Specifications

Hardware Technical Specification
5-31
6 POWER MANAGEMENT
6.1 System power plane
Power Group Power Control
Pin
Controlled Devices
+12V VSUS_ON Other Control
+5V SUSB_ON LCD, Flash, Flash & Wlan LED, Fan, Camera, Codec,
Audio, SB
+3V SUSB_ON NB IO, SB, LCD, Card reader, Codec, Audio
+1.8V_DUAL SUSC_ON NB, DDR2 power
+5VSB VSUS_ON SB, USB, Charge & Power LED
+3VSB VSUS_ON SB, Audio, Clock Generator, PCIE interface
+1.5V SB Core, NB Core
+2.5V SB Core, NB Core, Onboard VGA
+VTT_DDR DDR2 Power
VCORE H_CPURST# CPU power
+3VA LCD, EC, BIOS, Keyboard
+VCC_RTC ICH6-M(RTC)
+VCCP CPU_VRON CPU power, SB Core, NB Core
6.2 Power management mode
6.2.1 Full-On mode
All system devices are not power managed and the system can respond to applications with maximum
performance.
6.2.2 Doze mode
The CPU clock is slow down but all other devices are full on.
6.2.3 Stand by mode
A suspend state where all motherboard components are still powered-on except for the system clock
generator device. The PCI and CPU buses are driven to the inactive idle state. The system memory is
powered and refreshed by the memory bridge, and the graphics frame buffer is powered and refreshed
by the graphic chip. The system provides a 32KHz clock (SUSCLK) in this suspend mode to support
refresh of these memory subsystems. Only an enabled “resume event” can bring the system out of the
stand by state. The south bridge also provides a resume timer that allows the system to resume after a
programmed time has elapsed.
6.2.4 Suspend to RAM mode (STR)
A suspend state where all motherboard components are powered-off. The CPU and PCI busses are
powered off. All devices connected to the CPU and PCI busses must either be powered-off or isolate
their bus interfaces. The system memory is powered and refreshed by the memory bridge, and the
graphics frame buffer is powered and refreshed by the graphics chip. The system provides a 32 kHz