ATREB233SMAD-EK Microchip

APPLICATION NOTE Atmel AVR2162: REB233SMAD Hardware User Manual 8-bit Atmel Microcontrollers Features High-performance 2.4GHz RF-CMOS Atmel AT86RF233 radio transceiver targeted for IEEE 802.15.4, ZigBee, ZigBee RF4CE, 6LoWPAN and ISM applications Industry leading 101dB linkbudget Ulta-low current consumption Ultra-low supply voltage (1.8V to 3.6V) Hardware supported antenna diversity RF reference design and high-performance evaluation platform Interfaces to several of the Atmel microcontroller development platforms Board information EEPROM MAC address Board identification, features, and serial number Crystal calibration values Introduction This manual describes the REB233SMAD radio extender board supporting antenna diversity in combination with the Atmel AT86RF233 radio transceiver. Detailed information is given in the individual sections about the board functionality, the board interfaces, and the board design. The REB233SMAD connects directly to the REB controller base board (REB-CBB), or can be used as an RF interface in combination with one of the Atmel microcontroller development platforms. The REB233SMAD together with a microcontroller forms a fully functional wireless node. Figure 1. REB233SMAD Radio Extender Board. 42006B AVR 07/2012 Table of Contents 1. Disclaimer ............................................................................................ 3 2. Overview .............................................................................................. 3 3. Functional description .......................................................................... 3 3.1 Interface connector specification ....................................................................... 4 3.1.1 Atmel ATmega1281 configuration ....................................................... 4 3.1.2 Atmel ATmega644 configuration ......................................................... 5 3.2 ID EEPROM ...................................................................................................... 6 3.3 Supply current sensing ...................................................................................... 7 3.4 Radio transceiver reference clock ..................................................................... 8 3.5 RF section ......................................................................................................... 8 4. PCB layout description ......................................................................... 9 4.1 PCB detail 1 balanced RF pin fan out .......................................................... 10 4.2 PCB detail 2 RF switch ................................................................................ 11 4.3 PCB detail 3 crystal routing .......................................................................... 11 4.4 PCB detail 4 transceiver analog GND routing .............................................. 12 4.5 PCB detail 5 digital GND routing and shielding ............................................ 13 4.6 PCB detail 6 transceiver RF tuning .............................................................. 14 4.7 Antenna connection ........................................................................................ 15 5. Mechanical description ...................................................................... 16 6. Electrical characteristics .................................................................... 17 6.1 Absolute maximum ratings .............................................................................. 17 6.2 Recommended operating range ...................................................................... 18 6.3 Current consumption ....................................................................................... 18 6.4 Duty cycle requirements .................................................................................. 19 7. Abbreviations ..................................................................................... 19 Appendix A. PCB design data ........................................................... 20 A.1 Schematic ....................................................................................................... 20 A.2 Assembly drawing ........................................................................................... 21 A.3 Bill of materials ................................................................................................ 21 Appendix B. Radio certification .......................................................... 23 B.1 United States (FCC) ........................................................................................ 23 B.2 Europe (ETSI) ................................................................................................. 24 B.3 Approved antenna ........................................................................................... 24 8. References ......................................................................................... 25 9. Revision history REB233SMAD PCBA .............................................. 26 10.EVALUATION BOARD/KIT IMPORTANT NOTICE ........................... 27 2 Atmel AVR2162: REB233SMAD Hardware User Manual APPLICATION NOTE 42006B AVR07/2012