Understanding CMOS Battery - What is CMOS? CMOS stands for Complementary Metal Oxide Semiconcuktor, a battery used by the BIOS to remain active in the absence of electricity, the type of semi-conductor chip that stores data without requiring an external power source.
How it Works CMOS
used to store the configuration program, the diagnostic program and update the file creation date and time will not be lost even if the computer is turned off.
important characteristics of CMOS is he breathed high immunity and low static power consumption. Power is only drawn when the transistors in a CMOS switch between the living and the dead. Consequently, CMOS devices do not cause heat as much as other logic circuits, such as transistor-transistor logic (TTL) or NMOS logic, which only uses the n-type devices without p-type. CMOS also allows the logic chip with high density are made.
When the computer's power supply ignited, CMOS runs a series of checks to make sure the system is functioning properly. One examination included counting the use of random access memory (RAM). Because of this delay boot time, so some people disable this feature in the CMOS settings, opting for a quick boot. If installing new RAM it is better if it is switched out until the RAM has been checked properly then deactivated
After the POST is completed, CMOS check other settings. Checking Hard disk formats and configuration Redundant Array of Independent Disks (RAID), boot preferences, the presence of peripherals, and overclocking tweaks. Many settings can be manually changed the CMOS configuration to improve performance. However, these changes should only be performed by experienced users. Changing the settings carelessly can make the system unstable, cause crashes, or even prevent the computer from booting.
CMOS configuration can be accessed during the POST phase of boot up, by pressing a certain button before the operating system initializes. Usually using Del key but others may be another motherboard also used. There is also the option to protect CMOS settings by requiring a password to change the setting. The changes will be saved upon exit by pressing the F10 key, and then reboot the computer to use the new settings.
Most motherboards provide the user a list of all the options available in CMOS. It is noteworthy that this will vary according to motherboard design and BIOS manufacturer. Two of the most famous producers BIOS is Phoenix and Award, while companies like Dell and Compaq produce their own BIOS chips.
Storing data without the need for external power
Powering the BIOS
Saving BIOS configuration
Error In CMOS:
A message appears on the screen that there are problems in CMOS When we turn on the computer warned that pressing F2 is menenjukan that bateray CMOS is already so weak that needs to be replaced.
Nothing displayed on the monitor. To overcome the above we can malakukan initial repair by replacing the new CMOS, and if the message still appears the possibility of trouble lies in a CMOS chip that is less true, try to memperbaikainya.
CMOS Battery Characteristics
The main characteristics of the CMOS is, using only CMOS power consumption is required, in the sense of a CMOS sensor using only a small force compared to the other image sensor.