EVB71122 Datasheet, PDF (2/32 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 .................................................................................................................. 5
1.4 Enable/Disable in ABC Mode ........................................................................................... 6
1.5 Demodulation Selection in ABC Mode.............................................................................. 6
1.6 Programming Modes ........................................................................................................ 6
1.7 Preconfigured Frequencies in ABC Mode ........................................................................ 6
2 Functional Description ..............................................................................................7
2.1 Frequency Planning.......................................................................................................... 7
2.2 Calculation of Counter Settings ........................................................................................ 8
2.2.1 Calculation of LO1 and IF1 frequency for Low Frequency Bands............................................... 8
2.2.2 Calculation of LO1 and IF1 frequency for High Frequency Bands.............................................. 9
PRELIMINARY ^{2.2.3 Counter Setting Examples for SPI Mode..................................................................................... 9}
2.2.4 Counter Settings in ABC Mode – 8 Preconfigured Channels.................................................... 10
2.2.5 PLL Counter Ranges ................................................................................................................. 11
2.3 SPI Description............................................................................................................... 11
2.3.1 General ...................................................................................................................................... 11
2.3.2 Read / Write Sequences............................................................................................................ 12
2.3.3 Serial Programming Interface Timing ........................................................................................ 12
3 Register Description ................................................................................................13
3.1 Register Overview .......................................................................................................... 13
3.1.1 Control Word R0 ........................................................................................................................ 15
3.1.2 Control Word R1 ........................................................................................................................ 16
3.1.3 Control Word R2 ........................................................................................................................ 17
3.1.4 Control Word R3 ........................................................................................................................ 17
3.1.5 Control Word R4 ........................................................................................................................ 18
3.1.6 Control Word R5 ........................................................................................................................ 18
3.1.7 Control Word R6 ........................................................................................................................ 18
3.1.8 Control Word R7 (Read-only Register)...................................................................................... 19
4 Application Circuits .................................................................................................20
4.1 Standard FSK & ASK Circuit in SPI Mode...................................................................... 20
4.1.1 Averaging Data Slicer Configured for Bi-Phase Codes............................................................. 20
4.1.2 Component Arrangement Top Side for SPI Mode (Averaging Data Slicer) .............................. 21
4.1.3 Peak Detector Data Slicer Configured for NRZ Codes ............................................................. 22
4.1.4 Component Arrangement Top Side for SPI Mode (Peak Detector Data Slicer)........................ 23
4.1.5 Board Component Values List (SPI mode)................................................................................ 24
39012 71122 01
Rev. 001
Page 2 of 32
EVB Description
Sept/06