Turn On Procedure Of Pic Firmware; Turn Off Procedure Of Pic Firmware - Advantech ARK-1388V User Manual

4.2

Turn on procedure of PIC firmware

If the power mode of the ARK-1388V is set as general purpose IPC mode, the sys-
tem will turn on when the power button pushed and power input is live. When the
power mode of the ARK-1388V is set as in-vehicle mode, the turn on and turn off pro-
cedure will be controlled by PIC firmware. The turn on procedure of PIC firmware is
shown in Fig 4.2. Firstly, the PIC firmware will automatically check the voltage level of
the input battery power. Then it will check the battery status. The battery status is nor-
mal if the input voltage is higher than 11V in a 12V system or 22V in a 24V system.
Next, the IGN status is determined by the voltage level of ignition signal which is
located at the third pin of power connector. If the voltage of IGN is higher than 8V, the
IGN status is high. The system will be turned on after 10 seconds, named turn-on
delay, if the IGN status is higher.
4.3

Turn off procedure of PIC firmware

ARK-1388V will start to shut down if the IGN signal goes lower than 8V. Then the sys-
tem will turn off after the time period named off delay. The off delay time is used for
an in-vehicle device, ARK-1388V, to store information or communicate with a device
on stations before it turns off. If the system hangs when shutting down or is still alive
longer than the time period named in hard off, then PIC firmware will force the system
to shut down right away to avoid consuming the battery power. The time period of off
delay and hard off can be set by the 4th to 6th pins on SW6. For more timing details
on the 4th to 6th pins on SW6, please refer to Table 2.9.
Figure 4.2 Turn on procedure of PIC firmware
Figure 4.3 Turn off procedure of PIC firmware
49 ARK-1388V User Manual