Trickle Power Functionality
When the FDC37M81x is running under VTR
only, the PME wakeup events are active and (if
enabled) able to assert and nIO_PME pin active
low. The following lists the wakeup events.
• UART1 Ring Indicator
• UART2 Ring Indicator
• Keyboard data
• Mouse data
Maximum Current Values
Refer to the “Operational Description” section
for the maximum current values.
The maximum VTR current, ITR, is given with all
outputs open. The total maximum current
for the part is the unloaded value PLUS the
maximum current sourced by all pins that are
driven by VTR.
The maximum VCC current, ICC, is given with all
outputs open (not loaded).
Power Management Events (PME/SCI)
The FDC37M81x offers support for Power
Management Events (PMEs), also referred to as
System Control Interrupts (SCI) events. The
terms PME and SCI are used synonymously
throughout this document to refer to the
indication of an event to the chipset via the
assertion of the nIO_PME output signal on pin
4. See the “PME Support” section.
13