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Chapter 2---System Description
IIC_DATA IIC data line. Serial line for synchronous data transfer of the following
data between Video Processor Board and SCB board. I=Input,
O=Output.
I BEAM CURRENT
I OK DETECT
O RED_CONT
O GRN_CONT
O BLU_CONT
O BRIGHTNESS
O RED_G2
O BLU_G2
O GRN_G2
O WHT_BOOST
O BLK_BOOST
OUTPUTS DESCRIPTION
OVERLAY Overlay control signal
/IIC_INT IIC interrupt line.
RED_OVER Red signal of on-screen menu and/or internal test pattern
GRN_OVER Similar to RED_OVER
BLU_OVER Similar to RED_OVER
BLU_THRES Threshold correction information for blue. Real time data at 0 volt to
1 volt.
GRN_THRES
Similar to BLU_THRES
RED_THRES
Similar to BLU_THRES
BLU_SENS Sensitivity correction information for BLU. Real time data at O volt to
1 volt.
GRN_SENS Similar to BLU_SENS
RED_SENS Similar to BLU_SENS
Raster Timin
g
Generator
INPUTS DESCRIPTION
SOURCE_
VALID
This signal indicates a new source (or valid). A high indicates a valid
stable signal and low indicates change in input signal.
ODD_FIELD Square wave with 50 % duty cycle which is low during the odd field
of an interlace signal. This signal is high for noninterlaced signals.
280_CLK Square wave signal, 50 % duty cycle, 280 times the frequency of
horizontal sync. This clock is synchronized to the horizontal sync.
2-36 Model 200 Service Manual