M52390FP Просмотр технического описания (PDF) - Renesas Electronics

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M52390FP

NTSC/PAL Encoder

Renesas Electronics 

M52390FP

Usage Precautions

(1) Typical values for input signals

(2) Setting the Free Run frequency

This IC generates the fsc by means of the VCXO circuit.

Consequently, the VCXO oscillation frequency must always be set to fsc before the IC is used, by following the

procedure outlined below.

1. Connect [9] (VIDEO IN) to GND, and set the Free Run mode.

2. Set the [2] (OFFSET R) voltage when SYNC was input to [4] (C. SYNC IN) to V4, and apply a voltage of V4 = 0.5

V to [4] (OFFSET R).

3. Fix C.[2] (SYNC IN) in the High state. (5 V applied)

4. Adjust the output frequency of [5] (TRAP) to the trimmer capacitor of [7] (VCXO IN), and set it to fsc.

Rev.1.0, Sep.22.2003, page 17 of 22

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