Mitsubishi Electronics WS-48613, WS-65513 manual Chapter Control Circuitry, Basic µPC Requirements

Chapter 4

Control Circuitry

As in the two earlier integrated HDTV chassis, V19 and V21, the V23 uses two Microprocessors in the Control circuitry.

1)TV µPC … controlling the analog circuitry.

2)DM µPC … controlling the digital circuitry.

The two µPCs constantly communicate with each other. User commands are input to the TV µPC. Digital com- mands are forwarded from the TV µPC to the DM µPC. The TV µPC generates Control commands from two sources.:

1)User commands from the front panel or remote control

2)Commands from the DM µPC.

Even though circuitry is becoming more complex, the same basic requirements must be met for a µPC to op- erate.

Basic µPC Requirements

Figure 4-1illustrates the four basic requirements for the TV µPC operation in the V23.

1)DC Supply … 3.3V-ES and 5VS.

2)Ground Returns … pins 8, 9 and 14.

3)Timing Signal … 15 mHz Clock Oscillator

4)Reset circuitry … sets the µPC to its nominal starting point

There is similar circuitry for the DM µPC. Since the DM Module is considered a replaceable component

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