ml87v2104 Oki Semiconductor, ml87v2104 Datasheet - Page 24

• Manufacturer Part Number: ml87v2104
• Description: Display Controller With Built-in Display Memory And Jpeg
• Manufacturer: Oki Semiconductor

2.4.3 Rotation Processing in Block
OKI Semiconductor
Copy source(Xfrom_adrs)
The copy controller rotates the rectangle area specified by the host CPU, and copies it into an area of the copy
destination.
C data when rotating 90° or 270° is thinned out and its position is adjusted.
<<Rotation angles>>
<<Host CPU specification contents>>
Rectangle area start address of copy source (Xfrom_adrs, Yfrom_adrs)
Rectangle area size of copy source (Xsize, Ysize)
Rotation angle (Angle)
Start address of copy destination (Xto_adrs, Yto_adrs)
<<Rectangle specification restriction items>>
Clockwise rotation: 0°, 90°, 180°, 270°
Minimum pixel unit for rotation processing: 16 pixels x 16 lines
Rectangle area start address unit of copy source:
Rectangle area start address unit of copy destination:
Horizontal direction:
Vertical direction:
Horizontal direction:
Vertical direction:
Figure 2.4.3 Example of Copy Destination Coordinate Specification and
(specified coordinates)
(Xto_adrs, Yto_adrs)
Copy destination
270° rotation
(Yfrom_adrs)
Copy source
Processing Sequence for Copy by Rotating
4 lines
16 pixels
16 pixels
4 lines
Xsize
180° rotation
16×16 pixels
Ysize
Buffer memory area
0° rotation
90° rotation
PEDL87V3116-02
ML87V3116
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