FDC37B78X 查看數據表（PDF） - SMSC -> Microchip

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FDC37B78X

Enhanced Super I/O Controller with ACPI Support, Real Time Clock and Consumer IR

SMSC -> Microchip 

write to the part will result in the part retaining

the data and subsequently reflecting it when the

part awakens. Accessing the part during

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

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. Pins

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.

112

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