M52347SP datasheet(7/17 Pages) RENESAS

7 / 17 page

M52347SP/FP

Rev.2.00 Sep 14, 2006 page 7 of 16

Pin Description

Pin No.

Name

DC Voltage

(V)

Peripheral Circuit

Function

H.STATE

0 VDC or

5 VDC

20 k

Ω

Logic output pin for horizontal

synchronous signal

When pin 6 input signal is POSI,

outputs "H"; when NON, outputs "L";

and when NEG, outputs "H".

V.STATE

0 VDC or

5 VDC

Same as pin 1

Logic output pin for vertical

synchronous signal

When pin 8 input signal is POSI,

outputs "H"; when NON, outputs "L";

and when NEG, outputs "H".

CLAMP

2.2 V when

open

22 k

Ω

20 k

Ω

20 k

Ω

1.3 V

3.1 V

0.1 mA

28 k

Ω

This SW is available to change the

generating position of clamp pulse for

input signal. (See Table 2.)

VTH L = 0 to 1 V

VTH M = 1.6 to 2.8 V

VTH H = 3.4 to 5 V

GREEN

2.8 V

when open

1 k

Ω

1 k

Ω

3.5 V

GREEN (SYNC ON VIDEO) input pin

Input with negative sync.

Comparison of pin 4 input signal and

reference voltage within the IC

performs synchronous separation.

GND



Grounding

COMP/H

2.5 V

when open

0.3 mA

20 k

Ω

20 k

Ω

10 k

Ω

2.8 V

10 k

Ω

2.5 V

10 k

Ω

2.2 V

1.5 k

Ω

1.5 k

Ω

Composite sync/H sync input pin.

Bias is approx. 2.5 V and impedance

is 10 k

Ω.

The internal double threshold

comparator is used for shaping

waveform and detecting polarity.

Optimum input amplitude is 0.6 VP-P

at pin 6. Up to approx. 50% of duty,

waveform shaping and polarity

detection can be done.

COMP/H

DET

2.5 V

when open

(no signal)

20 k

Ω

20 k

Ω

2.5 V

2.8 V

2.2 V

75 k

Ω

12 k

Ω

12 k

Ω

External capacitance is required as a

filter pin for detecting polarity and

detecting non-input. As the value is

larger, the ripple is smaller and less

malfunction occurs. However, this

lowers the response speed of

detection.

V IN

2.5 V

when open

Same as pin 6

V sync input pin

Same as pin 6

V DET

2.5 V

when open

(no signal)

Same as pin 7

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