MB87P2020 Datasheet, PDF (203/356 Pages) Fujitsu Component Limited. – Colour LCD/CRT/TV Controller

Graphic Processing Unit
• Large transparent areas should be avoided, instead the layer’s window size should be limited to the
smallest rectangle including all non-transparent pixels.
• Color resolution (logical color space) should be reduced to the minimal number of colors needed
simultaneously, a more colourful display can be achieved with useful CLUT entries as well. This
approach decreases the necessary memory bandwidth.
• Longer blanking periods decrease average bandwidth demands.
• For a given size and display clock dual scan displays demand a higher memory and processing band-
width.
• Displays with greater StreamFactors according to equation (20) demand higher bandwidth.
• Video display should be used with care, since it produces high memory traffic (from VIC to RAM
and from RAM to GPU). VIC provides some means to reduce to necessary bandwidth (dropping cer-
tain frames and fields).
Bandwidth Considerations
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