Micronas SDA 6000, User Manual

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SDA 6000
PRELIMINARY DATA SHEET
Version 2.1
Display Generator
10 - 27 Micronas
Meaning of Double Width and Double Height during Transfer
The destination area can be stretched horizontally and vertically by using GA instruction
TAR.
If double width (TDW) is set to ‘1’, the graphic accelerator writes each pixel twice
horizontally to the destination area.
If double height (TDH) is set to ‘1’ in the destination output side each pixel in vertical
direction is repeated twice.
For example: If double width is set to ‘1’ and quadruple height is set to ‘1’ each pixel of
the source area needs 8 pixels of the destination area.
Note: Parameters like WIDTH_OUT, WIDTH_CLIP, HEIGHT_OUT and HEIGHT_CLIP
are still pixel related. WIDTH_OUT, HEIGHT_OUT and D_OFFSET have to be
adapted by the software to get a complete character. Clipping is not affected by
TDH and TDW.
The following table is an example of a 1-bit bitmap (30
⌠
50) which should be transferred
either in normal size or in double size to an 8 bit output format in a frame buffer with a
size of 100
⌠
200 pixels.
Note: In case of double width transfer WIDTH_OUT has to be an even number. In case
of double/quad height transfer HEIGHT_OUT has to be an even/divisable by 4
number.
TQH TDH Meaning
0 0 Normal transfer
0 1 If double height (TDH) is set to ‘1’ and quadruple height (TQH) is set
to ‘0’ in the destination output side each pixel in vertical direction is
repeated twice.
1 X If quadruple height (TQH) is set to ‘1’ on the destination output side
each pixel in vertical direction is repeated four times.
Parameters TDW = 0; TDH = 0; TQH = 0 TDW = 1; TDH = 1; TQH = 0
WIDTH_L1 100
HEIGHT_L1 200
WIDTH_IN 30
WIDTH_OUT 30 60
D_OFFSET 70 40
HEIGHT_OUT 50 100