Chapter 3 | Hardware |
•4th state is a hibernate or
In this state there are no internal operations taking place, except for the internal RTC. This includes no activity for the RAM, CPU,
♦To enter a hibernate or
♦To exit this sleep state a wake up event, such as the
•5th state is the normal power Off or shutdown (S5).
All activity stops except the internal clock, unless the power cord is removed from the power source.
♦To go to a fully powered down state (soft off), the XTX 820 must either be powered On, or in a sleep state, and then the
♦To go to a fully powered up state, press the
The OS may provide additional programming features to change the activation time for each state, and to shutdown or transition the XTX 820 at certain times. Refer to the OS vender’s documentation for power management under the ACPI standard.
Wake Up Activities
The wake up events listed in Table
Table
Signal/Device | Condition |
SMBALRT* | When set to Always |
|
|
GEP2* (RI*) | If this pin is configured as Sleep button in BIOS Setup. |
|
|
GEP1* | If this pin is configured as a LID switch in BIOS Setup and used to transition |
| to S3. A release of this signal wakes the system from S3. |
PCE_WAKE* | When set to Always |
|
|
Integrated LAN | The LAN driver configuration allows the system to wake from S3/S4 and |
| even S5 through direct addressing, magic packets, or link status changes. |
PS/2 Keyboard & | If powered by standby voltage on baseboard. |
Mouse |
|
Integrated USB | If configured as S3/S4 wake device in BIOS Setup and if powered by |
| standby voltage. Example, USB mouse could wake the system. |
PME* | Activated by Windows ACPI system if the PCI driver indicates that it |
| manages a device capable of waking up the system. |
Note: The signals marked with * = Negative true logic.
60 | Reference Manual | XTX 820 |