XO small laptop, One laptop per child

XO is about the size of a textbook and lighter than a lunch box. Thanks to a flexible design and “transformer” hinge, the laptop easily assumes any of several configurations: standard laptop use, e-book reading, and gaming. It is highly durable and is fitted with a special screen which allows it to be used outdoors, in the blaze of the sun.

The laptop has rounded edges. The integrated handle is kid-sized, as is the sealed, rubber-membrane keyboard. The novel, dual-mode, extra-wide touchpad supports pointing, as well as drawing and writing.

XO is fully compliant with the European Union’s RoHS Directive. It contains no hazardous materials. Its LiFePO4 or NiMH batteries contain no toxic heavy metals, plus it features enhanced battery management for an extended recharge-cycle lifetime. It will also tolerate alternate power-charging sources, such as car batteries.

Experience shows that laptop components most likely to fail are the hard drive and internal connectors. Therefore, XO has no hard drive to crash and only two internal cables. For added robustness, the machine’s plastic walls are 2mm thick, as opposed to the standard 1.3mm. Its wireless antennas, which far outperform the typical laptop, double as external covers for the USB ports, which are protected internally as well. The display is also cushioned by internal “bumpers.”

The estimated product lifetime is at least five years. To help ensure such durability, the machines are being subjected to factory testing to destruction, as well as field testing by children.

For more information visit small laptop XO

XO One laptop per child Specs

Physical dimensions

• Approximate dimensions: 242mm×228mm×32mm;
• Approximate weight: 1.45KG with LiFeP battery; 1.58KG with NiMH battery;
• Configuration: Convertible laptop with pivoting, reversible display; dirt- and moisture-resistant system enclosure; no fan.

Core electronics

• CPU: x86-compatible processor with 64KB each L1 I and D cache; at least 128KB L2 cache; AMD Geode LX-700@0.8W (datasheet);
• CPU clock speed: 433 Mhz;
• ISA compatibility: Support for both the MMX and 3DNow! x86 instruction-set extensions; Athlon instruction set (including MMX and 3DNow! Enhanced) with additional Geode-specific instructions;
• Companion chips: PCI and memory interface integrated with CPU; North Bridge: PCI and Memory Interface integrated with Geode CPU; AMD CS5536 South Bridge (datasheet);
• Graphics controller: Integrated with Geode CPU; unified memory architecture;
• Embedded controller: ENE KB3700 or ENE KB3700B;
• DRAM memory: 256 MiB dynamic RAM;
• Data rate: Dual — DDR333 — 166 Mhz;
• 1024KB SPI-interface flash ROM;
• Mass storage: 1024 MiB SLC NAND flash, high-speed flash controller;
• Drives: No rotating media;
• CAFE ASIC (Camera, Flash Enabler chip, provides high-performance Camera, NAND FLASH and SD interfaces); Marvell 88ALP01: (CAFE specification).

Display

• Liquid-crystal display: 7.5” Dual-mode TFT display;
• Viewing area: 152.4mm × 114.3mm;
• Resolution: 1200 (H) × 900 (V) resolution (200 DPI);
• Monochrome display: High-resolution, reflective sunlight-readable monochrome mode; Color display: Standard-resolution, Quincunx-sampled, transmissive color mode;
• LCD power consumption: 0.1 Watt with backlight off; 0.2–1.0 Watt with backlight on;
• The display-controller chip (DCON) with memory that enables the display to remain live with the processor suspended; the display and this chip are the basis of our extremely low power architecture; the display controller chip also enables de-swizzling and anti-aliasing in color mode.

Integrated peripherals

• Keyboard: 80+ keys, 1.0mm stroke; sealed rubber-membrane key-switch assembly;
• Keyboard layout details;
• Keyboard layout pictures: international, Thai, Arabic, Spanish, Portuguese, West African, Urdu, Mongolian, Cyrillic, Amharic;
• Gamepad: Two sets of four-direction cursor-control keys;
• Touchpad: Dual capacitance/resistive touchpad; supports written-input mode; ALPS Electric Dual capacitive/resistive touchpad;
• Audio: AC97-compatible audio audio subsystem; internal stereo speakers and amplifier; internal monophonic microphone; jacks for external headphones and microphone; Analog Devices AD1888 and Analog Devices SSM2211 for audio amplification;
• Wireless networking: Integrated 802.11b/g (2.4GHz) interface; 802.11s (Mesh) networking supported; dual adjustable, rotating coaxial antennas; supports diversity reception; capable of mesh operation when CPU is powered down; Marvell Libertas 88W8388 controller and 88W8015 radio;
• Status indicators: Power, battery, WiFi (2); visible when lid is open or closed; microphone in-use and camera in-use visible when lid is open;
• Video camera: integrated color vision camera; 640×480 resolution at 30FPS; Omnivision OV7670.

External connectors

• DC power: 6mm (1.65mm center pin) connector; 11 to 18 V input usable, –32 to 40 V input tolerated; power draw limited to 15 W;
• Headphone output: Standard 3.5mm 3-pin switched stereo audio jack;
• Microphone input: Standard 3.5mm 2-pin switched mono microphone jack; selectable 2V DC bias; selectable sensor-input mode (DC or AC coupled);
• USB: Three Type-A USB-2.0 connectors; up to 1A power supplied (total);
• Flash expansion: MMC/SD Card slot.

Battery

• Pack type: 2 or 4 cells LiFePO4; or 5 cells NiMH, approximately 6V series configuration;
• Capacity: 22.8 Watt-hours (LiFePO4); 16.5 Watt-hours (NiMH);
• Fully-enclosed “hard” case; user removable;
• Electronics integrated with pack provide:
• Identification;
• Battery charge and capacity information;
• Thermal and over-current sensors along with cutoff switch to protect battery;
• Minimum 2,000 charge/discharge cycles (to 50% capacity of new);
• Power management will be critical.

BIOS/loader

• Open Firmware used to load the operating system.

Environmental specifications

• Temperature: UL certification planned to 45C [as of Q32007], pending 50C certification in mid-2008;
• Humidity: UL certification planned to IP42 (perhaps higher) when closed, the unit should seal well enough that children walking to and from school need not fear rainstorms and dust;
• Maximum altitude: –15m to 3048m (14.7 to 10.1 PSIA) (operating), –15m to 12192m (14.7 to 4.4 PSIA) (non-operating);
• Shock 125g, 2ms, half-sine (operating) 200g, 2ms, half-sine (non-operating);
• Random vibration: 0.75g zero-to-peak, 10Hz to 500Hz, 0.25 oct/min sweep rate (operating); 1.5g zero-to-peak, 10Hz to 500Hz, 0.5 oct/min sweep rate (non-operating);
• 2mm plastic walls (1.3mm is typical for most systems).

Regulatory requirements

• The usual US and EU EMI/EMC (Electromagnetic Interference and Compatibility) requirements will be met;
• The laptop meets IEC 60950-1, EN 60950-1, and CSA/UL 60950-1 specifications. It also complies with UL 1310 and UL 498. In order to guarantee the safety of children using the laptop, it also passes ASTM F 963;
• The external power adapter complies with IEC, EN, and CSA/UL 60950-1;
• The removable battery pack complies with IEC, EN, and CSA/UL 60950-1 and UL 2054;
• RoHS (Restriction of Hazardous Substances Directive – EU) compliant.