EVB71122_15 Datasheet, PDF (2/31 Pages) Melexis Microelectronic Systems – 300 to 930MHz Receiver Evaluation Board Description

EVB71122
300 to 930MHz Receiver
Evaluation Board Description
Document Content
1 Theory of Operation...................................................................................................4
1.1 General........................................................................................................................... 4
1.2 EVB Data Overview ........................................................................................................ 4
1.3 Block Diagram ................................................................................................................ 6
1.4 Enable/Disable in ABC Mode .......................................................................................... 7
1.5 Demodulation Selection in ABC Mode ............................................................................ 7
1.6 Programming Modes ...................................................................................................... 7
1.7 Preconfigured Frequencies in ABC Mode ....................................................................... 7
2 Functional Description ..............................................................................................8
2.1 Frequency Planning ........................................................................................................ 8
2.2 Calculation of Counter Settings....................................................................................... 9
2.2.1 Calculation of LO1 and IF1 frequency for Low Frequency Bands ................................................9
2.2.2 Calculation of LO1 and IF1 frequency for High Frequency Bands..............................................10
2.2.3 Counter Setting Examples for SPI Mode ....................................................................................10
2.2.4 Counter Settings in ABC Mode – 8+1 Preconfigured Channels..................................................11
2.2.5 PLL Counter Ranges...................................................................................................................12
2.3 SPI Description ............................................................................................................. 12
2.3.1 General .......................................................................................................................................12
2.3.2 Read / Write Sequences .............................................................................................................13
2.3.3 Serial Programming Interface Timing..........................................................................................13
3 Register Description ................................................................................................14
3.1 Register Overview ........................................................................................................ 14
3.1.1 Control Word R0 .........................................................................................................................16
3.1.2 Control Word R1 .........................................................................................................................17
3.1.3 Control Word R2 .........................................................................................................................18
3.1.4 Control Word R3 .........................................................................................................................18
3.1.5 Control Word R4 .........................................................................................................................19
3.1.6 Control Word R5 .........................................................................................................................19
3.1.7 Control Word R6 .........................................................................................................................19
3.1.8 Control Word R7 (Read-only Register) .......................................................................................20
4 Application Circuits for SPI Mode ..........................................................................21
4.1 Averaging Data Slicer Configured for Bi-Phase Codes ................................................. 21
4.2 Peak Detector Data Slicer Configured for NRZ Codes .................................................. 23
4.2.1 Board Component Values List (SPI mode) .................................................................................25
5 Hardware and Software Requirements ..................................................................26
6 Evaluation Board Layouts .......................................................................................27
7 Package Description................................................................................................28
39012 71122 01
Rev. 005
Page 2 of 31
EVB Description
Nov/15