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MEC1322 Datasheet(PDF) 376 Page - Microchip Technology

Part # MEC1322
Description  Keyboard and Embedded Controller for Notebook PC
PDF  456 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MEC1322 Datasheet(HTML) 376 Page - Microchip Technology

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MEC1322
DS00001719D-page 376
 2014 - 2015 Microchip Technology Inc.
34.7.1
POWER DOMAINS
34.7.2
CLOCK INPUTS
No special clocks are required for this block.
34.7.3
RESETS
34.8
Interrupts
This block does not generate any interrupts.
34.9
Low Power Modes
The VBAT-Powered RAM automatically enters a low power mode whenever it is not being accessed by the EC. There
is no chip-level Sleep Enable input.
34.10 Description
The VBAT Powered RAM provides a 64 Byte Random Accessed Memory that is operational while VCC1 is powered,
and will retain its values powered by VBAT while VCC1 is unpowered. The RAM is organized as a 16 words x 32-bit
wide for a total of 64 bytes.
TABLE 34-1:
POWER SOURCES
Name
Description
VCC1
The main power well used when the VBAT RAM is accessed by the EC.
VBAT
The power well used to retain memory state while the main power rail is
unpowered.
TABLE 34-2:
RESET SIGNALS
Name
Description
VBAT_POR
This signal resets all the registers and logic in this block to their default
state.
FIGURE 34-2:
VBAT RAM BLOCK DIAGRAM
VBAT Powered RAM
EC Interface
This interface is
only operational
when main
power is
present



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