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iPod Touch

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iPod touch

4th generation iPod Touch
DeveloperApple Inc.
TypePortable media player/PDA/Handheld game console/Mobile Internet device/Digital audio player/E-book reader/Camcorder/Webcam/Digital Camera
Lifespan

1st generation: September 13, 2007
2nd generation: September 9, 2008
3rd generation: September 9, 2009

4th generation: September 8, 2010
Operating systemiOS

1st generation: 3.1.3 (1.1 originally)
2nd generation: 4.2.1 (2.1.1 originally)
3rd generation: 4.3 beta 3 (3.1.1 originally)

4th generation: 4.3 beta 3 (4.1 originally)
CPU1st generation:

ARM11 620 MHz (underclocked to 400 MHz, then 412 MHz)
2nd generation:
ARM11 620 MHz (underclocked to 533 MHz),[1] without internal ARM7 core for Jazelle acceleration
3rd generation:
ARM Cortex-A8 833 MHz (underclocked to 600 MHz)
4th generation:

ARM Cortex-A8 Apple A41 GHz (underclocked to 800 MHz)
Memory

1st/2nd generation: 128 MB DRAM

3rd/4th generation: 256 MB DRAM
Display

1st-3rd generations: 3.5 in (89 mm), 3:2 aspect ratio, 18-bit color depth LCD, 480×320 px at 163 ppi

4th generation: 3.5 in (89 mm), 3:2 aspect ratio, 24-bit color depth, aluminosilicate glass-covered LED-backlit LCD, 960×640 px at 326 ppi
Graphics

1st/2nd generation: PowerVR MBX Lite[2]

3rd/4th generation: PowerVR SGX
Input
Camera 4th generation: 0.7MP fixed-focus camera with HD video capture (720p at 30fps) with 960 x 720 resolution still images [3][4]
Connectivity
Power3.7 V rechargeable Lithium-ion battery

1st generation:
Audio - 22 hours, Video - 5 hours
2nd generation:
2.92 Wh, 789 mAh; Audio - 36 hours, Video - 6 hours
3rd generation:
2.92 Wh, 789 mAh;[6] Audio - 30 hours, Video - 6 hours
4th generation:

3.44 Wh, 930 mAh; Audio - 40 hours, Video - 7 hours[7][8]
Dimensions1st generation:

4.3 in (110 mm) × 2.4 in (61 mm) × 0.31 in (7.9 mm) (H×W×D)
2nd/3rd generation:
4.3 in (110 mm) × 2.4 in (61 mm) × 0.33 in (8.4 mm) (H×W×D)
4th generation:

4.4 in (110 mm) × 2.3 in (58 mm) × 0.28 in (7.1 mm) (H×W×D)
Mass

1st generation: 120 g (4.2 oz)
2nd/3rd generation: 115 g (4.1 oz)

4th generation: 101 g (3.6 oz)
RelatediPhone, iPad (List of iOS devices)

The iPod Touch (stylized, trademarked, and marketed as lowercase iPod touch) is a portable media player, personal digital assistant, and Wi-Fi mobile platform designed and marketed by Apple Inc. The iPod Touch adds the multi-touch graphical user interface to the iPod line. It is the first iPod with wireless access to the iTunes Store, and also has access to Apple's App Store, enabling content to be purchased and downloaded directly on the device. Apple Inc. has sold over 45 million iPod Touch units as of September 2009.[9]

Hardware

The iPod Touch has a slim rectangular shape with rounded edges, with a glass multi-touch display covering most of the top surface and a physical home button off the touchscreen. The display functions similarly to the multi-touch trackpad as implemented in Apple's current line of laptop computers. It is also very similar to the iPad interface and the Apple Magic Trackpad. The touch and gesture features of the iPod Touch are based on technology originally developed by FingerWorks.[10]

Software

The operating system that runs all iPhones and iPod Touches is called iOS (iPhone Operating System.) Since iOS 1.0 the operating system has received a major update each year at roughly around the same time. The first major update to the iOS was iOS 2.0. This version of the iOS introduced the App Store which allowed 3rd party applications to be run on iPhones and iPod touches. iOS 2.0 debuted June 29, 2008. iPhone users received the update for free while iPod touch users had to pay. The second major update to the operating system, iOS 3.0 was released June 17, 2009. iOS 3.0 added features such as cut, copy and paste, data tethering and push notification support. As with the previous major release iPhone users got the update for free while iPod Touch users had to pay. iOS 4 was made available to the public on June 21, 2010. This is the first major iOS release to drop support for some devices. The iPhone 3G and iPod Touch 2nd generation have limited features, while the iPhone 4, iPhone 3GS, iPod Touch 3rd generation & iPod Touch 4th generation have all features enabled. The iPod Touch first generation and original iPhone are not supported in this release. The major features included in this release are iBooks, Facetime and multitasking.

Apple has received criticism for charging iPod Touch owners for major updates of iOS that iPhone owners can obtain at no charge, as well as excluding certain features from the iPod Touch software that are included in the iPhone.[11][12] Apple has said that they can add features for free to the iPhone because the revenue from it is accounted for on a subscription basis under accounting rules, rather than as a one time payment.[13] At WWDC in June 2010, Jobs announced that Apple had "found a way" to make subsequent OS upgrades available free to iPod Touch owners. However, iOS 4.0 and onwards isn't available for the first generation iPod touch and some features are only available for the 32GB and 64GB third generation iPod touches released in September 2009 and the fourth generation iPod touches in 2010.

Comparison to the iPhone

Further information: [[:iOS (Apple)]] and [[:iOS version history]]

The iPod Touch and the iPhone, a smartphone by Apple Inc., share the same hardware platform and run the same iOS operating system. The iPod Touch lacks some of the iPhone's featues and associated apps, such as access to cellular networks (and speaker on older models). Also, the hold button is on the opposite side (until the iPod touch 4th generation). As a result, the iPod Touch is slimmer and lighter than the iPhone. Steve Jobs once referred to the iPod Touch as "training wheels for the iPhone".[14]

Requirements

Synchronization

As supplied new, the iPod Touch must be connected to a Macintosh or Windows computer. There is no official Linux support. On either operating system, the iPod Touch must be connected through a USB port. This will charge the iPod Touch and Sync any songs that are wanted on the iPod Touch. Special cables that plug in to a wall can also be bought separately but can only be used to charge the iPod Touch. [15]

The first time the iPod Touch is turned on, a graphic of the iTunes logo and USB cable is displayed continuously until the iPod Touch is connected to a computer running iTunes.[16]

Battery charging

Starting with the second generation, iPod Touch can only be charged from the 5V pin of the dock connector while most previous iPod models (including the original iPod Touch) could also be charged from the 12V pin for FireWire power.[17] This change dropped support for charging in vehicles equipped with a FireWire-based iPod connection. Most aftermarket manufacturers of such equipment offer cables and/or adapters which convert the vehicle's 12 V to 5 V.

iTunes

To use the iPod Touch for purchasing content on the iTunes Store via Wi-Fi, a new or existing iTunes Store account must be associated Apple states that the following are required for the iPod Touch:[18]

  • iTunes 10 for iOS 4.1 or later, iTunes 9.2.0.61 for iOS 4.0.x or later, iTunes 8.2 for iPhone OS 3.0.x or later, iTunes 8.0 for iPhone OS 2.1.x, iTunes 7.6 for iPhone OS 2.0.x or earlier
  • An available USB 2.0 port

Third-party applications

Earphones with an external microphone and controller are compatible with the 2nd generation iPod Touch, and are shipped with the 3rd generation iPod Touch devices (excluding the 8GB model).

The only official way to obtain third-party applications for the iPod Touch is Apple's App Store, which is a branch of iTunes Store. The App Store application, available in all versions of iOS from 2.0 onwards, allows users to browse and download applications from a single online repository (hosted by Apple) with the iTunes Store. To develop such software, a software development kit (SDK) was officially announced on March 6, 2008, at an Apple Town Hall meeting.[19] The iPhone SDK allows developers to make applications for the iPhone and iPod Touch after paying a fee to join the development team. The developer can then set the price for the applications they develop and will receive 70% of money earned. The developer can also opt to release the application for free and will not pay any additional costs.

Shortly after the iPhone (then also the iPod touch) was released, hackers were able to "jailbreak" the device through a TIFF exploit. The application installed by this exploit enabled the user to download a selection of unofficial third-party programs. Jailbreaking the iPod Touch was the only way to get third-party programs when running 1.1.x OSes. These third-party programs could use additional functionality not supported by Apple (such as enabling multitasking, applying themes to the home screen or enable battery percentage indicator. All officially released versions of iOS through 3.1.2, and 4.0, as well as 4.2.1 with some bugs, can be jailbroken,[20][21] but version 3.1 could not at the time it was released.[22] Servicing an iPod Touch after jailbreaking or other modifications made by unofficial means is not covered by Apple's warranty (however, the jailbreaking process is easily undone by performing a restore through iTunes).[23]

Models

Main articles: List of iOS devices and List of iPod models
Model Picture Capacity RAM Connection Original release date Minimum OS to sync Rated battery life (hours)
1st generation 8 GB
16 GB[24] 		128 MB[citation needed] USB via Dock connector (FireWire for charging only)[17] September 5, 2007 Mac: 10.4 or later
Win: XP, Vista, 7 		audio: 22
video: 5
32 GB[24] February 5, 2008
The first generation iPod was launched on September 5, 2007, at an event called The Beat Goes On.[25] First iPod with Wi-Fi and a Multi-Touch interface. Features Safari web browser and wireless access to the iTunes Store and YouTube. 32 GB version later added. iPhone OS 2.0 and App Store access requires an upgrade fee. iOS software updates no longer supported.
2nd generation 8 GB
16 GB
32 GB[24] 		128 MB[citation needed] USB via Dock connector September 9, 2008
September 9, 2009 (for 8 GB released with iPhone OS 3.1) 		Mac: 10.4 or later
Win: XP, Vista, 7 		audio: 36
video: 6
New tapered chrome back with Nike+ functionality, volume buttons, and built-in speaker added. iPhone OS 2.0 and App Store access standard. Bluetooth support added but not made active until iPhone OS 3.0, which requires an upgrade fee. Support for external microphone and remote added. The 8 GB model was re-introduced alongside the 3rd generation iPod touch in September 2009, and included the newer iPhone OS 3.1. iOS 4 was released for free for second generation iPod touch models June 21, 2010, but included a limited selection of features. Future iOS software updates no longer supported (As of iOS 4.2.1).The second generation iPod Touch features external volume controls, a built-in speaker, a contoured back, built-in Nike+, Bluetooth support, and the ability to connect a microphone. It was unveiled on September 9, 2008, at the "Let's Rock" keynote presentation. The 2nd generation iPod Touch has an external volume switch and a built-in speaker like the iPhone. The 2nd generation also comes with the chrome frame seen on the iPhone 3G, making the two almost identical when viewed from the front. However, there are some notable differences, as there is no speaker above the screen, no silent/ringer switch, the back is metal, and the sleep/wake button is on the other side. The 2nd generation also supports audio input when a headphone or earphone with microphone capabilities is plugged into the audio output (headphone) jack. The iPod Touch 2.0 Software Update supports WPA2 Enterprise with 802.1X authentication.[26] The iPhone OS 3.0 update unlocked Bluetooth capability on the 2nd generation iPod Touch, as the included Wi-Fi chip (Broadcom BCM4325) has Bluetooth support.[27][28] The 2nd generation iPod Touch is said to have a yellower cast/tint to the display, as compared to the iPhone or the original iPod Touch.[29] The applications processor inside the 2nd generation iPod Touch runs slightly faster than the processor inside the iPhone 3G, but slower than the iPhone 3GS.[30][31] The first generation iPod Touch works with all "Made for iPod" peripherals, but certain changes that Apple made to the 2nd generation iPod Touch prevent some existing peripherals from recharging the updated player.[32] The Google Street View feature added on iPhone firmware version 2.2 is absent from the same version of firmware released on the iPod Touch,[33] but is found in the 3.0 update.
3rd generation 32 GB
64 GB[24] 		256 MB USB via Dock connector September 9, 2009 Mac: 10.4 or later
Win: XP, Vista, 7 		audio: 30
video: 6
Updated to include the upgraded RAM, CPU and GPU internals from the iPhone 3GS; the 32 GB and 64 GB models include Voice Control support, VoiceOver, included OS version 3.x, and bundled remote earphones with microphone. iOS 4 was released for free for third generation iPod touch models June 21, 2010 and included Multitasking and homescreen wallpapers. The 3rd generation iPod Touch with iPhone OS 3.1 was announced and subsequently released on September 9, 2009.[34] It is available with 32 GB or 64 GB of flash memory. Apple also continued offering the 2nd generation 8 GB version running the 3rd generation OS.[35] The new 3rd generation iPod Touch[36] includes faster hardware (the same microprocessors, graphics engine, and RAM as the iPhone 3GS), a slightly lower battery life, voice control, light sensor, and bundled earphones with a remote and microphone. The 2nd and 3rd generation iPod Touch can now be updated to iOS 4.x for free, but cannot take advantage of features using the iPhone's camera or GPS receiver.
4th generation 8 GB
32 GB
64 GB[24] 		256 MB[37] USB via Dock connector September 8, 2010 Mac: 10.5.8 or later
Win: XP, Vista, 7 		audio: 40
video: 7
Apple unveiled the 4th generation iPod Touch on September 1, 2010. It features Apple's Retina display and two cameras; one front-facing camera for FaceTime, Skype, and other video chat applications, photos and high-definition video recording and one rear-facing camera for photos and HD video recording. It also contains Apple's A4 for faster processing, a microphone for communication, voice recognition, and voice memos, which can be useful for recording things, such as an academic tutorial, a voice lesson, or a college lecture, and a three-axis gyroscopic sensor which enables the device to recognize approximately how far, fast, and in which direction it has moved in space. The device originally shipped with iOS 4.1, which added Game Center to iOS along with the ability to use FaceTime through Wi-Fi. Has a front-facing camera for FaceTime, the iPhone's Retina display without an IPS screen,[38] has support for recording 720p video and 960 x 640 still photos via a back camera,[4] Apple's A4 chip, a built-in microphone, and a 3-axis gyroscope. The hold button has been moved to the right of the iPod.

Specifications

Model 1st generation 2nd generation 3rd generation 4th generation
Initial operating system iPhone OS 1.1 iPhone OS 2.1.1 iPhone OS 3.1.1 iOS 4.1
Highest Supported operating system iPhone OS 3.1.3 iOS 4.2.1 iOS 4.3
Display 3.5 in (89 mm); 2:3 aspect ratio, 262,144-color,

glossy glass-covered LCD screen, 480×320 px (HVGA) at 163 ppi

3.5 in (89 mm); 2:3 aspect ratio; 24-bit color, glossy glass-covered LED-backlit LCD, 960×640 px at 326 ppi
Processor 620 MHz (underclocked to 412 MHz, originally 400 MHz)
ARM 1176JZ(F)-S core
Samsung S5L8900[1] 		620 MHz (underclocked to 533 MHz)
ARM 1176JZ(F)-S core
Samsung S5L8900[1] 		833 MHz (underclocked to 600 MHz)
ARM Cortex-A8 core[39]
Samsung S5PC100 		1 GHz
ARM Cortex-A8 core
Apple A4[40]
Graphics processor PowerVR MBX Lite GPU[41] PowerVR SGX535 GPU[42]
Storage 8, 16 and 32 GB 8, 32 and 64 GB
Memory 128 MB DRAM[43] 256 MB DRAM[40][44][45]
Connectivity Wi-Fi (802.11b/g),
USB 2.0/Dock connector 		In addition to previous:
Bluetooth 2.1 + EDR (requires iPhone OS 3.0),
Built-in speaker, Hardware volume controls, Nike+ 		In addition to previous:
Voice Control,
Includes earphones with remote and mic 		In addition to previous:
802.11n (2.4 GHz only)
3-axis gyroscope
Microphone
Cameras — Back (main): CMOS image sensor with video (720p HD at 30 fps);
Front: VGA-quality photos and video at up to 30 fps.
Audio processor Wolfson Microelectronics WM8758BG[46] Cirrus Logic CS4398[citation needed] Cirrus Logic CS4398[47] Cirrus Logic
Materials Stainless steel back and aluminum bezel; plastic for Wi-Fi antenna Contoured stainless steel back and bezel; plastic for Wi-Fi and Bluetooth antenna No plastic for antenna
Power Built-in rechargeable lithium-ion polymer battery[48][49][50]
3.7 V 2.15 W·h (580 mA·h)[citation needed] 3.7 V 2.73 W·h (739 mA·h)[49][51] 3.7 V 2.92 W·h (789 mA·h)[50] 3.7 V 3.44 W·h (930 mA·h)
Rated battery life (hours) audio: 22
video: 5 		audio: 36
video: 6 		audio: 30
video: 6 		audio: 40
video: 7
Dimensions 110 × 61.8 × 8 mm (4.3 × 2.4 × 0.31 in) 110 × 61.8 × 8.5 mm (4.3 × 2.4 × 0.33 in) 111 × 58.9 × 7.2 mm (4.4 × 2.3 × 0.28 in)
Weight 120 g (4.2 oz) 115 g (4.05 oz) 101 g (3.6 oz)
Released 8 and 16 GB: September 14, 2007
32 GB: February 5, 2008 		September 9, 2008 September 9, 2009 September 8, 2010
Discontinued September 9, 2008 16 and 32 GB: September 9, 2009
8 GB: September 1, 2010 		September 12, 2010 In Production

See also

Template:Wikipedia-Books

References

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  2. ^ "Intel ups stake in iPhone GPU maker". Electronista.com. December 23, 2008. Retrieved March 3, 2010.
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External links

Wikimedia Commons has media related to iPod touch.
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