User manual

Onyx RGB/Sync Analog to Digital Conversion

GB to Analog Conversion

he selected RGB signals enter the D-board via pins 4, 8, and 12 of the connector

ync Processing

he horizontal and vertical sync signals enter the D-Board via pins 16 and 18 of the

f the

Figure 16 - D Board

J1/DG1. IC9869 performs analog to digital conversion and the resulting digital data

output to IC9501. The purpose and operation of IC9501 are discussed in a later sectio

of this manual.

connector J1/DG1. On the D-Board, the level shifter IC, IC9850, changes their logic

Level from 5V to 3.3V. The output signals are applied to the Sync Processor IC, IC97

for selection between RGB sync and LVDS sync (not shown in the diagram). The

selected sync signals are output to IC9869 for analog to digital conversion. IC9869

produces the digital sync and clock signals necessary for controlling the operation o

discharge control circuit, which is also located inside IC9701. This IC produces the

Sustain control pulses, the Scan control pulses, and the Data timing pulse for the da

drive circuit boards.