Nordic Thingy:91™ includes a low-power accelerometer and a high-G accelerometer.
Figure 1. Low-power and high-G accelerometers schematic
When Nordic Thingy:91 is in low-power sleep mode, any user interaction will be detected by the low-power accelerometer. The accelerometer has an SPI interface and it can detect motion on three axes. By default, the INT2 line of the accelerometer is not connected to nRF9160. If you want to use the INT2 line, solder SB6.
For detecting shocks, Nordic Thingy:91 uses a high-G accelerometer. The accelerometer has an SPI interface, and it can detect motion on three axes. By default, the INT2 line of the accelerometer is not connected to nRF9160. If you want to use the INT2 line, solder SB5.
Figure 2. Low-power accelerometer and high-G accelerometer interrupt line 2 selection
Note: On Nordic Thingy:91 v1.4.0, by default,
P0.10 is connected to the nRF52_RESET line through
SB14. The nRF52840 P0.18 can be configured as a
regular General-Purpose Input/Output (GPIO) instead of RESET or SB14 should
be cut to avoid having the accelerometer reset nRF52840.