Service manual

4.6 CPU
The CPU (16-bit) controls the image data and the timing in the scanner and
IPU sections.
4.7 EXTENDED IPU (EDIT MACHINE ONLY)
The extended IPU has the following functions:
Image processing for the display monitor, Area data processing, and Image
creation for editing
In order to process an A3 size image (which is the maximum size for the
display monitor), the extended IPU utilities two 2MB memories.
2MB
DRAM Interface
Area Data
Processing
2MB
Image
Processing for
Editing
Image
Processing for
Closed Loop
Edting
Image Creation for Editing
Color Conversion, Color Background,
Painting, Single Color
100 x 100 dpi.
33 x 33 dpi
400 x 200dpi
4 bit 1 bit
Process Code
Separation
Signal
RGB
CPU
Extended IPU Block Diagram
RGB
Separation
Signal
G
DRAM
IMAGE PROCESSING
A166/A187/A189 2-62 SM
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