E_\mathrm{stored}

The aftereffect of calefaction amusement on accompaniment change is to absolute the bulk of ciphering that may be performed on a accustomed ability budget. While accessory abbreviating can abate some abject capacitances, the amount of accessories on an integrated-circuit dent has added added than abundant to atone for bargain capacitance in anniversary alone device. Some circuits – activating logic, for archetype – crave a minimum alarm amount in adjustment to action properly, crumbling "dynamic power" even if it has annihilation to do. Added circuits – a lot of famously, the RCA 1802, but aswell abounding after chips such as the WDC 65C02, the 80C85, the Freescale 68HC11 and some added CMOS chips – use "fully changeless logic" that has no minimum alarm rate, but can "stop the clock" and authority their accompaniment indefinitely. If the alarm is chock-full such circuits use no activating ability but they still accept a small, changeless ability burning acquired by arising current.

As circuits shrink, subthreshold arising accepted becomes added important. This arising accepted after-effects in ability consumption, even if no switching is demography abode (static ability consumption); with avant-garde chips, this accepted is frequently added than 50% of ability acclimated by the IC.