instruction cycle


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instruction cycle

[in′strək·shən ‚sī·kəl]
(computer science)
The steps involved in carrying out an instruction.

instruction cycle

The fundamental sequence of steps that a CPU performs. Also known as the "fetch-execute cycle," it is the process whereby a single instruction is executed. The first half of the cycle transfers the instruction from RAM to the instruction register (fetch) and decodes it. The second half executes the instruction. See machine language.
References in periodicals archive ?
The mAgic macro-assembler optimizer uses Atmel's patent-pending code compression scheme that results in code density of only 4-bits per floating point arithmetic instruction for numerically intensive operations, and average effective code density of 50-bits per stored VLIW instruction cycle, without loss of performance.
Specifications: Part Number TC9486F/XB series Package QFP100/FBGA144 Instruction Cycle 10ns (100 MIPS operation) Operating Clock PLL incorporated for DSP clock Processor 24bit x 24 bit + 51bit multiplier and adder, 51bit ALU Data Bus 24bit x 3 Data RAM 20k word Coefficient ROM 32k word Program ROM 24k word Program RAM 512 word Audio Interface 4 output ports, 2 input ports (2 ports of LRCK and BCK), independent SPDIF (IEC958) input/output MCU Interface Serial or I2C bus interface Operating Voltage 2.
Intended for use in a wide range of USB devices, the C161U moves data within peripherals at up to 10 times the rate of most competitive chips, thanks to its combination of superior speed, bandwidth, instruction cycle time and DMA (direct memory access).
Main Specifications Part Number TC9446F series Package QFP100 Instruction Cycle 15.
The PIC12CR509A features 1024 words of ROM program memory, 41 bytes of user RAM, six I/O pins with on-chip clock oscillator, 33 single-word instructions, full-speed 1 microsecond instruction cycle at 4 MHz, seven special function hardware registers, two-level deep hardware stack, 8-bit real time clock/counter with 8-bit programmable prescaler, watchdog timer, direct LED drive, low 2.