MEC1404 Datasheet, PDF (309/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
21.0 RTC/WEEK TIMER
21.1 Introduction
The RTC/Week Alarm Interface provides two timekeeping functions: a Week Timer and a Sub-Week Timer. Both the
Week Timer and the Sub-Week Timer assert the Power-Up Event Output which automatically powers-up the system
from the G3 state. Features include:
• EC interrupts based on matching a counter value
• Repeating interrupts at 1 second and sub-1 second intervals
• System Wake capability on interrupts, including Wake from Deep Sleep.
21.2 Interface
This block’s connections are entirely internal to the chip.
FIGURE 21-1:
I/O DIAGRAM OF BLOCK
RTC/Week Timer
Host Interface
Clocks
Resets
Interrupts
Signal Description
21.3 Signal Description
TABLE 21-1: SIGNAL DESCRIPTION TABLE
Name
BGPO
Direction
OUTPUT
Description
Battery-powered general purpose output
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DS00001956D-page 309