SH7205 Datasheet, PDF (1408/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 26 2D Graphics Engine (2DG)
Initial
Bit
Bit name Value
R/W Description
19 to 16 AFTER_A 0000
R/W Alpha-Value Replacement Data Used after Blending
(α)
These bits set alpha-value replacement data used
after blending (α) = α after.
15 to 10 
Undefined R
Reserved
The read value is undefined. The write value should
always be 0.
9, 8
FBFA
00
R/W Blending Coefficient Select
These bits set a value for blending coefficient.
For the combination, see the following table.
7 to 5 
Undefined R
Reserved
The read value is undefined. The write value should
always be 0.
4
GALFA
0
R/W Global ALPHA
This bit sets to turn on or off the global ALPHA. Only
the α value after blending can be changed to the
AFTER_A bit.
0: Turns off (α dc = α out)
1: Turns on (α dc = AFTER_A bit)
3 to 1 
Undefined R
Reserved
The read value is undefined. The write value should
always be 0.
0
GCOLR
0
R/W Global Color
This bit sets to turn on or off the global color.
0: Turns off (Ca1 = Ca)
1: Turns on (Ca1 = GR_BRDCOL)
Note: For symbols above, see figure 26.23.
Rev. 1.00 Mar. 25, 2008 Page 1376 of 1868
REJ09B0372-0100