Changes

This target See [https://rtfm.newae.com/Targets/UFO%20Targets/CW308T-ATMega1284RFR2/ NewAE RTFM Page] which is for now built from the ATMega2564RFR2[https://github. This makes a great com/newaetech/chipwhisperer-target for exploring IoT technologies, such as mesh networking protocols-cw308t GIT Repo].

[[File:meagrf_render_02.png|400px]] == Usage Notes == === Internal / External VCC-INT Supply === By default the MegaRF will provide the VCC-INT supply. If you wish to use an external supply you will have to use the VADJ setting The previous content on the CW308 to set the VCC-INT supply to be slightly higher than 1.8V, which would cause the MegaRF on-board regulator to shut down. In our experimentation the internal VCC-INT regulator worked fairly well, and did not add significant noise to any measurements. === SPI Connections === There is a SPI flash chip connected to the ATmegaRF2564RFR2. During development you may require an external programmer to load this flash chip, and the MegaRF must be disconnected wiki has been moved to do this safely. If you do not disconnect the MegaRF SPI lines & try holding the MegaRF in reset to tri-state the SPI lines, you may end up accidentally loading an ISP programming command. GPIO3 is normally used to switche the 4066 electronic switch from connecting the external SPI connections between the SPI-Flash memory chip and the MegaRF device. You must set GPIO3 high to allow programming of the MegaRF chip, otherwise it is pulled low which disconnects the MegaRF.  == Programming == The ChipWhisperer's AVR programmer supports this target directly. No external programmer is requiredabove link. == Schematic == See GIT Repo for PDF of schematic. [[File:CW308T_ATMegaRF_02.png|1000px]] == Board Layout == See GIT Repo for gerber files. == Radio Usage == Note NO ANTENNA is provided as the board is sold only as a sub-assembly and not designed to be used as a radio transmitter. Mounting a 2.4 GHz radio antenna (SMA, NOT reverse-polarity SMA) wiki history if you would like Digi-Key P/N 1475-1014-ND could potentially require you to meet FCC/CE guidelines for RF emissions and is UNSUPPORTED USAGE. == Historical Note == The following is the original (-01) schematic. The -01 PCBs were never publicly released and used during development only. The following changes were made in -02: * MOSI/MISO was switched on Atmel device (requires PCB fix on -01, or PCB will not work)* TST connected to ground (requires PCB fix on -01, or PCB will not work)* CLKI pull down* GPIO3 is now optionally in control view exact older versions of 4066 instead of being hardwired* Serial resistors added on SCK/MISO/MOSI lines [[File:CW308T_ATMegaRF_01this page.png|200px]] [[Category:Targets]][[Category:CW308 Targets]]