I'm working on a fun project, similar to Moteino, but coin cell battery powered and running at 8Mhz. Thing is, I keep destroying ATMega328p chips and I absolutely don't understand why it's happening. I'm using USBTiny ISP programmer, and it works great (I can upload bootloaders, change fuses) until I solder RFM69 chip (I tried with both RFM69W and RFM69CW). If I have bootloader loaded prior to adding RFM chip, I have no issues using board and upload sketches via FTDI. But as soon as I try uploading bootloader, it bricks MCU. It no longer accepts serial programming
Schematic is very similar to Moteino... I tried uploading different bootloaders to Moteino R2 and it worked fine.
I found few more people reporting same issue with 8Mhz bootloader and RFM chip.
Oh and it gets even more sad, as I'm using SMD chip, so no hope of recovering them with parallel programmer