Advantech PCA-6359 user manual Clear CMOS J1, Watchdog output J2

1.6.1 Clear CMOS (J1)

Warning: To avoid damaging the computer, always turn off the power supply before setting "Clear CMOS". Set the jumper back to normal before turning on the power supply.

To clear the RTC data:

1.Turn off the computer and unplug the AC power.

2.Short the 2-3 pins.

3.Hold down <Delete> during boot-up and enter the BIOS setup to re-enter your preferences.

Table 1-1: Clear CMOS (J1)

*Normal CMOS data clear

J1

1

1

* default setting

1.6.2 Watchdog output (J2)

An onboard watchdog timer reduces the chance of disruptions which EMP (electro-magnetic pulse) interference can cause. This is an invaluable protective device for standalone or unmanned applications. Setup involves two jumpers and running the control software. (Refer to Appendix A.)

When the watchdog timer is enabled and the CPU shuts down, the watchdog timer will automatically either reset the system or generate an interrupt on IRQ 11, depending on the setting of jumper JP4, as shown below:

10 PCA-6359 Series User's Manual