The ATSAMR30M Sensor Board operates with supply
voltage ranging from 1.8V(1) to 3.63V. Low Dropout Regulator (LDO)
selection/bypass header (J4) is used to select/bypass the LDO based on the need for 3.3V
supply.
Jumper positions for the following modes of power supply:
- LDO Bypass mode(2) –
Place the jumper cap between pins (1 and 2) of J4
- LDO Selection mode(3)
– Place the jumper caps between pins (1 and 3) and pins (2 and 4) of J4 as shown
in Figure 1.
Notes:
- 1.If the CryptoAuthentication™
device (ATECC608A) is mounted on the board, the minimum supply voltage
required to operate it is 2V.
- 2.LDO Bypass mode can be used
to avoid LDO current consumption for extending the battery life. This is the
preferred mode if the ATSAMR30M Sensor Board is
supplied with a 3V battery or 3.3V from a Click Board (FTDI Click
Board).
- 3.LDO Selection mode can be
used if the ATSAMR30M Sensor Board supplies
power to the connected Click Board, which needs 3.3V to operate.