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CS5535 데이터시트(PDF) 166 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
부품명 CS5535
상세설명  Geode??CS5535 I/O Companion Multi-Function South Bridge
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Revision 0.8
PMC Functional Description (Continued)
4.17.5 PMC Power Management Events
A large number of inputs to the PMC are used to monitor
and create system power managements events. Some of
these inputs apply the Working state machine while the
remainder apply to the Standby state machine.
4.17.5.1 PM Sleep Events
• Sleep:
— Sleep sequence initiated by software
• Wakeup:
— Assertion of the Sleep Button (SLEEP_BUT)
— Assertion of the Power Button (PWR_BUT#)
—RTC alarm
— Working power domain PMEs
— Standby power domain PMEs
4.17.5.2 PM Standby Events
• Standby:
— Sleep sequence initiated by software
— LVD detection of low voltage on VCORE (system fault)
— Assertion of the Power Button for 4 seconds
(PWR_BUT#, system fault)
— Thermal Alarm (THRM_ALRM#, system fault)
— Low battery (LOW_BAT#, system fault)
— Hardware reset (system restart)
— Software initiated reset (system restart)
—
Shutdown initiated reset, CPU triple fault (system
restart)
— Watchdog initiated reset (system restart)
— GLCP software initiated reset (system restart)
— Bad packet type reset (system restart)
— Reset Standby state machine RESET_STAND#
(Standby)
• Wakeup:
— Assertion of the Power Button (PWR_BUT#)
—RTC Alarm
— Standby power domain PMEs
Table 4-35 provides a complete list of the power manage-
ment inputs and describes their function. The system can
only be in one of three states: Working, Sleep, or Standby.
The activity of the inputs is to move the system from one
state to another.
Table 4-35. PM Events and Functions
Event
Current
State
Function
The following events are Sleep and/or Standby wakeup events (except for ACPI Timer).
PWR_BTN#
(also serves as a
Standby event)
Working
Sets the status bit (PWRBTN_STS) in PM1_STS (ACPI I/O Offset 00h[8] = 1).
If PWRBTN_EN is enabled (ACPI I/O Offset 02h[8] = 1), an SCI is generated.
Sleep
Sets the status bit (PWRBTN_STS) in PM1_STS (ACPI I/O Offset 00h[8] = 1).
If PWRBTN_EN is enabled (ACPI I/O Offset 02h[8] = 1), SCI generation and wakeup
from this event is enabled (i.e., sets the WAK_STS bit, ACPI I/O Offset 00h[15] = 1).
Standby
Sets the status bit (PWRBTN_STS) in PM1_STS (ACPI I/O Offset 00h[8] = 1).
If PWRBTN_EN is enabled (ACPI I/O Offset 02h[8] = 1), SCI generation and wakeup
from this event is enabled (i.e., sets the WAK_STS bit, ACPI I/O Offset 00h[15] = 1).
SLP_BTN
Working
Sets the status bit (SLPBTN_STS) in PM1_STS (ACPI I/O Offset 00h[9] = 1).
If SLPBTN_EN is enabled (ACPI I/O Offset 02h[9] = 1), an SCI is generated.
Sleep
Sets the status bit (SLPBTN_STS) in PM1_STS (ACPI I/O Offset 00h[9] = 1).
If SLPBTN_EN is enabled (ACPI I/O Offset 02h[9] = 1), SCI generation and wakeup
from this event is enabled (i.e., sets the WAK_STS bit, ACPI I/O Offset 00h[15] = 1).
RTC Alarm
Working
Sets the status bit (RTC_STS) in PM1_STS (ACPI I/O Offset 00h[10] = 1).
If RTC_EN is enabled (ACPI I/O Offset 02h[10] = 1), an SCI is generated.
Sleep
Sets the status bit (RTC_STS) in PM1_STS (ACPI I/O Offset 00h[10] = 1).
If RTC_EN is enabled (ACPI I/O Offset 02h[10] = 1), SCI generation and wakeup
from this event is enabled (i.e., sets the WAK_STS bit, ACPI I/O Offset 00h[15] = 1).
Standby
Sets the status bit (RTC_STS) in PM1_STS (ACPI I/O Offset 00h[10] = 1).
If RTC_EN is enabled (ACPI I/O Offset 02h[10] = 1), SCI generation and wakeup
from this event is enabled (i.e., sets the WAK_STS bit, ACPI I/O Offset 00h[15] = 1).
ACPI Timer
(internal timer)
Working
Sets the status bit (TMR_STS) in PM1_STS (ACPI I/O Offset 00h[0] = 1).
If TMR_EN is enabled (ACPI I/O Offset 02h[0] = 1), an SCI is generated.



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