© 2015 CML Microsystems Plc 1

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CMX7164 Multi-mode Wireless Data Modem GMSK/GFSK ∙ 2/4/8/16 FSK ∙ 4/16/64 QAM ∙ V.23

Brief Description

The CMX7164 Multi-mode Wireless Data Modem is a half-duplex device supporting V.23, GMSK/GFSK, 2-FSK (2-Level FSK ), 4-FSK (4-Level FSK), 8-FSK (8-Level FSK), 16-FSK (16-level FSK), 4 QAM, 16 QAM and 64 QAM operating modes, configurable for multiple channel spacings via host control.

Robust flexible packet data structures including forward error correction and raw data modes are available, supporting user requirements covering a wide range of applications. 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 sub-systems perform valuable functions and minimise host interaction and host I/O resources. Two synthesised system clock generators develop clock signals for off-chip use. The 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 including modulation type, are configured by a Function Image™ (FI) data file that is uploaded during device initialisation and defines the device's function and feature set.

The combination of the CMX7164 Multi-mode Wireless Data modem and the CMX994 Direct Conversion Receiver and CMX998 Cartesian Feedback Loop Transmitter enables the highest integration wireless data modem to be realised.

The CMX7164 operates from a 3.0 to 3.6 V supply, includes selectable powersaving modes and is available in small 64-pin VQFN and LQFP packages.

Modems Supported via Function Image™

PP/7164/5 May 2015

Introduction Machine to Machine (M2M) wireless data is an important function in our ever-expanding digital communication world.

Narrowband wireless data systems form an important role in the professional markets, providing high speed, security and low latency.

CML‘s range of Wireless Data Modem ICs includes multi-mode devices that address multiple modulation schemes with flexibility and high performance.

Features Half-duplex modem supporting

multiple modulations V.23 GMSK/GFSK 2/4/8/16 FSK 4/16/64 QAM

High-performance I/Q radio interface

Direct connection to zero IF receiver/transceiver

Reconfigurable digital IF filters for multiple RF channel spacings

Deviation control without manual trim (Tx)

I/Q trimming

Serial bus (C-BUS) controlled

Read/write 128-byte FIFOs and data buffers streamline transfers and relax host service latency

Applications High-performance narrowband data

radio

Telemetry/SCADA/M2M data modems

6.25kHz to 25kHz channels

ETSI, FCC, ARIB compliant

FCC part 90 spectral efficiency requirements

Software Defined Radio (SDR)

High-speed wireless data

Mobile data for fading channels

Legacy modem interconnect

Function Image™ System Symbol Rate Bits/Symbol

7164FI-1.x GMSK/GFSK Modem 2,000 to 20,000 sym/s 1

7164FI-2.x 2-FSK, 4-FSK , 8-FSK, 16-FSK Modem 2,000 to 10,000 sym/s 1, 2, 3 or 4

7164FI-4.x 4QAM, 16QAM, 64QAM Modem 2,000 to 20,000 sym/s 2, 4 or 6

7164FI-6.x V.23 Modem 1 1,200 sym/s

Small VQFN /LQFP Packages

© 2015 CML Microsystems Plc 2

Product Preview CMX7164 Multi-mode Wireless Data Modem

Modulation Schemes Supported The CMX7164 is intended for use in half-duplex modems. Transmission takes the form of a data burst consisting of preamble, frame sync and data payload, followed by a tail sequence. Reception may utilise the preamble to assist with signal acquisition, but is then followed by frame sync detection and data decoding. A flexible power control facility allows the device to be placed in its optimum powersave mode when not actively processing signals. The device includes a Xtal clock generator, with phase-locked-loop and buffered output, to provide a System Clock outputs, for other peripheral devices.

GMSK/GFSK - Function Image 7164FI-1.x -

These modulation schemes are provided with BT=0.5, 0.3, 0.27 or 0.25 up to 20kbps. User-programmable filters with flexible bit rates and coding supports a wide range of applications requiring data robustness. Zero IF (I/Q) and two-point modulation (Mod1/2) transmit modes are supported along with zero IF in receive mode. The GMSK/GFSK data is over-air compatible with the CMX909B and the CMX7143 Function Image 7143FI-1.x.

2-FSK , 4-FSK and 8-FSK, 16-FSK - Function Image 7164FI-2.x - These modulation schemes are supported with root raised cosine filtering (alpha=0.2) and optional sinc filtering (user-programmable filters are also possible). Flexible bit rates support a wide range of applications requiring selectable bit rates and robustness up to 10ksymbols/s in a 25kHz channel. Zero IF (I/Q) and two-point modulation (Mod1/2) transmit modes along with zero IF receive mode. The 4-FSK data is over-air compatible with the FX/MX919B and the CMX7143 with Function Image 7143FI-2.x. Additionally, 4-FSK coded mode also supports RD-LAP channel coding which is over-air compatible with CMX969.

8-FSK and 16-FSK constant envelope modulation provides increased data throughput. A range of coding schemes are available that can be selected based on the channel requirements. An Auto Modulation Detection mode ‘AutoModDetect’ is available, enabling backward compatibility with existing 4-FSK systems.

4-QAM, 16-QAM and 64-QAM - Function Image 7164FI-4.x These modulation schemes are supported with root raised cosine filtering (alpha=0.2, 0.35) or a user programmable filter. Supporting up to 96kbps in a 25kHz channel with channel estimation and equalisation to provide robust performance under realistic channel conditions. Zero IF (I/Q) interface in both transmit and receive. Maximum flexibility is provided via a range of FEC rates, allowing selection against different channel conditions. Receive signal quality measurement is also supported to make a useful assessment of link conditions. QAM data is over-air compatible with the CMX7163 Function Image 7163FI-4.x.

Raw data modes are available and enable user-defined packet structures to support a wide range of applications.

V.23 Modem - Function Image 7164FI-6.x The V.23 modem enables communication with legacy Telecom systems. The implementation supports 1200 baud 1 to 8 byte data blocks with start bit, stop bit and parity generation in transmit and start bit, stop bit and parity checking and removal in receive.

Function Image™ is the key to flexibility The Function Image™ concept is the key to a multi-mode wireless data platform. A Function Image™ is a small data file that is uploaded to the CMX7164 during power-up. The Function Image™ configures on-chip sub-systems to provide the operation and functionality for a specific application.

Block Diagram for I/Q Tx/Rx 2/4/8/16 FSK Operation

I/Q

Demod

I

ADC

Q

ADC Host

µC

FIFOConstruct

Frame: Add

Preamble,

Framesync

and Tails

Channel

Coder

I

DAC

Q

DAC

BufferRF Tx I/Q Mod

BufferRF Rx FM

Demod

FM

Mod

Channel Decoder:

Error Correct/

Detect

Auto Frame

Sync Detect

RSSI

Link Quality

Detect

CDATA

RDATA

FIFO

CSN

SCLK

IRQNCoded Mode Data

(4-FSK only)

Raw Mode Data

Re

gis

ters

Raw Mode Data

Coded

Mode Data

I

Q

Channel Filters

Q

I

Pulse

Shaping

Filter

Symbol

De-mapper

(2/4/8/16-

FSK)

Pulse

Shaping

Filter

Symbol

Mapper

(2/4/8/16-

FSK)

© 2015 CML Microsystems Plc 3

Product Preview CMX7164 Multi-mode Wireless Data Modem

Tx Functions

Automatic preamble and frame sync insertion simplifies host control

I/Q analogue outputs (7164FI-4.x), I/Q or two-point modulation analogue outputs (7164FI-1.x or 7164FI-2.x)

Pulse shape filtering

RAMDAC capability for PA ramping control

Tx trigger feature allowing precise control of burst start time

Tx burst sequence for automatic RAMDAC ramp and Tx hardware switching

Carrier sense for “listen before talk” operation

Raw and formatted (channel coded) data modes

Flexible Tx coded data block size, up to 416 bytes (7164FI-4.x 4/16/64 QAM), 12 bytes (7164FI-2.x 2/4/8/16 FSK), 18 bytes (7164FI-1.x GMSK/GFSK)

Rx Functions

Automatic frame sync detection simplifies host control

I/Q analogue inputs

Rx channel filtering and pulse shape filtering

Channel estimation and equalisation

Tracking of symbol timing and input I/Q dc offsets

AGC using SPI Thru-Port

Raw and formatted (channel coded) data modes

Flexible Rx coded data block size, up to 416 bytes (7164FI-4.x 4/16/64 QAM), 12 bytes (7164FI-2.x 2/4/8/16 FSK), 18 bytes (7164FI-1.x GMSK/GFSK)

Auxiliary Functions

Two programmable system clock outputs

Four auxiliary ADCs with six selectable input paths

SPI Thru-Port for interfacing to synthesisers, Cartesian loop IC (CMX998), direct conversion receiver (CMX994) and other serially-controllable devices

In-built calibration routine to support CMX998 Cartesian loop transmitter IC

Four auxiliary DACs, one with built-in programmable RAMDAC

Interface Optimised C-BUS (4-wire, high speed synchronous serial command/data bus) interface to host for control and data

transfer, including streaming C-BUS for efficient data transfer

Open drain IRQ to host

Four GPIO pins

Tx trigger input (Provided by GPIOA)

Serial memory or C-BUS (host) boot mode

I/Q Tx/Rx signal interface - the transmitted signal is provided as an I/Q baseband, for mixing up onto an RF carrier, with amplification

Two-point Tx and I/Q Rx - 7164FI-2.x (2/4/8/16 FSK) and 7164FI-1.x (GMSK/GFSK) modulation and can be configured to produce two-point Tx modulation, this option is not supported for 7164FI-4.x (4/16/64 QAM)

I/Q Tx/Rx Signal Interface Two-point Tx and I/Q Rx

Radio Receiver

CMX7164

Transmit

Processing

T/R

IOUTPUT QOUTPUT

IINPUT

QINPUT

Receive

Processing

Mix onto RF carrier and

linearise if required

Radio Receiver

CMX7164

Transmit

Processing

T/R

IOUTPUT QOUTPUT

IINPUT

QINPUT

Receive

Processing

Reference

(e.g VCTCXO)

VCO

PLL

(MOD2)(MOD1)

Control

Voltage

Input

© 2015 CML Microsystems Plc 4

Product Preview CMX7164 Multi-mode Wireless Data Modem

CMX7164 Electrical Specification Summary

Operating Limits Min Typ Max Unit

Supply Voltage:

DVDD – DVSS 3.0 3.3 3.6 V

DVCORE – DVCORE 1.7 1.8 1.9 V

AVDD – AVSS 3.0 3.3 3.6 V

Operating Temperature -40 - +85 °C

Xtal Frequency 3.0 - 12.288 MHz

External Clock Frequency 3.0 - 24.576 MHz

Supply Current

All Powersaved DIDD + AIDD

Idle Mode DIDD

AIDD Rx Mode (GMSK/GFSK)

DIDD (8ksymbols/s Search for FS) DIDD (8ksysbols/s FS Found)

AIDD Tx Mode DIDD (8k symbols/s)

AIDD

- - - - - - - - -

1.0

550 17

10.3 9.4 8.7 4.3 4.9 7.7

- - - - - - - - -

µA

µA µA

mA mA mA mA mA mA

CMX994I

Q

I

Q

Ref Osc(19.2MHz)

x3

T/R

PA(RF5110G)

RegulatorJ2

PowerPA_Supply

Regulator

Regulator

Regulator

+3V3D

+3V3A

+3V3A_Rx/Tx

+3V3_VCO

J1

Antenna

VCO

2

2

2

2

RX ADCs

TX DACs

AUXADC/

DAC

RAMDAC

GPIO

THRU

CBUS

C-BUS

J3

C-BUS

Interface

Frac-N

PLL

CMX998

5

4

4

4

Rx_EN

TX_RX

J4

External LO

KEY

Interface Connector

Coax Connector

CMX7164

DE9941 Demonstrator Block Diagram Design example for a highly integrated QAM based wireless data modem

© 2015 CML Microsystems Plc 5

Product Preview CMX7164 Multi-mode Wireless Data Modem

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800 638 5577

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us.sales@cmlmicro.com

us.techsupport@cmlmicro.com

+65 62 888129

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www.cmlmicro.com Search for: CMX7164

CML’s proprietary FirmASIC® component technology reduces cost, time to market and development risk, with increased flexibility for the designer and end application. FirmASIC® combines Analogue, Digital, Firmware and Memory technologies in a single silicon platform that can be focused to deliver the right feature mix, performance and price for a target application family. Specific functions of a FirmASIC® device are determined by uploading its Function Image™ during device initialization. New Function Images™ may be later provided to supplement and enhance device

functions, expanding or modifying end-product features without the need for expensive and time-consuming design changes. FirmASIC® devices provide significant time to market and commercial benefits over Custom ASIC, Structured ASIC, FPGA and DSP solutions. They may also be exclusively customised where security or intellectual property issues prevent the use of Application Specific Standard Products (ASSP’s).

FirmASIC , FirmCODEC , RALCWI, Function Image and DuraTALK are trademarks of CML Microsystems Plc.

CMX7164 Package Options

A

BC

H

TYP. MAX.MIN.DIM.

J

PT

1.000.80

0.05

0.30

0.50

0.00

0.20

0.18

9.00 BSC

9.00 BSC**

NOTE :

*

All dimensions in mm

Angles are in degrees

A & B are reference data and donot include mold deflash or protrusions.

F 7.807.00

G 7.807.00

L 0.500.30

Index Area 1

Dot

Index Area 2

Dot Chamfer

Index Area 1 is located directly above Index Area 2

Depending on the method of lead termination at the edge of the package, pull back (L1) may be present. L minus L1 to be equal to, or greater than 0.3mmThe underside of the package has an exposed metal pad which should ideally be soldered to the pcb to enhance the thermal conductivity and mechanical strength of the package fixing. Where advised, an electrical connection to this metal pad may also be required

L1 0.150

K 0.20

0.90

0.25

0.40

ExposedMetal Pad

64-pin LQFP Mechanical Outline (L9) 64-pin VQFN Mechanical Outline (Q1)

OR

Microcontroller

Emulator

DE9941 SDR Demonstrator CMX7164 Multi-mode Wireless Data modem CMX998 Cartesian Feedback Loop Transmitter CMX994 Direct Conversion Receiver

PE0601-7164 CMX7164 Evaluation Kit Demonstration Kit Evaluation Kit

OR

PE0003 Universal Interface board

Evaluation / Demonstration