Datasheet CMX7146 (CML Microcircuits) - 3

link to page 7 link to page 9 link to page 11 link to page 13 link to page 14 link to page 17 link to page 21 link to page 24 link to page 24 link to page 25 link to page 26 link to page 35 link to page 36 BPSK Wireless Data Modulator CMX7146 Figure 2 CMX7146 Recommended External Components ... 7 Figure 3 CMX7146 Power Supply and De-coupling .. 9 Figure 4 C-BUS Transactions .. 11 Figure 5 FI Loading from Host .. 13 Figure 6 FI Loading from EEPROM ... 14 Figure 7 Transmit Sequence .. 17 Figure 8 Digital Clock Generation Schemes ... 21 Figure 9 Modulation Process ... 24 Figure 10 Outline Radio Design ... 24 Figure 11 Tx Modulation Spectra MOD1/MOD2 I/Q output to Sig Gen 4800 bps ... 25 Figure 12 TX Modulation output from CMX971 4800 bps .. 26 Figure 13 C-BUS Timing ... 35 Figure 14 Mechanical Outline of 48-pin VQFN (Q3) .. 36 It is recommended that you check for the latest product datasheet version from the CML website: [www.cmlmicro.com].
1.1 History Version Changes Date
1 Original document, prepared for first beta release of software. 1st August 2019 Note: This product is in development: Changes and additions will be made to this specification. Items marked TBD or left blank will be included in later issues.  2019 CML Microsystems Plc Page 3 D/7146/1 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