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Renesas SH7781 User Manual

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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