Removing the clock signal from an inactive synchronous circuit
For other uses, see Clock incident (disambiguation).
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In computer architecture, clock gating is a popular power management technique used in many synchronous circuits for reducing dynamic power dissipation, by removing the clock signal when the circuit, or a subpart of it, is not in use or ignores clock signal. Clock gating saves power by pruning the clock tree, at the cost of adding more logic to a circuit. Pruning the clock disables portions of the circuitry so that the flip-flops in them do not switch state, as switching the state consumes power. When not being switched, the switching power consumption goes to zero, and only leakage currents are incurred.[1]
Although asynchronous circuits by definition do not have a global "clock", the term perfect clock gating is used to illustrate how various clock gating techniques are simply approximations of the data-dependent behavior exhibited by asynchronous circuitry. As the granularity on which one gates the clock of a synchronous circuit approaches zero, the power consumption of that circuit approaches that of an asynchronous circuit: the circuit only generates logic transitions when it is actively computing.[2]
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gating logic will change the clock tree structure, since the clockgating logic will sit in the clock tree. Clockgating logic can be added into a design...
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every cycle. To save energy, clockgating temporarily shuts off part of the tree. The clock distribution network (or clock tree, when this network forms...
Other potential clock domain crossing design errors include glitches and data loss. In some cases, clockgating can result in two clock domains where the...
leakage power, power gating has the benefit of enabling Iddq testing. Power gating affects design architecture more than clockgating. It increases time...
The Shepherd GateClock (51°28′41″N 0°00′05″W / 51.4779315°N 0.0014052°W / 51.4779315; -0.0014052 (Shepherd GateClock)) is mounted on the wall outside...
with the switching of unneeded components is called clockgating, which involves turning off the clock signal to unneeded components (effectively disabling...
A clock or chronometer is a device that measures and displays time. The clock is one of the oldest human inventions, meeting the need to measure intervals...
factor. Power gating is a commonly used circuit technique to remove leakage by turning off the supply voltage of unused circuits. Power gating incurs energy...
a single integrated chip; low-κ dielectric, etc. Power gating techniques such as clockgating and globally asynchronous locally synchronous, which can...
processing Coherency Granule, usually the size of a CPU cache line Clockgating, a way to lower clock tree power in an integrated circuit Centigram (cg), a unit...
International Composers' Guild International Cinematographers Guild Integrated clockgating, in logic chips This disambiguation page lists articles associated with...
Azuro's technology allows clockgating and clock network implementation to be combined as a single step, allowing the clock to be prevented from reaching...
{\displaystyle T_{J}} ), is imminent, measures such as clockgating, clock stretching, clock speed reduction and others (commonly referred to as thermal...
consumption. In the attempt to control the leakage power, high-k metal-gates and power gating have been common methods. Dynamic voltage scaling is another related...
Activation on the incidence of a clock signal, see Clockgating This disambiguation page lists articles associated with the title Clock incident. If an internal...
next clock, are allowed to propagate through the ALU and to the destination register while the CPU waits for the next clock. When the next clock arrives...
performances. In 1907 a clock was placed on the roof of the gate, and in 1908 an ornate clock tower was built on top of Jaffa Gate historical gate tower. Apart from...
accelerators offloading common algorithms such as AES and SHA-3. Increased clockgating and reworked microarchitecture at every stage, together with the fuse/prefix...
hit time in cycles. If a TLB hit takes 1 clock cycle, a miss takes 30 clock cycles, a memory read takes 30 clock cycles, and the miss rate is 1%, the effective...
center in Baroque Gate]. Politika (in Serbian). Branka Vasiljević (27 September 2020). Часовници - незаменљиви мериоци времена [Clocks - irreplaceable measurers...