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Special functions
The CPV5000 uses three functions that are designed for use in certain
applications. These are:
• Watchdog Timer
The watchdog timer is a count down timer. When the counter reaches
zero, it can set a flag in a register, optionally assert IOCHK (NMI), and
optionally perform an SBC reset.
• Temperature Monitoring (LM78)
Temperature monitoring monitors the CPV5000 for an over temperature
condition to a resolution of +/- 0.5
condition, a flag can be set in a register or an interrupt can be generated.
• System Monitoring (LM78)
The LM78 is a highly integrated data acquisition system for hardware
monitoring of a microprocessor-based system. On the CPV5000, the
LM78 monitors backplane and CPU voltage, CPU temperature (user
definable threshold), fan rotation (CPU, chassis), and intrusion with
status interrogated through local NMI or SMI.
Additional information resources
For additional information, go to these Web sites:
Motorola Computer Group:
http://www.mcg.mot.com
National Semiconductor (for LM78 Microprocessor system hardware monitor
specifications):
http://www.national.com
American Megatrends:
http://www.ami.com
Special functions
. On an over temperature
° C
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1-5
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