Chapter 2---System Description

 

 

/SEL_VIC

 

Select line for VIC. A low indicates the RGB_VIC is selected.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED_VIC

 

Video signals. about 0.7 to 1 VPP

 

 

 

 

GRN_VIC

 

 

 

 

 

 

BLU_VIC

 

 

 

 

 

 

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

Page 30
Image 30
JVC Model 200 service manual System Controller Board, Quad Input RGB VIC