EVK BMD-345 - User guide
UBX-19051533 - R01
Hardware description
Page 7 of 27
Figure 3: Schematic – Power supply
2.2
Reset
The BMD-345 module has a configurable hardware reset. P0.18 is assumed to be used as the reset
pin for all BMD-345 and Nordic example projects, and thus the evaluation board hardware is
configured to use P0.18 as a reset. The Reset button can be configured to connect to an input on the
interface IC or to directly connect to P0.18.
The reset button is connected to the IC used for the J-Link interface by default. Pressing reset while
the interface IC is powered will cause a momentary reset signal on the RESET_N output of the
interface IC, which is connected via solder jumper to P0.18 of the BMD-345 module. If the reset button
is held down during EVK power on, it will cause the interface IC to enter its bootloader mode, allowing
either SEGGER J-Link programmer firmware to be programmed.
When the reset button is directly connected to P0.18, it can be used as a fifth user button or as a reset
button directly connected to the BMD-345 module.
Solder jumper J18 is used to connect P0.18 of the BMD-345 module to the RESET_N net. RESET_N
is connected to the interface IC and to the reset connections on the Arduino headers.
