Cpu; Extended Ipu (Edit Machine Only) - Ricoh A66 Service Manual

IMAGE PROCESSING

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)

Extended IPU Block Diagram
C P U
100 x 100 dpi.
33 x 33 dpi
G
R G B
Separation
Signal
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.
A166/A187/A189
D R A M
2 M B
DRAM Interface
4 bit
Image
Image
Processing for
Processing for
Closed Loop
Editing
Edting
Image Creation for Editing
Color Conversion, Color Background,
Painting, Single Color
2 M B
400 x 200dpi
1 bit
Area Data
Processing
Process Code
2-62
R G B
Separation
Signal
SM