Wednesday, December 7, 2016

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How Your Computer Displays Correct Time When Turned On After Years?


THE RTC CHIP REMEMBERS THE DATE AND TIME.

This timekeeper chip is called the Real-time Clock (RTC) or the CMOS ( Complementary Metal-oxide Semiconductor) chip. The CMOS chip (known as CMOS RAM) is a memory which also stores the BIOS information of the computer. And it is a volatile memory, that’s why It is driven by a low voltage battery having a life of around five to ten years. On desktop computers, the battery looks like a silver colored coin.

The RTC chips come in a compact form, often not user-replaceable, in newer computers including laptops. In fact, the need for such chips in machines is declining as high-speed connectivity is being adopted at a tremendous rate. The computers can easily sync time using the internet. Single board computers like the Raspberry Pi don’t feature a real-time clock chip.

Single board computers like the Raspberry Pi don’t feature a real-time clock chip. Other compact devices mobile phones have the real-time clock built on the chip itself but maybe without a battery in order to save space. The RTC is then powered by the mobile phone’s main battery. That’s the reason the time on your mobile resets when you remove the battery.

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