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FIBOCOM SC138-
NA
Series Hardware Guide
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Figure 3-6 Startup timing sequence
3.2.1.2
Startup
Normal shutdown: When the machine is turned on, pull down KEY_PWR_N pin for more than 0.5s, and
then a checkbox will pop up in the display interface (choose shutdown or restart).
Forced shutdown: Pull down KEY_PWR_N for 9s-15s, and then the system will be forced to shut down.
The forced shutdown timing sequence is shown in the following figure:
Figure 3-7 Shutdown timing sequence
In case of system abnormality or crash, the modules can be forced to shut down. Generally, use
the normal shutdown mode; otherwise, data loss and other abnormalities may occur.
3.2.1.3
Sleep/Wakeup
Modules are in the standby mode, pull down KEY_PWR_N pin for 0.1s, and then the modules will enter
the sleeping status. The system supports automatic sleeping, and the time from the standby status to the
V B A T
KEY_PWR_N
VREG_L9A_1P8
2s t 8s
Other VREGs
KEY_PWR_N
VREG_L9A_1P8
9s t 15s
Other VREGs
V B A T
Note:
