6 Hardware description: Smart Remote 3 nRF52 product example
Doc. ID 4374_139 v1.1
Page 51
Figure 39: Location of SWD interface connector P1
Firmware update of Smart Remote 3 on page 56 describes how to connect and perform firmware upgrades
and debugging of the product example.
Important: Make sure that pin 1 on the P1 connector on the PCA20023 board is connected to pin 1 of
the connector on the programmer unit.
Table 6: SWD interface connector pin configuration
Pin Label Description
P1_1 VDD Reference voltage for programmer
P1_2 SWDIO Serial wire debug data
P1_3 GND Ground
P1_4 SWDCLK Serial wire debug clock
P1_5 GND Ground
P1_6 NC No connection
P1_7 NC No connection
P1_8 NC No connection
P1_9 GND Ground
P1_10 NC No connection
6.3.7 Digital microphones
The Smart Remote 3 product example is equipped with two digital output PDM microphones.
The microphones are configured so they can be used to sample stereo audio, but are by default set to mono
audio. The microphones are by default disconnected from the power supply and the interface connectors. To
connect to the development kit and enable power, solder bridge SB9, SB10, and SB11 must be shorted, see
Figure 40: Digital microphones schematic on page 52.
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