Acer TM7300 Series Service Manual

Contents

Acer TM7300 Series Service Manual Manual pdf 37 page image

1-24Service GuideDevice Device ID AssignmentMTXC North Bridge 0 AD11PIIX4 ISA Bridge 1 AD18 (Function 0)PIIX4 IDE controller 1 AD18 (Function 1)PIIX4 USB controller 1 AD18 (Function 2)PIIX4 PM/SMBUS controller 1 AD18 (Function 3)PCI VGA(NM2160) 2 AD13PCI Cardbus controller A AD21PCI Ethernet (Am79C970A) (ACER Dock III) C AD23PCI CardBus (TI 1131) (ACER Dock V) C AD231.6.7 Power ManagementPower Management in this design is aimed toward the conservation of power on the device andsystem level when the devices or system is not in use. This implies that if any device is detected asnot active for a sustained period of time, the device will be brought to some lower power state assoon as practicable.With the exception of thermal management, if a device has a demand upon it, full performance andbandwidth will be given to that device for as long as the user demands it. Power managementshould not cause the user to sacrifice performance or functionality in order to get longer battery life.The longer battery life should be obtained through managing resources not in use.Pathological cases of measuring CPU speed or trying to periodically check for reaction time ofspecific peripherals can detect the presence of power management. However, in general, since thedevice I/O is trapped and the device managed in SMI, the power management of devices should beinvisible to the user and the application.Thermal management is the only overriding concern to the power management architecture. Bydefinition, thermal management only comes into play when the resources of the computer are usedin such a way as to accumulate heat and operate many devices at maximum bandwidth to create athermal problem inside the unit. This thermal problem indicates a danger of damaging componentsdue to excessively high operating temperatures. Hence, in order to maintain a safe operatingenvironment, there may be occasions where we have to sacrifice performance in order to achieveoperational safety.Heuristic power management is designed to operate and adapt to the user while the user is using it.It is the plug and play equivalent for power management. There are no entries in BIOS Setup whichare required to be set by the user in order to optimize the computers battery life or operation. Theonly BIOS Setup entries are for condition information for suspend/resume operations. Normaloperations and power management are done automatically. (see chapter 3 for details).Since the power management is implemented by linking with APMinterface closely, the APM function in Win95 or Win3.1 must beenabled and set to advanced level for optimum power managementand the driver that installed in system must be Acer authorized andapproved.