Renesas SH7781 - Manual (Page 962)

19. Display Unit (DU)
Rev.1.00 Jan. 10, 2008 Page 932 of 1658
REJ09B0261-0100
Frame
buffer 2
A double-buffer function is used to switch the frame buffer between drawing side and display side
The superpositioning
order can be specified
arbitrarily.
Background color can be specified.
Frame
buffer 1
Frame
buffer 2
Frame
buffer 1
Output planes are combined
and displayed according to
the superpositioning order
and blending mode for
each plane.
Frame
buffer 4 Frame
buffer 3
Display
side
Frame
buffer 4
Figure 19.2 Block Diagram of Plane Configuration and Superpositioning