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Chapter 2 Installation 29
2.20 Watchdog timer configuration
An on-board 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 one jumper and running the control software (refer to
Appendix A).
2.20.1 Watchdog timer action (J2)
When the watchdog timer activates (CPU processing has come to a
halt), it can reset the system or generate an interrupt on IRQ11. This
can be set via setting J2 as shown below:
Table 2-14: Watchdog timer action (J2)
* System reset IRQ11
J2
* default setting
2.21 USB connectors (CN19)
The PCM-9570/S board provides two USB (Universal Serial Bus)
interfaces which gives complete plug and play, hot attach/detach for
up to 127 external devices. The USB interfaces comply with USB
specification rev. 1.0 and are fuse protected.
The USB interfaces are accessed through two 4-pin flat-cable
connectors, CN19. You will need an adapter cable if you use a
standard USB connector. The adapter cable has a 4-pin connector on
one end and an USB connector on the other.
The USB interfaces can be disabled in the system BIOS setup.
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