Figure 4 shows the BL654 development board Power Supply block.
Figure 4: BL654 development Kit power supply
There are five options for powering the development board:
▪ USB1 USB type micro-B connector – If it requires the FTDI USB1-UART (BL654) path
▪ USB2 USB type micro-B connector – If it requires the Atmel USB2-SWD (BL654) path
▪ USB3 USB type micro-B connector – If it requires the USB3 to USB (BL654) path
▪ External DC supply (2.5V-5.5VV), into DC jack connector (CON1),
▪ AAA batteries – Three AAA (4.5V) battery holder (J25) fitted on underside of development board
The external power sources are fed into selection switch SW4 which allows a selection between either USB sources or the
DC jack/AAA.
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