Atmel RCB256RFR2, Hardware User Manual

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Atmel AVR10004: RCB256RFR2 – Hardware User Manual [APPLICATION NOTE]
42081A
−
AVR
−
03/2013
2
Table of Contents
1. Disclaimer .......................................................................................... 4
2. Overview ............................................................................................ 4
3. Mechanical Description ...................................................................... 5
3.1 Mechanical dimensions ..................................................................................... 5
3.2 Interface connector specification ....................................................................... 6
3.3 Application (base) board connectors ................................................................. 7
4. Functional Description ........................................................................ 8
4.1 Power supply..................................................................................................... 8
4.1.1 Battery power ...................................................................................... 8
4.1.2 External power .................................................................................... 8
4.2 Microcontroller................................................................................................... 9
4.3 On-chip radio transceiver .................................................................................. 9
4.4 Clock sources.................................................................................................... 9
4.4.1 Radio transceiver clock ....................................................................... 9
4.4.2 Microcontroller clock ........................................................................... 9
4.5 On-board peripherals ...................................................................................... 10
4.5.1 Key and LEDs ................................................................................... 10
4.5.2 ID EEPROM ...................................................................................... 10
4.6 External peripherals ........................................................................................ 12
4.7 PCB layout description .................................................................................... 14
4.7.2 PCB detail 1 – balanced RF fan out .................................................. 16
4.7.3 PCB detail 2 – balun ground connection ........................................... 17
4.7.4 PCB detail 3 – bias DC block, AC ground ......................................... 17
4.7.5 PCB detail 4 – analog GND routing .................................................. 17
4.7.6 PCB detail 5 – digital GND routing .................................................... 17
4.7.7 PCB detail 6 – ground plane ............................................................. 18
4.7.8 PCB detail 7 – crystal guard routing ................................................. 18
4.7.9 PCB detail 8 – RF section shielding .................................................. 18
4.7.10 board ground plane design ............................................................... 18
5. Programming ................................................................................... 19
6. Electrical characteristics ................................................................... 20
6.1 Absolute maximum ratings .............................................................................. 20
6.2 Recommended operating range ...................................................................... 20
6.3 General RF specifications ............................................................................... 20
6.4 Current consumption specifications ................................................................ 21
7. Abbreviations ................................................................................... 22
Appendix A. PCB design data .......................................................... 23
A.1 Schematic ....................................................................................................... 23
A.2 Assembly drawing ........................................................................................... 27
A.3 Bill of materials ................................................................................................ 28
Appendix B. Radio certification ........................................................ 29
B.1 United States (FCC) ........................................................................................ 29
B.2 Europe (ETSI) ................................................................................................. 30
B.3 Approved antenna ........................................................................................... 30
Appendix C. References .................................................................. 31
Appendix D. EVALUATION BOARD/KIT IMPORTANT NOTICE ...... 32