User`s manual

BIOS SETUP MENU
3
Automatic
If the Automatic parameter is OFF, all other Power Management parameters have no
meaning.
When the Automatic parameter is ON, the Power Management proceeds as follows:
− after the high-low timeout selected time the CPU automatically reduces its clock
frequency and passes from High speed to Low speed (both frequencies can be
set through setup);
− once the CPU is in Low speed and no activity occurs after the programmed
timeout it enters the SUSPEND state. The CPU resumes operations when a
WAKEUP event occurs, or when the SCAN key is pressed;
− when the CPU is in SUSPEND and no WAKEUP event occurs after the programmed
time, it enters the OFF state through which all peripherals are disabled. The CPU
resumes operation only when pressing the SCAN key.
3.6.6 Activities
If the Power Management - Automatic parameter is selected OFF, all Activities
parameters have no meaning. The primary activities cause the CPU to pass to High
speed, while the secondary ones allow the CPU to stay in Low speed if it is already in
this state (see par. 3.6.5). The value OFF indicates that activity on the device has no
effect on the CPU.
ITEM VALUES DESCRIPTION
Com 1 Off
Primary (*)
Secondary
Indicates the level of activity for the
UART/IR interface.
CF Off (*)
Primary
Secondary
Indicates the level of activity for the
radio frequency module.
LCD Off
Primary (*)
Secondary
Indicates the level of activity for
video operations (excluding cursor
blink).
Keyboard Off
Primary (*)
Secondary
Indicates the level of activity for the
keyboard.
Disk Off
Primary (*)
Secondary
Indicates the level of activity for all
accesses to flash disk (boot and non-
boot).
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