Micronas SDA 6000, User Manual

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SDA 6000
PRELIMINARY DATA SHEET
Version 2.1
Display Generator
10 - 24 Micronas
As described before, there are seven different formats on the input side of the transfer:
• 1-bit bitmap
• 2-bit bitmap
• 4-bit bitmap
• 8-bit bitmap
• 8-bit data (used for direct data transfer)
• CLUT1 input (used for drawing of filled parallelograms, rectangles, lines)
• 16-bit (4:4:4:2) RGB
CLUT1 input does not need any more detailed area description. The input value comes
directly from the address ‘0’ of CLUT1 and not from the RAM. This mode can be used
for drawing lines, filling rectangles or parallelograms. For the other input modes a more
detailed description is given below:
From the point of view of the register settings, which are used to define the source area,
the different input formats can be divided in three groups which are handled in different
ways.
Group 1: Group 2: Group3:
1-bit bitmap8-bit data16-bit pixel format (4:4:4:2)
2-bit bitmap8-bit bitmap
4-bit bitmap
Formats of group 1 are formats which define each pixel with less than a byte. Group 2
formats are formats which define each pixel by 8 bits, and group 3 formats are formats
which define each pixel by 16 bits.
Group 1:
In 1-bit bitmap, 2-bit bitmap and 4-bit bitmap input mode it is expected, that the bitmaps
are stored linearly in the memory as described in
Chapter 10.4.1 . Therefore the settings
of WIDTH_IN as well as S_OFFSET are ignored. Only the 24-bit source address pointer
S_ADDR is used. The amount of pixels which are read from the source and written to
the destination is only defined by the destination settings. The user has to take care that
the destination settings fit with the bitmap inherent alignments.
Group 2:
In this mode WIDTH_IN and S_OFFSET are also taken into account. The amount of
memory which is described by WIDTH_IN and S_OFFSET is described by numbers of
bytes.
Group 3:
In this mode WIDTH_IN and S_OFFSET are also taken into account. The amount of
memory which is described by WIDTH_IN and S_OFFSET is described by numbers of
words.
Note: The number of bytes to be read from the source area is defined by the destination
area (see below) and the transfer mode. This is why no explicit definition of height
is needed for the source.