ECM-3711 Series
•2D Graphics Engine
The CN700 North Bridge's advanced 128-bit 2D graphics engine delivers high-speed 2D acceleration for productivity applications. The enhanced 2D architecture with direct access frame buffer capability optimizes UMA performance and provides acceleration of all color depths. MPEG Video Playback The CN700 North Bridge provides the ideal architecture for high quality MPEG-2 based video applications. For MPEG playback, the integrated video accelerator offloads the CPU by performing the motion compensation tasks, while its enhanced scaling algorithm delivers incredible full-screen video playback. The CN700 provides three “Digital Video Port” interfaces: FPDP, GDVP1, and DVP0. The Flat Panel Display Port (FPDP) implements a 24-bit / dual 12-bit interface which is designed to drive a Flat Panel Display via an external LVDS transmitter chip. The CN700 can be connected to the external LVDS transmitter chip in either 24-bit or dual-12-bit modes. A wide variety of LCD panels are supported including VGA, SVGA, XGA, SXGA+ and up to UXGA-resolution TFT color panels, in either SDR (1 pixel / clock) or DDR (2 pixels / clock) modes. Two 12-bit “Display Port” interfaces are provided (through multiplexing with AGP interface) plus a dedicated 12-bit display port interface. Multiplexing display functions with the AGP bus allows embedded systems to support an external AGP connector for future performance upgrade through the external graphics controller. It also allows add-in cards to be designed with an AGP-compatible connector for implementing the display interface logic to reduce cost in the base (CRT-only) configuration. In the value system configurations, the external AGP upgrade capability is not normally required by the system, allowing all the AGP pins to be used for implementing very flexible display functions.
Internally the CN700 North Bridge provides two separate display engines, so if two display devices are connected, each can display completely different information at different resolutions, pixel depths and refresh rates. If more than two display devices are connected, the additional displays must have the same resolution, pixel depth and refresh rate as one of the first two. The maximum display resolutions supported for one display device are listed in the table below. If more than one display is implemented (i.e., if both display engines are functioning at the same time), then available memory bandwidth may limit the display resolutions supported on one or both displays. This will be dependent on many factors including primarily clock rates and memory speeds (contact VIA for additional information).
16 ECM-3711 Series User’s Manual