Motorola CPV5300 CompactPCI, Installation Manual

Page: 17 / 78

Special Functions
1-5
1
Special Functions
The CPV5300 uses these functions designed for use in certain
applications:
❏
Watchdog Timer
The watchdog timer can operate in four modes:
– Disabled
– Set a flag in a register in ISA I/O memory map
– Set a flag in a register in ISA I/O memory map + Assert a
selectable interrupt (ISA, NMI, SMI, SCI)
– Set a flag in a register in ISA I/O memory map + Assert NMI
followed by a system reset
You can program the watchdog timer via registers in the ISA I/O
memory map. The watchdog timer is protected from being
accidentally enabled. The timer supports a range of count down
time-outs from 17.8ms to 4.86 minutes.
❏
Advanced System Monitoring
The CPV5300 monitors the following system events:
– On-card temperature
– Enclosure fan under speed
– MMC2 thermal fault
– On-card vo5V, +3.3V, +/-12V and the processor core
voltage
– System Management Bus (SMBUS) alert signal
– Chassis power supply loss of regulation
– Chassis intrusion
Fault status information is available to the system through a register
mapped in the ISA I/O space. You can also select events to generate
System Management Input (SMI), Non-Maskable Interrupt (NMI),
Interrupt Request (IRQ) or System Management Bus Alert (SMBUS)
interrupt signals and an external alarm signal.