Intel 2700G

Intel 2700G (Marathon) is a low power (50 mW max) graphics co-processor for the XScale PXA27x processor. It is built on PowerVR MBX Lite (the successor to the graphics technology used in the SEGA Dreamcast) and MVED1 (video) technology.

Different Flavours

This accelerator comes in 3 flavors: 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 (320x480) 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 (640x480) 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 1024x768 (with 32-bit colour) or 1280x1024 (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.

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.

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 720x480 (DVD Resolution) and MPEG-4 at 640x480, both at over 30 frames per second.

Devices

Currently the 2700G is featured in the Dell Axim X50v, Dell Axim X51v, Pepper Pad 2 and Palm Foleo (cancelled).

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

ee also

* Intel XScale Processor

External links

* [http://www.xscale.jp/XSDoc/2700G/2700G_index.htm Archived 2700G Datasheets]
* [http://www.pepper.com Pepper Pad]