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IPod Touch
The iPod Touch (stylized as iPod touch) is a discontinued line of iOS-based mobile devices designed and marketed by Apple Inc. with a touchscreen-controlled user interface. As with other iPod models, the iPod Touch can be used as a music player and a handheld gaming device, but can also be used as a digital camera, a web browser and for messaging. It is similar in design to the iPhone, but it connects to the Internet only through Wi-Fi and does not use cellular network data, so it is not a smartphone. The iPod Touch was introduced in 2007; some 100 million iPod Touch units were sold by May 2013. The final generation of iPod Touch, released on May 28, 2019, is the seventh-generation model. iPod Touch models were sold by storage space and color; all models of the same generation typically offered identical features, performance, and operating system upgrades. An exception was the fifth generation, in which the low-end (16 GB) model was initially sold without a rea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IPod
The iPod is a discontinued series of portable media players and multi-purpose mobile devices designed and marketed by Apple Inc. The first version was released on October 23, 2001, about months after the Macintosh version of iTunes was released. Apple sold an estimated 450 million iPod products as of 2022. Apple discontinued the iPod product line on May 10, 2022. At over 20 years, the iPod brand is the oldest to be discontinued by Apple. Like other digital music players, some versions of the iPod can serve as external data storage devices. Prior to macOS 10.15, Apple's iTunes software (and other alternative software) could be used to transfer music, photos, videos, games, contact information, e-mail settings, Web bookmarks, and calendars to the devices supporting these features from computers using certain versions of Apple macOS and Microsoft Windows operating systems. Before the release of iOS 5, the iPod branding was used for the media player included with the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ampere Hour
An ampere hour or amp hour (symbol: A⋅h or A h; often simplified as Ah) is a unit of electric charge, having dimensions of electric current multiplied by time, equal to the charge transferred by a steady current of one ampere flowing for one hour, or 3,600 coulombs. The commonly seen milliampere hour (symbol: mA⋅h, mA h, simplified as mAh) is one-thousandth of an ampere hour (3.6 coulombs). Use The ampere hour is frequently used in measurements of electrochemical systems such as electroplating and for battery capacity where the commonly known nominal voltage is dropped. A ''milliampere second'' (mA⋅s) is a unit of measurement used in X-ray imaging, diagnostic imaging, and radiation therapy. It is equivalent to a ''millicoulomb''. This quantity is proportional to the total X-ray energy produced by a given X-ray tube operated at a particular voltage. The same total dose can be delivered in different time periods depending on the X-ray tube current. To help e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LPDDR
Low-Power Double Data Rate (LPDDR), also known as LPDDR SDRAM, is a type of synchronous dynamic random-access memory that consumes less power and is targeted for mobile computers and devices such as mobile phones. Older variants are also known as Mobile DDR, and abbreviated as mDDR. Modern LPDDR SDRAM is distinct from DDR SDRAM, with various differences that make the technology more appropriate for the mobile application. LPDDR technology standards are developed independently of DDR standards, with LPDDR4X and even LPDDR5 for example being implemented prior to DDR5 SDRAM and offering far higher data rates than DDR4 SDRAM. Bus width In contrast with standard SDRAM, used in stationary devices and laptops and usually connected over a 64-bit wide memory bus, LPDDR also permits 16- or 32-bit wide channels. The "E" versions mark enhanced versions of the specifications. They formalize overclocking the memory array up to 266 MHz for a 33% performance boost. Memory modules impleme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megabyte
The megabyte is a multiple of the unit byte for digital information. Its recommended unit symbol is MB. The unit prefix ''mega'' is a multiplier of (106) in the International System of Units (SI). Therefore, one megabyte is one million bytes of information. This definition has been incorporated into the International System of Quantities. In the computer and information technology fields, other definitions have been used that arose for historical reasons of convenience. A common usage has been to designate one megabyte as (220 B), a quantity that conveniently expresses the binary architecture of digital computer memory. The standards bodies have deprecated this usage of the megabyte in favor of a new set of binary prefixes, in which this quantity is designated by the unit mebibyte (MiB). Definitions The unit megabyte is commonly used for 10002 (one million) bytes or 10242 bytes. The interpretation of using base 1024 originated as technical jargon for the byte SI prefix, mult ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flash Memory
Flash memory is an electronic non-volatile computer memory storage medium that can be electrically erased and reprogrammed. The two main types of flash memory, NOR flash and NAND flash, are named for the NOR and NAND logic gates. Both use the same cell design, consisting of floating gate MOSFETs. They differ at the circuit level depending on whether the state of the bit line or word lines is pulled high or low: in NAND flash, the relationship between the bit line and the word lines resembles a NAND gate; in NOR flash, it resembles a NOR gate. Flash memory, a type of floating-gate memory, was invented at Toshiba in 1980 and is based on EEPROM technology. Toshiba began marketing flash memory in 1987. EPROMs had to be erased completely before they could be rewritten. NAND flash memory, however, may be erased, written, and read in blocks (or pages), which generally are much smaller than the entire device. NOR flash memory allows a single machine word to be written to an era ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PowerVR
PowerVR is a division of Imagination Technologies (formerly VideoLogic) that develops hardware and software for 2D and 3D rendering, and for video encoding, decoding, associated image processing and DirectX, OpenGL ES, OpenVG, and OpenCL acceleration. PowerVR also develops AI accelerators called Neural Network Accelerator (NNA). The PowerVR product line was originally introduced to compete in the desktop PC market for 3D hardware accelerators with a product with a better price–performance ratio than existing products like those from 3dfx Interactive. Rapid changes in that market, notably with the introduction of OpenGL and Direct3D, led to rapid consolidation. PowerVR introduced new versions with low-power electronics that were aimed at the laptop computer market. Over time, this developed into a series of designs that could be incorporated into system-on-a-chip architectures suitable for handheld device use. PowerVR accelerators are not manufactured by PowerVR, but instead t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ARMv8
ARM (stylised in lowercase as arm, formerly an acronym for Advanced RISC Machines and originally Acorn RISC Machine) is a family of reduced instruction set computer (RISC) instruction set architectures for computer processors, configured for various environments. Arm Ltd. develops the architectures and licenses them to other companies, who design their own products that implement one or more of those architectures, including system on a chip (SoC) and system on module (SOM) designs, that incorporate different components such as memory, interfaces, and radios. It also designs cores that implement these instruction set architectures and licenses these designs to many companies that incorporate those core designs into their own products. There have been several generations of the ARM design. The original ARM1 used a 32-bit internal structure but had a 26-bit address space that limited it to 64 MB of main memory. This limitation was removed in the ARMv3 series, which ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ARM Cortex-A9
The ARM Cortex-A9 MPCore is a 32-bit multi-core processor that provides up to 4 cache-coherent cores, each implementing the ARM v7 architecture instruction set. It was introduced in 2007. Features Key features of the Cortex-A9 core are: * Out-of-order speculative issue superscalar execution 8-stage pipeline giving 2.50 DMIPS/MHz/core. * NEON SIMD instruction set extension performing up to 16 operations per instruction (optional). * High performance VFPv3 floating point unit doubling the performance of previous ARM FPUs (optional). * Thumb-2 instruction set encoding reduces the size of programs with little impact on performance. * TrustZone security extensions. * Jazelle DBX support for Java execution. * Jazelle RCT for JIT compilation. * Program Trace Macrocell and CoreSight Design Kit for non-intrusive tracing of instruction execution. * L2 cache controller (0–4 MB). * Multi-core processing. ARM states that the TSMC 40G hard macro implementation typically oper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multi-core Processor
A multi-core processor is a microprocessor on a single integrated circuit with two or more separate processing units, called cores, each of which reads and executes program instructions. The instructions are ordinary CPU instructions (such as add, move data, and branch) but the single processor can run instructions on separate cores at the same time, increasing overall speed for programs that support multithreading or other parallel computing techniques. Manufacturers typically integrate the cores onto a single integrated circuit die (known as a chip multiprocessor or CMP) or onto multiple dies in a single chip package. The microprocessors currently used in almost all personal computers are multi-core. A multi-core processor implements multiprocessing in a single physical package. Designers may couple cores in a multi-core device tightly or loosely. For example, cores may or may not share caches, and they may implement message passing or shared-memory inter-core communica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ARM Cortex-A8
The ARM Cortex-A8 is a 32-bit processor core licensed by ARM Holdings implementing the ARMv7-A architecture. Compared to the ARM11, the Cortex-A8 is a dual-issue superscalar design, achieving roughly twice the instructions per cycle. The Cortex-A8 was the first Cortex design to be adopted on a large scale in consumer devices. Features Key features of the Cortex-A8 core are: * Frequency from 600 MHz to 1 GHz and above * Superscalar dual-issue microarchitecture * NEON SIMD instruction set extension * 13-stage integer pipeline and 10-stage NEON pipeline * VFPv3 Floating Point Unit * Thumb-2 instruction set encoding * Jazelle RCT (Also known as ThumbEE instruction set) * Advanced branch prediction unit with >95% accuracy * Integrated level 2 Cache (0–4 MiB) * 2.0 DMIPS/MHz Chips Several system-on-chips (SoC) have implemented the Cortex-A8 core, including: * Allwinner A1X * Apple A4 * Freescale Semiconductor i.MX51 * Rockchip RK2918, RK2906 * Samsung Exyn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apple A10
The Apple A10 Fusion is a 64-bit ARM-based system on a chip (SoC), designed by Apple Inc. and manufactured by TSMC. It first appeared in the iPhone 7 and 7 Plus which were introduced on September 7, 2016, and is used in the sixth generation iPad, seventh generation iPad, and seventh generation iPod Touch. The A10 is the first Apple-designed quad-core SoC, with two high-performance cores and two energy-efficient cores. Apple states that it has 40% greater CPU performance and 50% greater graphics performance compared to its predecessor, the Apple A9. The Apple T2 chip is based on the A10. On May 10, 2022, the iPod Touch 7th generation was discontinued, ending production of A10 Fusion chips. The latest software updates for the iPhone 7 & 7 Plus including the iPod Touch 7th generation variants systems using this chip are iOS 15.7.2, released on December 13, 2022 as they were discontinued with the release of iOS 16 in 2022, while updates for the iPad ( 6th & 7th generation) va ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apple A8
The Apple A8 is a 64-bit ARM-based system on a chip (SoC) designed by Apple Inc. It first appeared in the iPhone 6 and iPhone 6 Plus, which were introduced on September 9, 2014. Apple states that it has 25% more CPU performance and 50% more graphics performance while drawing only 50% of the power of its predecessor, the Apple A7. The latest software updates for the 1.1GHz and 1.4GHz variants systems using this chip are iOS 12.5.6, released on August 31, 2022 as they were discontinued with the release of iOS 13 in 2019, and 1.5GHz variant for the iPad Mini 4 is iPadOS 15.7.1, released on October 27, 2022 as it was discontinued with the release of iPadOS 16 in 2022, while updates for the 1.5GHz variant continue for Apple TV HD. The A8 chip was discontinued on October 18, 2022, following the discontinuation of the Apple TV HD. Design The A8 is manufactured on a 20 nm process by TSMC, which replaced Samsung as the manufacturer of Apple's mobile device processors. It con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
