ispMACH 4000Z CPLDs in PDAs, Personal Media Players and Smart Phones
Category: Telephone, cellular phone and intercom
Manufacture: Lattice Semiconductor Corp.
Datasheet: Download this application note
White Paper ispMACH 4000Z CPLDs in PDAs, Personal Media Players and Smart Phones
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spMACH 4000Z CPLDs in PDAs, Personal Media Players and Smart Phones
This paper provides an overview of portable, handheld computing, internet audio/video and communication devices, PDAs, Personal Media Players, and Smart Phones, and how Lattice low-cost programmable devices can be used to solve design challenges typical of these electronic products. The paper begins with an overview of the market for PDAs, Personal Media Players and Smart Phones, and how the market for these devices is set to converge in the near future. Next, the major building blocks of a PDA / Personal Media Player / Smart Phone are detailed, including an overview of the underlying technologies and standards that might be used in the system. Finally, the paper illustrates how the "zero-power" ispMACHTM 4000Z CPLDs can be used to implement ASSP bug fixes, power management, glue logic and security in a next generation, integrated Smart Phone / PDA / Personal Media Player design. Detailed information about the ispMACH 4000Z device family can be found on the Lattice website at www.latticesemi.com.
What is a PDA / Smart Phone / Personal Media Player?
A PDA (Personal Digital Assistant) is essentially the electronic replacement of the paper filofax combined with a mini-por table, handheld Personal Computer. PDAs typically perform functions such as calendar, alarm, address book, note-taking, data collection, to-do list, and games, along with limited word processing, spreadsheet and finance applications. Many PDAs provide e-mail and internet access, use touch-screen LCDs for data entry and are able to be synchronized (synched) to a PC. Popular PDA examples include Palm OS-devices, such as the PalmOne Tungsten T3, Microsoft PocketPC OS-devices, such as the HP iPAQ 4155 or Sony Clie PEG-TH55, and proprietary-OS devices, such as the RIM BlackBerry 7230. High-end PDAs typically have 64-128MB of installed memory along with an SDIO/MMC expansion slot for additional memory or peripherals, such as wireless modules, camera modules or MP3 player modules. A Personal Media Player (PMP) is a set of portable devices including MP3 players, music jukeboxes, and video jukeboxes that store and play compressed media such as MP3, WMV, JPEG and MPEG-4 files. Popular examples include the Apple iPod, Diamond Rio, iRiver iHP-140, and the Archos AV300. Personal Media Players can be divided by storage media type -- hard-disk (HDD) versus solid state (typically flash) memory. The high price of solid-state flash memory relative to hard-disk storage is driving the PMP market towards miniature hard-disk based systems, such as the Apple iPod. According to Portal Player, a leading chip set manufacturer for PMPs, hard-disk based compressed media players are projected to grow to 45% share by 2005 . Microsoft has announced a line of HDD-based media devices called Portable Media Centers that are expected to begin widespread release in the second half of 2004, partnering with Creative Technology, Samsung and iRiver. An early example of a Microsoft par tner PMP device is the Creative Zen Portable Media Center, which has a storage capacity of 20GB or higher . A Smart Phone is a mobile phone handset or terminal that includes some additional features of PDAs, such as address book, calendar, internet access and messaging. Popular examples are the Nokia 6600, Motorola MPx200, Sony Ericsson P900 and PalmOne Treo 600. The main distinction between Smart Phones and PDAs are that Smar t Phones are more communications centric, whereas PDAs are more data-centric. Also, Smart Phones can typically be used with one hand, whereas PDAs usually require two hands. In addition to the PDA-operating systems named above from Palm and Microsoft, a consortium of wireless companies (Nokia, Samsung, Sony Ericsson and others) has created an additional OS for Smart Phones called Symbian.