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Bosch Sensortec |
Module descriptions
4.6.1
Main switch
The switch controls the connection between the power source (battery or USB) and the power regulation domains.
4.6.2
Programmable push buttons
Two programmable push buttons are connected to Ground individually through a 360ohm resistor. It is expected that
the internal pull-ups of the microcontroller pins connected to the buttons are enabled to use the button with a falling-
edge active-low configuration. The buttons are named BTN-T1 and BTN-T2.
4.6.3
Debugger connector
This connector helps with recovery of a board with a corrupted nRF52840 while loading custom applications or similar.
Debugging is possible with the connection of a Serial-Wire-Debug interface connector.
Figure 4: Debugger connector
Pin
Name
index
1
Vcc/Vref
3
Gnd
5
Gnd
7
Key
9
Gnd Detect
4.6.4
Shuttle Board 3.0 connector
The Shuttle Board 3.0 connector allows for the connection of a Shuttle Board 3.0 to be able to prototype one or more
sensors (depending on the Shuttle Board 3.0). Details of the Shuttle Board 3.0 connector can be found under 5.
Modifications reserved | Data subject to change without notice
Arrow.com.
Downloaded from
Application Board 3.0 User Guide
Overview
Pin description
Table 1 Shuttle pin description
Description
Set to 1.8V when the main switch
is set to ON
Ground
Ground
Not connected
Ground
An ARM Cortex-M4 compatible debugger can be
connected using the standard ARM Cortex 10-pin, 2 row,
1.27mm pitch connector.
Pin
Name
Description
index
2
SWDIO
Data I/O pin
4
SWDCLK
Clock pin
6
SWO
Trace output pin
8
NC
Not connected
10
nRESET
Active low hardware Reset
10 | 24
Document number: BST-DHW-AN008-00
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