MEC1404 Datasheet, PDF (305/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
20.0 HIBERNATION TIMER
20.1 Introduction
The Hibernation Timer can generate a wake event to the Embedded Controller (EC) when it is in a hibernation mode.
This block supports wake events up to 2 hours in duration. The timer is a 16-bit binary count-down timer that can be
programmed in 30.5µs and 0.125 second increments for period ranges of 30.5µs to 2s or 0.125s to 136.5 minutes,
respectively. Writing a non-zero value to this register starts the counter from that value. A wake-up interrupt is generated
when the count reaches zero.
20.2 References
No references have been cited for this chapter
20.3 Terminology
No terms have been cited for this chapter.
20.4 Interface
This block is an IP block designed to be incorporated into a chip. It is designed to be accessed externally via the pin
interface and internally via a registered host interface. The following diagram illustrates the various interfaces to the
block.
FIGURE 20-1:
HIBERNATION TIMER INTERFACE DIAGRAM
Hibernation Timer
Host Interface
Clock Inputs
Resets
Interrupts
Signal Description
20.5 Signal Description
There are no external signals for this block.
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DS00001956D-page 305