Interfaces and Connectors
EPM-32 Reference Manual
44
CPU Temperature Monitor
A thermometer circuit constantly monitors the die temperature of the CPU. This circuit can be
used to detect over-temperature conditions which can result from fan or heat sink failure or
excessive ambient temperatures.
The system can be configured to generate a Non-Maskable Interrupt (NMI) when the temperature
exceeds the threshold.
The CMOS setup is used to set the temperature detection threshold. A status bit in the Special
Control Register bit D5 if I/O port 1D0h (or 1E0h), can be read to determine if the die
temperature is above the threshold.
Contact the factory for information on clearing the status bit or reading and writing to the
thermometer circuit. See page 47 for additional information.