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NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 1021 -
Revision V1.30
NUC97
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CHNIC
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NUA
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[6:5]
SRCDS
Source Data Select
00 = Display memory.
01 = System memory.
10 = GE background color.
11 = GE foreground color.
[4]
PATDT
Pattern Data Type
0 = Color (from display memory).
1 = Mono (from internal pattern registers).
[3:1]
DRAWDIR
Drawing Direction
It determines the drawing directions for BitBLT, Bresenham line, and Rotate.
For BitBLT operation,
000 = Right-down.
001 = Right-down.
010 = Left-down.
011 = Left-down.
100 = Right-up.
101 = Right-up.
110 = Left-up.
111 = Left-up.
For Bresenham line drawing operation,
000 = + X, + Y,
DX
DY
.
001 = + X, + Y,
DX
DY
.
010 = + X,
Y,
DX
DY
.
011 = + X,
Y,
DX
DY
.
100 =
X, + Y,
DX
DY
.
101 =
X, + Y,
DX
DY
.
110 =
X,
Y,
DX
DY
.
111 =
X,
Y,
DX
DY
.
For Rotate operation,
000 = Scaling Down.
001 = Rotate right 45°.
010 = Rotate left 45°.
011 = Rotate left 90°.
100 = Up-Side-Down.
101 = Rotate right 90°.
110 = Rotate 180°.
111 = Mirror or Flop.
[0]
DSTDATD
Destination Data Direction
0 = Display memory.
1 = System memory.