ml87v2104 Oki Semiconductor, ml87v2104 Datasheet - Page 22

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

2.4 Rectangle Copy Controller
2.4.1 General Description
OKI Semiconductor
The rectangle copy controller reads data from the specified rectangle area (copy source), reduces and/or rotates
it, and writes it into another specified area (copy destination).
Specify the start addresses (X start, Y start) (upper left coordinates) of the copy source and copy destination
and the rectangle size (X size, Y size), and perform a copy operation using a startup command.
When copying, either reduction or rotation can be specified.
For the reduction magnification, x1 (no reduction), x1/2, x1/8, x1/16, or x1/32 can be selected.
For rotation, 0 deg. (no rotation), 90 deg., 180 deg. or 270 deg. (all clockwise rotations) can be selected.
The rectangle size of the copy destination is set as the size calculated from the rectangle size of the copy source
according to the reduction/rotation function.
Reduction and rotation cannot be specified at the same time.
Also, data buffer access from the host CPU goes through this rectangle copy controller.
When writing from the host, specify the host as the copy source, and also specify the start address of the copy
destination and the rectangle size. When continuous writes are performed from the host, data is sequentially
written into the specified rectangle area.
When reading from the host, specify the host as the copy destination, and also specify the start address of the
copy source and the rectangle size. When continuous reads are performed from the host, data is sequentially
read from the specified rectangle area.
No.
1
2
3
4
Rotate
Reduce
Fill
Host Access
Function name
Rotate data in a rectangle area in the Data
it into an area of the copy destination.
<<Rotation angles>>
Clockwise rotation: 0°, 90°, 180°, 270°
Reduce data in a rectangle area in the Data Buffer in both
the horizontal and vertical directions, and copy it into an
area of the copy destination.
<<Reduction rates>>
Horizontal: x1/2, x1/4, x1/8, x1/16, x1/32
Vertical: x1/2, x1/4, x1/8, x1/16, x1/32
Fill a rectangle area in the Data Buffer with the color data
(Y, Cb, Cr) specified from the host CPU.
Read data in a rectangle area in the Data Buffer by the
host CPU.
Also, write data sent from the host CPU into a rectangle
area in the Data Buffer
Table 2.4.1 Copy Function List
Functional description
.
Buffer,
and copy
PEDL87V3116-02
ML87V3116
Note
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