Evaluation kit CML website www.cmlmicro.com Product overview Product preview document Datasheet CML technical portal (My CML) Complete datasheet + product user manual Function Image™ data files Evaluation kit support Application notes FAQs www.cmlmicro.com Oval Park, Langford, Maldon, Essex, CM9 6WG - England. 4800 Bethania Station Road, Winston-Salem, NC 27105 - USA. No 2 Kallang Pudding Road, #09 - 05/06 Mactech Industrial Building, Singapore 349307 No. 218, Tian Mu Road West, Tower 1, Unit 1008, Shanghai Kerry Everbright City, Zhabei, Shanghai 200070, China. Tel: +86 21 6317 4107 +86 21 6317 8916 Fax: +86 21 6317 0243 Sales: cn.sales@cmlmicro.com.cn Technical Support: sg.techsupport@cmlmicro.com Tel: +44 (0)1621 875500 Fax: +44 (0)1621 875600 Sales: sales@cmlmicro.com Technical Support: techsupport@cmlmicro.com Tel: +1 336 744 5050, 800 638 5577 Fax: +1 336 744 5054 Sales: us.sales@cmlmicro.com Technical Support: us.techsupport@cmlmicro.com Tel: +65 6745 0426 Fax: +65 6745 2917 Sales: sg.sales@cmlmicro.com Technical Support: sg.techsupport@cmlmicro.com © 2007 CML Microcircuits 5/5