Datasheet CMX7146 (CML Microcircuits)

CMX7146 BPSK Wireless Data Modulator 7146FI-1.x: BPSK Wireless Data Modulator
D/7146/1 August 2019
DATASHEET
Advance Information
Features Plain or differential BPSK encoding Low-power (3.0V to 3.6V) operation 600, 1200, 3600, 4800, 9600bps data rates Available in 48-lead VQFN Package Selectable RRC filter (α = 0.2, 0.3, 0.35) C-BUS serial interface to host µController Applications C-BUS thru-port control of CMX971 Marine emergency beacons 2 x Auxiliary ADCs and 4 x auxiliary DACs IIoT transmitters Auxiliary system clock outputs CubeSat communications
CMX7146 System Clk Clock Synthesizers C-BUS Registers 2 aux ADCs 3 aux DACs Status System 1 aux/RAM DAC Tx Trigger Input Mode/Aux GPIO Host µC C-BUS Tx Sequence Data Buffer Control MOD1 gain Data Tx RF MOD2 gain Modem Configuration Config (in Idle) Parameters
1 Brief Description
CMX7146 FI-1.x is a BPSK data modulator for use in wireless systems, with automatic control of transmit hardware including RAMDAC for PA ramping. Other features include two Auxiliary ADC channels with four selectable inputs and up to four auxiliary DAC outputs (with the optional RAMDAC on the first DAC output, to facilitate transmitter power ramping). The device has flexible powersaving modes and is available in a VQFN package. The device 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 and defines the device's function and feature set. The Function Image™ can be loaded automatically from an external EEPROM or from a host µController 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. 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.  2019 CML Microsystems Plc Document Outline Datasheet Front Page 1 Brief Description 1.1 History 2 Signal List 3 External Components 4 PCB Layout Guidelines and Power Supply Decoupling 5 General Description 5.1 CMX7146 Features 6 Detailed Descriptions 6.1 Xtal Frequency 6.2 Host Interface 6.2.1 C-BUS Operation 6.3 Function Image Loading 6.3.1 FI Loading from Host Controller 6.3.2 FI Loading from Flash/EEPROM 6.4 Device Control 6.4.1 Device Configuration (using the Programming Register) 6.4.2 Device Configuration (using dedicated registers) 6.4.3 Interrupt Operation 6.4.4 Signal Routing 6.4.5 Loading Transmit Data 6.4.6 The Transmit Sequence 6.4.7 Other Modem Modes 6.4.8 Data Transfer 6.4.9 Raw Data Transfer 6.4.10 Pre-loading transmit data 6.4.11 Auxiliary clock rates 6.4.12 Auxiliary data 6.4.13 GPIO Pin Operation 6.4.14 Auxiliary ADC Operation 6.4.15 Auxiliary DAC / RAMDAC Operation 6.5 Digital System Clock Generators 6.5.1 System Clock Operation 6.6 Signal Level Optimisation 6.7 C-BUS Register Summary 7 CMX7146 FI-1.x Features 7.1 Modulation 7.2 Radio Interface 7.3 Transmit Performance 8 Performance Specification 8.1 Electrical Performance 8.1.1 Absolute Maximum Ratings 8.1.2 Operating Limits 8.1.3 Operating Characteristics 8.1.4 Parametric Performance 8.2 C-BUS Timing 8.3 Packaging END OF DOCUMENT