Switches, Buttons and Misc. Headers 7
miriac SBC-LX2160A User Manual
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© MicroSys Electronics GmbH 2021
7
Switches, Buttons and Misc.
Headers
7.1
Switches and Buttons
7.1.1 SW1 (Power Enable)
SW1 is not assembled. Functionallity is done by jumper ST49. If ST49 is closed,
power is ON, IF ST49 is open, power is off.
7.1.2 SW2 (Reset Button)
SW2 triggers a Hardware Reset of the MPX-LX2160A SoM when pressed. It is
connected to the reset input of two STM6905 reset supervisor ICs. The resulting
open drain reset signal is fed to the carrier and the SoM.
The following table shows the internal connections:
SW2
J6/J9
ST1
Microcontroller
Pin
Signal
Pin
Pin
Signal
Pin
Name
1 & 3
GND
2 & 4
RST-
BTN
→
1
8
→
RESIN#
→
52
PTC7
Table 7-1 Reset button pinout
7.1.3 SW3 (CAN Termination)
SW3 switches the on-board 120R termiation resistor for the CAN interface.
SW3-1 sets the termination for CAN1. SW3-2 sets the termination for CAN2.
If SW3-1/-2 is open, the CAN channel is unterminated.
7.1.4 SW4 (Clock Configuration)
This functionality is currently not supported and subject to future expansion of the
evaluation kit.
