4.9 Power Management Interface Signals –Table 6
Name
Type
Description
BATLOW#
(Mobile Only) /
GPIO72
(Desktop Only)
I
Battery Low:
Mobile only signal is an input from the battery
to indicate that there is insufficient power to boot the system.
Assertion will prevent wake from S3–S5 state. This signal can
also be enabled to cause an SMI# when asserted.
Note:
Desktop requires a weak external pull-up
SYS_PWROK
I
System Power OK:
This generic power good input to the Ibex
Peak is driven and utilized in a platform-specific manner.
While PWROK always indicates that the CORE well of the
Ibex Peak is stable, SYS_PWROK is used to inform the Ibex
Peak that power is stable to some other system component(s)
and the system is ready to start the exit from reset. The
particular component(s) associated with SYS_PWROK can
vary across platform types supported by the same generation of
Ibex Peak. Depending on the platform, the Ibex Peak may
expect (and wait) for SYS_PWROK at different stages of the
boot flow before continuing.
NOTE:
Consult the platform design guide for instructions on
how to connect SYS_PWROK for that platform.
STP_PCI#
(Mobile Only)
/
GPIO34
(Desktop Only)
O
Stop PCI Clock:
This signal is an output to the external clock
generator for it to turn off the PCI clock. Mobile: Can be
configured as STP_PCI# Desktop: Hardware to GPIO mode.