FDC37B78X SMSC Corporation, FDC37B78X Datasheet - Page 112

• Manufacturer Part Number: FDC37B78X
• Description: Enhanced Super I/O Controller with ACPI Support/ Real Time Clock and Consumer IR
• Manufacturer: SMSC Corporation

write to the part will result in the part retaining
the data and subsequently reflecting it when the
part awakens.
powerdown may cause an increase in the power
consumption by the part. The part will revert
back to its low power mode when the access
has been completed.
Pin Behavior
This chip is specifically designed for systems in
which power conservation is a primary concern.
This makes the behavior of the pins during
powerdown very important.
The pins can be divided into two major
categories: system interface and floppy disk
Accessing the part during
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drive interface. The floppy disk drive pins are
disabled so that no power will be drawn through
the part as a result of any voltage applied to the
pin within the part's power supply range. Most
of the system interface pins are left active to
monitor system accesses that may wake up the
part.
System Interface Pins
TABLE 49 gives the state of the system
interface pins in the powerdown state.
unaffected by the powerdown are labeled
"Unchanged". Input pins are "Disabled" to
prevent them from causing currents internal to
the chip when they have indeterminate input
values.
Pins