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Mobile processor - Wikipedia
From Wikipedia, the free encyclopedia
Processor found in mobile devices
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This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources.
Find sources: "Mobile processor" – news · newspapers · books · scholar · JSTOR
(September 2021)
An Intel Pentium Mobile, clocked at 300 MHz (1998)

A mobile processor is a microprocessor designed for mobile devices such as laptops and cell phones.

A CPU chip is designed for portable computers to run fanless, under 10 to 15W, which is cool enough without a fan.[1] It is typically housed in a smaller chip package, but more importantly, in order to run cooler, it uses lower voltages than its desktop counterpart and has more sleep mode capability. A mobile processor can be throttled down to different power levels or sections of the chip can be turned off entirely when not in use. Further, the clock frequency may be stepped down under low processor loads. This stepping down conserves power and prolongs battery life.

In laptops

[edit]

One of the main characteristics differentiating laptop processors from other CPUs is low power consumption, which is not without tradeoffs: they also tend to not perform as well as their desktop counterparts.[2]

The notebook processor has become an important market segment in the semiconductor industry. Notebook computers are a popular format of the broader category of mobile computers. The objective of a notebook computer is to provide the performance and functionality of a desktop computer in a portable size and weight.

Cell phones and PDAs use "system on a chip" integrated circuits that use less power than most notebook processors.

While it is possible to use desktop processors in laptops, this practice is generally not recommended, as desktop processors heat faster than notebook processors and drain batteries faster.

Examples

[edit]

Current

[edit]
  • ARM architecture (used in Chromebooks, Windows 10, Windows 11 laptops, Linux netbooks and recent Macs)
    • Apple M series
    • Huawei: HiSilicon Kirin
    • MediaTek
    • Nvidia: Tegra
    • Qualcomm: Snapdragon
    • Rockchip
    • Samsung Electronics: Exynos
  • x86
    • AMD: Ryzen, Athlon, and A-Series APU
    • Intel: Xeon mobile, Core, Pentium, and Celeron

Former

[edit]
  • PowerPC
    • Motorola and Freescale Semiconductor made PowerPC G4 processors for the pre-Intel Apple Computer notebooks.
  • x86
    • Transmeta: Crusoe and Efficeon
    • Intel: Pentium M
    • AMD: Mobile Athlon II, Mobile Athlon 64, Mobile Sempron

References

[edit]
  1. ^ "Fanless computer boards are pushing 15W to the limit". 15 October 2015.
  2. ^ "Intel Processor Letter Meanings [2022 Guide]". 10 January 2022.
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Processor technologies
Models
  • Abstract machine
  • Stored-program computer
  • Finite-state machine
    • with datapath
    • Hierarchical
    • Deterministic finite automaton
    • Queue automaton
    • Cellular automaton
    • Quantum cellular automaton
  • Turing machine
    • Alternating Turing machine
    • Universal
    • Post–Turing
    • Quantum
    • Nondeterministic Turing machine
    • Probabilistic Turing machine
    • Hypercomputation
    • Zeno machine
  • Belt machine
  • Stack machine
  • Register machines
    • Counter
    • Pointer
    • Random-access
    • Random-access stored program
Architecture
  • Microarchitecture
  • Von Neumann
  • Harvard
    • modified
  • Dataflow
  • Transport-triggered
  • Cellular
  • Endianness
  • Memory access
    • NUMA
    • HUMA
    • Load–store
    • Register/memory
  • Cache hierarchy
  • Memory hierarchy
    • Virtual memory
    • Secondary storage
  • Heterogeneous
  • Fabric
  • Multiprocessing
  • Cognitive
  • Neuromorphic
Instruction set
architectures
Types
  • Orthogonal instruction set
  • CISC
  • RISC
  • Application-specific
  • EDGE
    • TRIPS
  • VLIW
    • EPIC
  • MISC
  • OISC
  • NISC
  • ZISC
  • VISC architecture
  • Quantum computing
  • Comparison
    • Addressing modes
Instruction
sets
  • Motorola 68000 series
  • VAX
  • PDP-11
  • x86
  • ARM
  • Stanford MIPS
  • MIPS
  • MIPS-X
  • Power
    • POWER
    • PowerPC
    • Power ISA
  • Clipper architecture
  • SPARC
  • SuperH
  • DEC Alpha
  • ETRAX CRIS
  • M32R
  • Unicore
  • Itanium
  • OpenRISC
  • RISC-V
  • MicroBlaze
  • LMC
  • System/3x0
    • S/360
    • S/370
    • S/390
    • z/Architecture
  • Tilera ISA
  • VISC architecture
  • Epiphany architecture
  • Others
Execution
Instruction pipelining
  • Pipeline stall
  • Operand forwarding
  • Classic RISC pipeline
Hazards
  • Data dependency
  • Structural
  • Control
  • False sharing
Out-of-order
  • Scoreboarding
  • Tomasulo's algorithm
    • Reservation station
    • Re-order buffer
  • Register renaming
  • Wide-issue
Speculative
  • Branch prediction
  • Memory dependence prediction
Parallelism
Level
  • Bit
    • Bit-serial
    • Word
  • Instruction
  • Pipelining
    • Scalar
    • Superscalar
  • Task
    • Thread
    • Process
  • Data
    • Vector
  • Memory
  • Distributed
Multithreading
  • Temporal
  • Simultaneous
    • Hyperthreading
    • Simultaneous and heterogenous
  • Speculative
  • Preemptive
  • Cooperative
Flynn's taxonomy
  • SISD
  • SIMD
    • Array processing (SIMT)
    • Pipelined processing
    • Associative processing
    • SWAR
  • MISD
  • MIMD
    • SPMD
Processor
performance
  • Transistor count
  • Instructions per cycle (IPC)
    • Cycles per instruction (CPI)
  • Instructions per second (IPS)
  • Floating-point operations per second (FLOPS)
  • Transactions per second (TPS)
  • Synaptic updates per second (SUPS)
  • Performance per watt (PPW)
  • Cache performance metrics
  • Computer performance by orders of magnitude
Types
  • Central processing unit (CPU)
  • Graphics processing unit (GPU)
    • GPGPU
  • Vector
  • Barrel
  • Stream
  • Tile processor
  • Coprocessor
  • PAL
  • ASIC
  • FPGA
  • FPOA
  • CPLD
  • Multi-chip module (MCM)
  • System in a package (SiP)
  • Package on a package (PoP)
By application
  • Embedded system
  • Microprocessor
  • Microcontroller
  • Mobile
  • Ultra-low-voltage
  • ASIP
  • Soft microprocessor
Systems
on chip
  • System on a chip (SoC)
  • Multiprocessor (MPSoC)
  • Cypress PSoC
  • Network on a chip (NoC)
Hardware
accelerators
  • Coprocessor
  • AI accelerator
  • Graphics processing unit (GPU)
  • Image processor
  • Vision processing unit (VPU)
  • Physics processing unit (PPU)
  • Digital signal processor (DSP)
  • Tensor Processing Unit (TPU)
  • Secure cryptoprocessor
  • Network processor
  • Baseband processor
Word size
  • 1-bit
  • 4-bit
  • 8-bit
  • 12-bit
  • 15-bit
  • 16-bit
  • 24-bit
  • 32-bit
  • 48-bit
  • 64-bit
  • 128-bit
  • 256-bit
  • 512-bit
  • bit slicing
  • others
    • variable
Core count
  • Single-core
  • Multi-core
  • Manycore
  • Heterogeneous architecture
Components
  • Core
  • Cache
    • CPU cache
    • Scratchpad memory
    • Data cache
    • Instruction cache
    • replacement policies
    • coherence
  • Bus
  • Clock rate
  • Clock signal
  • FIFO
Functional
units
  • Arithmetic logic unit (ALU)
  • Address generation unit (AGU)
  • Floating-point unit (FPU)
  • Memory management unit (MMU)
    • Load–store unit
    • Translation lookaside buffer (TLB)
  • Branch predictor
  • Branch target predictor
  • Integrated memory controller (IMC)
    • Memory management unit
  • Instruction decoder
Logic
  • Combinational
  • Sequential
  • Glue
  • Logic gate
    • Quantum
    • Array
Registers
  • Processor register
  • Status register
  • Stack register
  • Register file
  • Memory buffer
  • Memory address register
  • Program counter
Control unit
  • Hardwired control unit
  • Instruction unit
  • Data buffer
  • Write buffer
  • Microcode
  • ROM
  • Counter
Datapath
  • Multiplexer
  • Demultiplexer
  • Adder
  • Multiplier
    • CPU
  • Binary decoder
    • Address decoder
    • Sum-addressed decoder
  • Barrel shifter
Circuitry
  • Integrated circuit
    • 3D
    • Mixed-signal
    • Power management
  • Boolean
  • Digital
  • Analog
  • Quantum
  • Switch
Power
management
  • PMU
  • APM
  • ACPI
  • Dynamic frequency scaling
  • Dynamic voltage scaling
  • Clock gating
  • Performance per watt (PPW)
Related
  • History of general-purpose CPUs
  • Microprocessor chronology
  • Processor design
  • Digital electronics
  • Hardware security module
  • Semiconductor device fabrication
  • Tick–tock model
  • Pin grid array
  • Chip carrier
Stub icon

This microcomputer- or microprocessor-related article is a stub. You can help Wikipedia by adding missing information.

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