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Chapter 2---System Description
/SEL_VIC Select line for VIC. A low indicates the RGB_VIC is selected.
RED_VIC
GRN_VIC
BLU_VIC
Video signals. about 0.7 to 1 VPP
H_VIC Horizontal or composite sync signals
V_VIC Vertical sync signals
System Controller Board
INPUTS DESCRIPTION
IIC_CLK IIC clock line. Unidirectional clock line for control of synchronous
data transfer over the IIC bus interface.
IIC_DATA IIC data line. Bidirectional serial line for synchronous data transfer
between system control board and the RGB_VIC.
OUTPUTS DESCRIPTION
/IIC_INT IIC interrupt line. RGB_VIC does not initiate an interrupt.
Low Voltage Power Supply
INPUTS DESCRIPTION
+5.1 V +5.1 V supply for use by RGB_VIC.
+15 V + 15 V supply for use by RGB_VIC.
-15 V -15 V supply for use by RGB_VIC.
+ 5.1 V_stby + 5.1 V stand by supply for use by RGB_VIC.
Interlocks and protection
Input: None
Outputs: None
Quad Input RGB VIC
The Quad Input RGB VIC consists of four sets of RGBHV inputs
and operates in a manner similar to a switcher. The four inputs are
multiplexed so that only one is enabled at a specific time.
Software selects the desired input channel through the IIC bus
and ensures that only one RGB VIC is enabled. When one of the
channels assigned to the Quad RGB VIC is selected, the
/SEL_VIC line to the Video Processor is enabled.
2-16 Model 200 Service Manual