MEC1404 Datasheet, PDF (447/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
36.0 VBAT-POWERED RAM
36.1 Overview
The VBAT Powered RAM provides a 64 Byte Random Accessed Memory that is operational while the main power rail
is operational, and will retain its values powered by battery power while the main rail is unpowered.
36.2 References
No references have been cited for this feature.
36.3 Terminology
There is no terminology defined for this section.
36.4 Interface
This block is designed to be accessed externally via the pin interface and internally via a registered host interface.
FIGURE 36-1:
I/O DIAGRAM OF BLOCK
Host Interface
VBAT-Powered RAM
Power, Clocks and Reset
Signal Description
Interrupts
36.5 Signal Description
There are no external signals for this block.
36.6 Host Interface
The registers defined for the Keyboard Scan Interface are accessible by the various hosts as indicated in Section 36.11,
"Registers".
36.7 Power, Clocks and Reset
This section defines the Power, Clock, and Reset parameters of the block.
 2015 - 2016 Microchip Technology Inc.
DS00001956D-page 447