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DocuColor 12/DCCS50
Image Processing, Print Interface
Principles of Operation
Reissue
Image Processing
Refer to Chapter 6 - Imaging, in the Principles of Operation for the DocuColor 12 and BSD 16.1
for more information on how the following PWBAs perform signal flow and Image Processing:
• Half Tone PWBA
• Post IPS PWBA
• VSEL Base PWBA
• VSEL Extension PWBA
Print Interface
Figure 1 IDFE Print Interface Block Diagram
The print interface between the DC CS50 and the IDFE is shown in Figure 1
. The signals are
as follows:
• VIDEO DATA ODD and VIDEO DATA EVEN - Each is a set of eight parallel lines which
provide th
e print data to the IOT.
• TAG ODD and TAG EVEN - Each is a set of four parallel lines which provides auxiliary
data fo
r images sent using YMCK color space.
• nPAGE REQ - The IDFE must provide an entire print page of data to the IOT during the
active (
negative) period of this signal.
• nLINE REQ - The IDFE must provide a pair of data lines
during the active (negative)
period of this signal.
• VCLK - The IOT uses this signal to sample the video data and tag information.
• nVALID - This indicates that the data on the video data and tag lines is valid and may be
sampled.
T
he odd and even data and tag buses are used simultaneously to pass 600 dpi images. Either
the
even or odd busses can be used individually to pass a 400 dpi image.
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