MEC1322 Datasheet, PDF (218/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
16.0 WATCHDOG TIMER (WDT)
16.1 Introduction
The function of the Watchdog Timer is to provide a mechanism to detect if the internal embedded controller has failed.
When enabled, the Watchdog Timer (WDT) circuit will generate a WDT Event if the user program fails to reload the WDT
within a specified length of time known as the WDT Interval.
16.2 References
No references have been cited for this chapter.
16.3 Terminology
There is no terminology defined for this chapter.
16.4 Interface
This block is designed to be accessed internally via a registered host interface or externally via the signal interface.
16.5 Host Interface
FIGURE 16-1:
I/O DIAGRAM OF BLOCK
Watchdog Timer (WDT)
Host Interface
Clock Inputs
Resets
WDT Event
The registers defined for the Watchdog Timer (WDT) are accessible by the embedded controller as indicated in Section
16.8, "EC-Only Registers". All registers accesses are synchronized to the host clock and complete immediately. Regis-
ter reads/writes are not delayed by the 32KHz_Clk.
DS00001719D-page 218
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