PCB Design

[khoitd1997]

Need to have:

• Reset switch to clear things like bonding details
• Don't use the nrf52 power output to supply the RTC, the RTC can handle voltage as low as 1.1V, have both use directly from the the coincell
• The user input switch need to go to both the laptop's normal power pin as well as the nrf52 input pin
• Need logic level converter to interface with user input switch, the laptop 3.3V is outside of the range of the NRF52 GPIO Max Voltage since the coin cell goes from 2.7V-3V and max GPIO is VDD + 0.3
• NRF52 PCB Layout Advices

[khoitd1997]

Dongle Material Files
RTC Dev Board

[khoitd1997]

Input High Voltage for nrf52832 is 0.7xVdd. For 3V Vdd, that will be 2.1V.