SH7205 Datasheet, PDF (1359/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 26 2D Graphics Engine (2DG)
Section 26 2D Graphics Engine (2DG)
The 2DG engine (below referred to as the 2DG) is provided as a two-dimensional graphics
accelerator that has the following functions:
alpha blending of two areas specified as rectangles followed by resizing and the output of enlarged
or reduced rectangular areas: and
the resizing of externally supplied moving pictures to the size of the display panel, followed by
composition with the output graphics plane, and outputting to VIDEO OUT (D/A converter) at a
constant rate.
The graphics data is transferred between the SDRAM and the 2DG at high speed by the DMAC
under CPU control. All of the required data, including the source and destination addresses for the
SDRAM area and the source and destination addresses for the 2DG are issued by the DMAC. The
2DG blit operations are the specified processing for the data supplied to the source buffers and the
output to the destination buffer.
26.1 Features
• Planes: Major examples (characters, graphics plane, and output plane, totally two planes)
• Acceleration: blitting with two inputs and one output, filling, bit-blitting, chromakey, logical
operations, color gradation handling, variable blending operations
• Resizing,
 Blitter: Bilinear and nearest-neighbor method are independently selectable for the
horizontal and vertical directions (conversion ratios from 1/2 to 2)
Selection of pre-filtering (as a measure against the Moire effect) on or off.
 Output block: Bi-cubic algorithm in the horizontal direction (conversion ratios: from 1/3 to
1)
• Moving picture input: BT656 format (NTSC/PAL system) input (requiring both the VIHSYNC
and VIVSYNC signal inputs.)
• Superimposition on moving pictures: Alpha blending of the graphics plane and moving
picture, followed by constant-rate output in RGB666 format
• Input pixel formats for blit blocks: αRGB444 (16 bits), αRGB555 (16 bits), or α(4 bits)
• Output pixel formats for blit blocks: αRGB444 (16 bits), or αRGB555 (16 bits)
Rev. 1.00 Mar. 25, 2008 Page 1327 of 1868
REJ09B0372-0100