M37274EFSP datasheet(41/148 Pages) RENESAS

Part #	M37274EFSP

Description	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

PDF	148 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER

and ON-SCREEN DISPLAY CONTROLLER

M37274EFSP

PRELIMINARY

Notice:

This

is not

a final

specification.

Some

paramentic

limits

are

subject

to change.

MITSUBISHI MICROCOMPUTERS

Fig. 35. Sync Slice Register

(1) Clamping Circuit and Low-pass Filter

This filter attenuates the noise of the composite video signal input

from the CVIN pin. The CVIN pin to which composite video signal is

input requires a capacitor (0.1

µF) coupling outside. Pull down the

CVIN pin with a resistor of hundreds of kiloohms to 1 M . In addition,

we recommend to install externally a simple low-pass filter using a

resistor and a capacitor at the CVIN pin (refer to Figure 25).

(2) Sync Slice Circuit

This circuit takes out a composite sync signal from the output signal

of the low-pass filter. Figure 25 shows the structure of the sync slice

b7 b6 b5 b4 b3 b2 b1 b0

Sync slice register (SSL) [Address 00E3 16]

Sync Slice Register

0R W

Vertical synchronous

signal (Vsep) generating

method selection bit

(SSL7)

0, 2

Fix these bits to “1.”

After reset

Functions

Name

0: Method 1

1: Method 2

0001

0R W

3 to 6

Fix these bits to “0.”

M37274EFSP Datasheet(PDF) 41 Page - Renesas Technology Corp

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