MDBT50Q-1MV2 Digikey Datasheet
Implementation Details on Page 35-36
- Needs deciphering
- ext crystal is allowing LDO or DC-DC converter onboard module to work, this reduces power consumption slightly, needs evaluation if it’s worth… fairly small component count but idk what the impact is.
NFC?
- Research on antenna requirements needed
- Research on capabilities needed
- Use for anything other than pairing?
- Digital wallet (in the far future)?
- Cloning hotel keys?
For Our specific implementation
- Ensure pins used for all buttons are interrupt capable (not all NRF52840 pins are)
- Breakout SWDIO and SWDCLCK
- Check if module has USB isolator/protection, if not add TVS(?) diode
- Try to only use outside pins, which would allow us to delete inner pads except GND pads from footprint → better soldering experience + easier routing