13.17.2 Temperature Supervisor

An integrated temperature sensor self-protects the device circuitry. If the temperature rises above the overtemperature shutdown threshold, all device functions are turned off except for those required to send a DE2 Fault message. A Fault will be generated and a DE2 Fault message will be sent. The functions required to send the DE2 Fault message will then be shut down if pin OE is set to a low level. Active operation resumes when the temperature has cooled down below a set hysteresis value and the Fault has been cleared by toggling the OE pin from a logic low to a logic high.

It is desirable to signal the host dsPIC DSC with a warning message before the overtemperature threshold is reached. When the Thermal Warning Temperature (T_WARN) set point is exceeded, the DE2 temperature warning will be sent to the host dsPIC DSC. The warning message has no effect upon driver operation. The host dsPIC DSC may then take appropriate actions to reduce the temperature rise.