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Very Large Scale Integration (VLSI)
Very Large Scale Integration (VLSI) is a technology used to fabricate integrated circuits (IC). The various stages of design, simulation, synthesis, timing analysis, layout and fabrication can be discussed in this category. It is a wide spread technology as most of the existing technologies are digital technologies and need an IC to implement. It is VLSI which made computer to be of the size of a pocket from the size of two rooms.
703 Questions
CMOS is a small component cluster on a computer motherboard which hold a very small amount of simple information. It has a large button battery which supplies the needed power to preform one of its main functions: Keep date and time. It also holds vital system settings.
Basicly, It is a small memory componant, but users can not store data on it aside from system boot settings.
What is VHDL program for 8 to 1 multiplexer?
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
entity mux8X1 is
Port ( en8 : in STD_LOGIC;
s3 : in STD_LOGIC_VECTOR (2 downto 0);
i : in STD_LOGIC_VECTOR (7 downto 0);
y8 : out STD_LOGIC;
y8l : out STD_LOGIC);
end mux8X1;
architecture Behavioral of mux8X1 is
begin
process(en8,s3,i)
begin
if(en8='0') then y8<='0';y8l<='1';
else
case s3 is
when "000" =>y8<=i(0);y8l<=not i(0);
when "001" =>y8<=i(1);y8l<=not i(1);
when "010" =>y8<=i(2);y8l<=not i(2);
when "011" =>y8<=i(3);y8l<=not i(3);
when "100" =>y8<=i(4);y8l<=not i(4);
when "101" =>y8<=i(5);y8l<=not i(5);
when "110" =>y8<=i(6);y8l<=not i(6);
when "111" =>y8<='i(7);y8l<=not i(7);
when others=>' null';
end case;
end if;
end process;
end Behavioral;
Its is the button battery that stores the BIOS settings for your computer.
What is the VHDL code to implement XOR gate in behavioral model?
Below code can implement OR gate in VHDL.
The code is written in behavioral model.
Library ieee;
use ieee.std_logic_1164.all;
Entity gates is
port (a,b : in std_logic; c : out std_logic);
end gates ;
architecture and1 of gates is
begin
process(a,b)
Begin
If (a=1 or b=1) then
C<='1';
Else
C<= '0';
End if;
End process;
End and1;
Which logic family dissipates the minimum power?
Cmos logic family, because it has no resistors attached who consume active power.
How do you locate the CMOS battery in a laptop?
I don't have experience with that exact model, but I have disassembled and repaired a few Sony laptops. From my experience the CMOS battery is usually located towards the back (if you were facing the screen in a normal situation) under the keyboard. Before starting you should have a good #0 and #00 Phillips screwdriver with a magnetized tip. To access the keyboard screws, you must first remove the top panel. Usually it's one screw on the side, then slide the panel to the side and lift up. Be careful of the ribbon cables for the speakers and power button. You should be able to see the keyboard screws. You may have to remove some shielding to get to the battery. Usually the "=>" marked screws. If the battery is not a button cell type like the typical CR2032, look for a two wire lead (red/black). Some cooling fan wires look similar to the CMOS battery leads. The pigtail type batteries are usually stuck to the main-board with foam double sided tape or Velcro The next step is trying to find the replacement battery without paying an arm and a leg.
What are the disadvantages of VLSI technology?
There is no specific disadvantage it is economically unreliable for very small lab trials, research and study purpose.
To know about the advantages of TTL logic family, one should have a basic idea about RTL, DTL etc. Diode logic (DL) uses diodes to implement logical functions like AND and OR. But the disadvantage is that it can not perform NOT operation. As AND and OR are not complete functions by themselves, they can not perform several logic functions without NOT. Hence, there was a need for some device which can perform a NOT function as diodes can not. That device is a transistor. Then came the DTL which uses a transistor along with diodes. As a transistor can act as an inverter, NAND (NOT-AND) & NOR (NOT-OR) operations can be performed. But this logic uses several diodes which will slow down its operation. Due to the delay offered by them, the logic levels may sometimes change i. e. 0 t0 1 or 1 to 0. Then came TTL. This logic uses a multi emitter transistor, a transistor with many emitter terminals. As every emitter is nothing but a diode, this logic eliminates the use of all diodes. This is the major advantage. As transistor becomes ON and OFF much rapidly than a diode, switching time will be faster. TTL, or Transistor-transistor logic replaced resistor-transistor logic, and used much less power. The TTL family is very fast and reliable, and newer faster, less power-consuming, etc. types are always being developed. = In TTL (Transistor-Transistor Logic), think that the device using this technology is made from several transistors. Another advantage is that many more chips employ this technology.
VLSI is Very Large System Integration
Today, instead of using vacuum tubes (which were used in electronic products a few decades ago), transistors are used. the biggest (but not the only) advantage of the transistors is the size - instead of having a vacuum tube that id 1-2 cm, a single transistor is around 40 nm (nano meter) - 25000000 times smaller!!!!
it means that one can create a very complex system, with tens of thousands of transistor, on a single chip that is in the size of 1x1 cm. In other words, one can integrate many complex modules in his system.
The problem is that when a human being is designing such a complicated system, there are many mistakes because of the system's complexity. Therefore, it takes a very careful process of checks and verifications when designing such a system
Standard TTL (which stands for Transistor-Transistor Logic) circuits operate on a 5V power supply. The typical level for a logical "0" is between 0V and 0.8V, and the typical level for a logal "1" is somewhere between 2.2V and 5V. Typically, a value little lower than Vcc (power source voltage) is used; in case of a 5V supply, this is usually around 4.5V, but TTL devices are built to withstand full Vcc as input, just in case.
Logic gates are transistor circuits, normally arranged on a silicon base and encapsulated inside an integrated circuit. (chip).
Using several transistors wired together, their inputs can be arranged such that, for given inputs, the output will only change state for certain conditions.
The transistor switches are in either of two states, 'on' and 'off'. These are logic states 1 & 0 (one or zero), hence binary.
The logic uses Boolean algebra.
NOT, means it is 'not on', = OFF. This is abbreviated in the descriptions as the letter 'N'
A simple AND gate, means that the output is at level zero until both inputs have a level 1 voltage on them.
A NAND gate is a 'Not And' gate. The result is reversed. The output is always at logic level 1 until both inputs also have a level 1 also.
What is the function of CMOS Battery Slot?
A slot on the motherboard intended to hold the CMOS battery.
What is the main logic family?
A logical family is a person who is logical to want you say or other word it is a family want consider your choice and think of it for you if it will destroy any future plans
A logical family also reason and give life guiders responses
to draw a conclusion
a logical family is a family that consider future chices so it can be good it future plans
a ogical family is a resonable group of people living other one roof in love inspite of all the battles the face.
What CMOS item can be password protected?
Yes. While the computer is booting up, keep pressing the escape key until it appears.
What is the VHDL code to implement NOR gate in behavioral model?
Below code can implement NAND gate in VHDL.
The code is written in data flow model.
Library ieee;
use ieee.std_logic_1164.all;
Entity gates is
port (a,b : in std_logic; c : out std_logic);
end gates ;
architecture and1 of gates is
begin
c<=a nand b;
end and1;
CMOS stands for Complimentary Metal-Oxide Semiconductor. It is the manufacturing technique used to create the main CMOS chip on your computer that stores the initial settings your computer uses to start up. In CMOS setup, you can change the date and time, boot order, boot device, implement security settings, as well as many other things.
When trouble shootig a computer why might you have to enter CMOS setup?
When you troubleshoot a computer, there are a number of reasons to enter CMOS setup. Here are some specific situations.
1. You may need to change the boot order. If you are having problems with the operating system and you need to install it, you will need to boot off of the installation media. If the machine is set to go directly to the C: drive, then the CD or DVD will never load. But you can change it to boot off of the CD/DVD drive first.
2. If the CMOS battery dies. If the battery dies and the settings become scrambled, then you'd need to enter the CMOS settings and fix everything after changing the battery.
3. If the computer locks up at random. It is possible that the memory is being clocked too fast or is using the wrong latency settings. In some cases, it may be because someone tried to overclock the CPU. So you can fix any wrong values that cause system instability.
4. If you add new hardware devices. You might have to enable a hard drive socket that was disabled. Or maybe you just installed a PCI-e, generation 3 card, but it won't enter generation 3 mode. The CMOS might have a setting to enable that.
What happens automatically after you exit CMOS setup main screen?
date time change and window starting problem
How is CMOS RAM able to hold data even when the power is off?
CMOS is not RAM. While it is memory, unlike main system RAM, CMOS is very tiny and only holds the BIOS configuration, nothing else. RAM is made from transistors and capacitors, which must be recharged. CMOS is made from several transistors wired as flip flops. It only needs a tiny amount of power to hold its data, and that comes from a small battery. If you remove the battery, it will lose everything.
What keeps the CMOS data current and up to date?
The data is CMOS is on a chip called RAM. RAM will lose data when it loses power. A small battery on the motherboard is used to keep continuous power to CMOS when the PC loses power.
What is the difference between fpga mplementation and verilog hdl implementation?
HDL means hardware description language. These are the computer programming languages used to describe hardware. By doing so one can virtually realize hardware and test it. Verilog HDL is one of several hardware description languages available.
How can we replace CMOS battery in a PC?
Most PC motherboards use a coin cell battery as a CMOS battery backup for BIOS settings. Most common battery used for this application is CR3032 and can be easily replaced. You can turn off the computer, remove power cables, open the machine and locate this coin cell on the motherboard and remove old battery from the socket with a plastic tool or your finger nails and then insert a new one in the socket. If using a metal tool/screw driver be careful that you do not short upper and lower side of the coin cell (which can cause a short circuit, can create a spark and will damage the battery).
