Intel 2700G
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Intel 2700G

Intel 2700G (Marathon) is a low power (50 mW max) graphics co-processor for the XScale PXA27x processor, announced on April 12, 2004[1]. It is built on the PowerVR MBX Lite chip design, which is a descendant from the PowerVR2 graphics technology that powered SEGA Dreamcast) and MVED1 (video) technology.

Different variants

This accelerator comes in 3 variants: The 2700G3, 2700G5 and 2700G7.

2700G3

The 2700G3 is the value version of the accelerator. It has 384 kB of on-die memory suitable for driving an HVGA (320×480) or smaller graphics display.

2700G5

The 2700G5 is the performance version of the accelerator. It has 704 kB of on-die memory suitable for driving a VGA (640×480) resolution display and decoding MPEG-4 video.

2700G7

The 2700G7 is the same as the 2700G5 but is stacked with 16 MB of local memory with a 100 MHz, 32-bit bus (maximum 400 MB/s theoretical bandwidth) in the same package.

Features

All the chips have a 75 MHz, 32-bit core shipped in BGA packaging.

Accelerated dual display

The 2700G has its own LCD controller and two LCD outputs. This allows for the XScale processor and 2700G's graphics displays to be used at the same time. The 2700G can drive an external display up to 1024×768 (with 32-bit colour) or 1280×1024 (with 16-bit colour).

2D graphics acceleration

The accelerator supports clipping, alpha blending and anti-aliasing. It also has a variety of block level transfer (BLT) functions (BitBLT, StretchBLT and CSCBLT). The 2D accelerator is capable of up to an 84 million pixels per second fill rate (150 million pixels per second claimed by intel[2]).

3D graphics acceleration

The 2700G has a complete hardware rendering pipeline and is compatible with the OpenGL ES 1.0 standard, using the common-lite profile. It features texture compression, anisotropic filtering, and per vertex fogging (fog) among other things. The 3D accelerator is capable of processing about 831 000 triangles per second (944,000 triangles per second claimed by intel)[2].

Video acceleration

The 2700G performs Inverse Zig-Zag, Inverse Discrete Cosine Transform, and Motion Compensation to speed up MPEG-1, MPEG-2, MPEG-4 and WMV video decoding. The accelerator can decode MPEG-1, 2 and WMV at 720×480 (DVD Resolution) and MPEG-4 at 640×480, both at over 30 frames per second.

Devices

The 2700G was featured in the Dell Axim X50v, Dell Axim X51v, Gigabyte GSmart t600, Pepper Pad 2 and Palm Foleo (cancelled). It was also used in some standalone signage kiosks such as the MediaStaff DS[3] and HID's, such as the Clipsal DALIcontrol DCLCD70 LCD Touch Screen Controller[4], and the Advantech UbiQ-350 and UbiQ-470[5].

As of Intel selling its XScale unit to Marvell, this device is discontinued.

See also

References

  1. ^ "Intel 2700G Chipset -- 3D Accelerator in Your Pocket". Retrieved 2019.
  2. ^ a b "Intel launches Bulverde, Marathon". Retrieved 2019.
  3. ^ "Kiosk: PFU Systems Introduces MEDIASTAFF DS Digital Signage Kiosk". Retrieved 2019.
  4. ^ "DCLCD70 LCD Touch Screen Controller" (PDF). Retrieved 2019.
  5. ^ "UBIQ-470". Retrieved 2019.

External links


  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.

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