Seco Smarc CSM-B79 User Manual page 74

3.3.30 Buttons
On the CSM-B79 carrier board, there are four momentary pushbuttons (with contacts normally open) for the direct handling of SMARC
signals.
The first pushbutton, SW3, is placed on POWER_BTN# signal. Upon the pressure of this pushbutton, the SMARC
sequence.
The second pushbutton, SW4, is placed on RESET_IN# signal. Upon the pressure of this pushbutton, the SMARC
The third pushbutton, SW5, is placed on SLEEP# signal. Upon the pressure of this pushbutton, the SMARC
supported by the module).
The fourth pushbutton, SW15, is placed on LID# signal. Such a signal can be used by the SMARC
switch, like those used to detect opening / closure of the notebooks. Upon changes in LID # state, the OS could trigger the transition of the module from Working
to Sleep status, or vice versa.
All the above signals can be also remoted by using feature header CN45 (par.3.3.26)
In addition, it is possible to manage the LID# signal also using dedicated DIP Switch SW14, which also manages the TEST# signal (par.3.3.26)
3.3.31 Others configuration Jumpers
CN53 position SUS_S5
1-2 Normal working
2-3 Force _ALW voltages to enabled
CN62 position VIN_PWR_BAD#
1-2 Not controlled
2-3 VSMARC Power Good
CSM-B79
CSM-B79 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: A.R - Reviewed by S.R. - Copyright © 2021 SECO S.p.A.
SW14 Switch ON Position
1 LID Button Simulation
2 Test mode
CN53 jumper is is a 3-way jumper which allows to select between normal working mode or to disable the
control of _ALW rails through CARRIER_PWRON signal to make them behave as _DSW rails.
CN62 jumper is a 3-way jumper which allows to select if SMARC
by an on-board voltage detector, which checks when VSMARC power rail is good, or must be left
floating. This jumper can be used for its functionality (i.e. set in 2-3 position) only when the SMARC
module power in voltage VDD_IN value is set to 5V (7-8 position on CN8, par.2.3.3).
®
®
module will perform a power up / power down
®
module will perform a reset.
®
module will enter in a sleep state (if such states are
®
module to detect the opening / the closure of an external lid
OFF Position
Normal operation
Normal operation
®
Signal VIN_PWRBAD# must be controlled
module power management
®
74