NEC uPD72257, Preliminary User'S Manual

Page: 266 / 343

8.9.3.2 DRWCOLOR2 - Secondary colour register
This register defines the 32-bit ARGB value for the secondary colour, i.e. constant
colour 2.
Secondary colour is relevant only when rendering patterns, textures or using a
BC2 blendmode (see DRWCONTROL2).
Access
This register can be written in 32-bit units.
Address <DrwE_Base> + 68
H
Index
26
Initial Value 0000 0000
H
. This register is initialized by any reset.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
COLOR2A[7:0] COLOR2R[7:0]
W W
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
COLOR2G[7:0] COLOR2B[7:0]
W W
Bit Bit name Function
31 to 24 COLOR2A[7:0]
Alpha channel of colour 2
00
H
transparent
... ...
FF
H
opaque
23 to 16 COLOR2R[7:0] Red channel of colour 2
15 to 8 COLOR2G[7:0] Green channel of colour 2
7 to 0 COLOR2B[7:0] Blue channel of colour 2
Chapter 8 Drawing Engine
266
Preliminary User's Manual S19203EE1V3UM00