MB87P2020 Datasheet, PDF (100/356 Pages) Fujitsu Component Limited. – Colour LCD/CRT/TV Controller

MB87J2120, MB87P2020-A Hardware Manual
is only for understanding PP in context of GDC and represents the ULB functionality, such as command
control signals and data bus for reading and writing.
1.1.2 Function of submodules
The PE is a unit, which realizes the main function of PP, which are drawing of geometrical figures and writ-
ing compressed and uncompressed pictures into the Video RAM. The supported commands are:
• Drawing Commands
— DwLine (draw lines)
— DwRect (draw arectangular areas)
— DwPoly (draw a polygon)
• Bitmap Commands
— PutBM (write an uncompressed bitmap into Video RAM)
— PutCP (write an RLE compressed bitmap into Video RAM)
— PutTxtBM (write an uncompressed 1 bit pixel mask as a bitmap with a higher colour depth into
Video RAM)
— PutTxtCP (write an RLE compressed 1 bit pixel mask as a bitmap with a higher colour depth
into Video RAM).
The second unit in PP is the MAU. It realizes the single pixel access for reading and writing. Following
commands can be used by the programmer:
• Pixel Commands
— PutPixel (set one pixel on the display)
— PutPxFC (set one pixel with a fixed colour on the display)
— XChPixel (read-modify-write of a single pixel)
— GetPixel (read one pixel from the VideoRam)
— PutPxWd (write a 32bit data word with a number of pixels into the Video RAM; the number of
pixels depends on the colour depth of the target address).
The third execution device is the MCP. It gives a simple way for the programmer to copy rectangular areas
from the source layer to the target layer. The only command, which can be used is:
• Memory to Memory Commands
— MemCP (copy rectangular area from one layer to another)
The SDCI is a component, which manages the access to the SDC. The SDCI collects pixel adresses and data
to packages, which should be transferred to the Video RAM with one request. The addresses and data are
collected in the fifos (address and data fifo), every one of them has a size of 32bit*(64+2) words.
The Control interface is connected to the internal control bus system of the GDC, which allows the pro-
grammer to have access to the configuration registers of all sub modules or macros. All configuration reg-
isters of the PP are connected to the control bus system.
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