Advantech PCA-6275 manual Watchdog timer output J2, Cmos clear J4

1.8.3 Watchdog timer output (J2)

The PCA-6275 contains a watchdog timer that will reset the CPU or send a signal to IRQ11 in the event the CPU stops processing. This feature means the PCA-6275 will recover from a software failure or an EMI problem. The J2 jumper settings control the outcome of what the computer will do in the event the watchdog timer is tripped.

Table 1-4: Watchdog timer output (J2)

Function Jumper setting

IRQ11 1-2 closed

1

Reset 2-3 closed

1

1.8.4 CMOS clear (J4)

The PCA-6275 CPU card contains a jumper that can erase CMOS data and reset the system BIOS information. Normal- ly this jumper should be set with pins 1-2 closed. If you want to reset the CMOS data, set J4 to 2-3 closed for just a few seconds, and then move the jumper back to 1-2 closed. This procedure will reset the CMOS to its default setting.

Table 1-5: CMOS clear (J4)

Function Jumper setting

Keep CMOS data 1-2 closed

1

Clear CMOS data 2-3 closed

1

Chapter 1 Hardware Configuration 13