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DSCOVR Deep Space Climate Observatory spacecraft; The computer has a maximum clock rate of 33 MHz and a processing speed of about 35 MIPS. [2] In addition to the CPU itself, the RAD6000 has 128 MB of ECC RAM. [2] A typical real-time operating system running on NASA's RAD6000 installations is VxWorks. The Flight boards in the above systems have ...
The dynamic power (switching power) dissipated by a chip is C·V 2 ·A·f, where C is the capacitance being switched per clock cycle, V is voltage, A is the Activity Factor [1] indicating the average number of switching events per clock cycle by the transistors in the chip (as a unitless quantity) and f is the clock frequency.
The special purpose registers in the high half of the data address space are always visible. The data registers at 0xFx can be used to copy data between banks. RAM banks other than bank 0 have all 128 bytes available. The stack (addressed via the stack pointer) is always on bank 0, no matter how the S register is set.
In practice, the effect may be smaller because some CPU instructions use less energy per tick of the CPU clock than others. For example, when an operating system is not busy, it tends to issue x86 halt ( HLT ) instructions, which suspend operation of parts of the CPU for a time period, so it uses less energy per tick of the CPU clock than when ...
It has a core clock of 110 to 200 MHz and can process at 266 MIPS or more. [1] The CPU can include an extended L2 cache to improve performance. [3] The CPU can withstand an absorbed radiation dose of 2,000 to 10,000 grays (200,000 to 1,000,000 rads), temperatures between −55 °C and 125 °C, and requires 5 watts of power.
In 2006, a side channel attack was published [5] that exploited clock skew based on CPU heating. The attacker causes heavy CPU load on a pseudonymous server (Tor hidden service), causing CPU heating. CPU heating is correlated with clock skew, which can be detected by observing timestamps (under the server's real identity).
In computing, the clock rate or clock speed typically refers to the frequency at which the clock generator of a processor can generate pulses, which are used to synchronize the operations of its components, [1] and is used as an indicator of the processor's speed.
The frequency of the clock pulses determines the rate at which a CPU executes instructions and, consequently, the faster the clock, the more instructions the CPU will execute each second. To ensure proper operation of the CPU, the clock period is longer than the maximum time needed for all signals to propagate (move) through the CPU.