Nuvoton NUC970 series, Technical Reference Manual, Page: 1036 / 1251

NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 1036 - Revision V1.30
NUC97
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Graphic Engine Miscellaneous Control Register
Register Offset R/W Description Reset Value
GE2D_MISCTL 0x05C R/W Graphic Engine Miscellaneous Control Register 0x0000_0000
31 30 29 28 27 26 25 24
LNEPTN/ABLDFCT
23 22 21 20 19 18 17 16
LNEPTN/ABLDFCT
15 14 13 12 11 10 9 8
FIFOSTS EMPTY FULL BLTSTS BUSY
7 6 5 4 3 2 1 0
GE2DRST FIFORST BPP BLTMD BLTTYP
Bits Description
[31:16] LNEPTN/ABLDFCT
Line Style Pattern or Alpha Blending Factor
In Bresenham line drawing mode, this field indicates the 16-bit line style pattern.
In BitBLT mode, this field indicates the alpha blending factor. The bit [31:24] indicates the
alpha blending factor Ks for source data while bit [23:16] indicates the alpha blending factor
Kd for destination date.
[15:12] FIFOSTS
GE2D FIFO Counter Status
This field shows how many FIFO entries occupied by valid data.
The
value “0000” indicates the FIFO is empty while value “1000” indicates the FIFO is full.
[11] EMPTY
FIFO Empty Status
0 = FIFO is not empty.
1 = FIFO is empty.
[10]
FULL
FIFO Full Status
0 = FIFO is not full.
1 = FIFO is full.
[9]
BLTSTS
GE2D BitBLT Operation Complete Status
0 = No BitBLT operation or BitBLT operation didn
’t complete yet.
1 = BitBLT operation completed.
[8]
BUSY
GE2D Operation Status
0 = GE2D is ready for new operation.
1 = GE2D is busy.
[7] GE2DRST
GE2D Reset
0 = No operation.
1 = Reset GE2D.