Technology Industry
Industry: Email Alert RSS FeedVGA controller IC provides RAMDAC and bus interface on chip. (Cirrus Logic Inc.'s CL-GD5410 integrated circuit) (product announcement)
EDN, October, 1991 by Wright, Maury
The CL-GD5410 VGA controller IC integrates RAMDAC and bus-interface circuits and supports color and monochrome display applications. In fact, you can build a minimally configured 3-chip graphics card using the VGA IC and two dynamic RAMs (DRAMs). The high level of integration makes the IC ideal for use on low-cost VGA cards or in mother-board VGA applications. The IC also provides super VGA resolutions, such as 1024X768 pixels.
Fig 1 depicts the VGA IC used in a typical VGA application. Designs only require video memory, a BIOS, and a crystal (not shown) in addition to the VGA IC to implement a complete controller. You can also cobine the VGA BIOS with the system BIOS to further reduce chip count.
The IC has a dual-frequency synthesizer that...
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