SIO1007 datasheet(13/108 Pages) MICROCHIP

13 / 108 page

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DS00002020A-page 13

SIO1007

The GPIOs that are used for PME wakeup inputs are GP10-GP17, GP20-GP24, GP30-GP37. These GPIOs function

as follows:

• Buffers are powered by VCC, but in the absence of VCC they are backdrive protected (they do not impose a load

on any external VTR powered circuitry). They are wakeup compatible as inputs under VTR power. These pins

have input buffers into the wakeup logic that are powered by VTR.

All GPIOs listed above are for PME wakeup as a GPIO function (or alternate function).

See the table in the GPIO section for more information.

The following list summarizes the blocks, registers and pins that are powered by VTR.

• PME interface block

• Runtime register block (includes all PME, SMI, GP data registers)

• Pins for PME Wakeup:

GPIOs (GP10-GP17, GP30-GP37)

IO_PME#

nRI1, IRRX2

5.5

Maximum Current Values

See the Operational Description section for the maximum current values.

The maximum VTR current, ITR, is given with all outputs open (not loaded), and all inputs in a fixed state (i.e., 0V or

3.3V). The total maximum current for the part is the unloaded value PLUS the maximum current sourced by the pin that

is driven by VTR. The pin that is powered by VTR (as output) is IO_PME#. This pin, if configured as a push-pull output,

will source a minimum of 6mA at 2.4V when driving.

The maximum VCC current, ICC, is given with all outputs open (not loaded), and all inputs in a fixed state (i.e., 0V or

3.3V).

5.6

Power Management Events (PME/SCI)

The SIO1007 offers support for Power Management Events (PMEs), also referred to as System Control Interrupt (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. See the PME Support section.

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