Toshiba TLP510U, TLP511E, TLP510E, TLP511U Luminance Y Signal Process Circuit, Pin No Name Function

TDA9141 has two input terminals for the composite video/Y signal (pin 25) and C signal (pin 26), and each of the signals is automatically identified through I2C- BUS control.

		MED849
V P2	1	16	V i(R-Y)
N.C.	2	15	N.C.
GND2	3	14	V i(B-Y)
I.C.	4	13	N.C.
		TDA4665	V o(B-Y)
SAND	5	12
N.C.	6	11	V o(R-Y)
I.C.	7	10	GND1
I.C.	8	9	V P1

Fig. 7-3-6 Pin configuration of TDA4665T

Table 7-3-2 Terminal function of TDA4665T

Pin No.	Name	Function
1	VP2	+5V power supply for
		digital block
2	N.C.	Not used
3	GND2	GND (0V) for digital block
4	I.C.	Internal connection
5	SAND	Sandcastle pulse input
6	N.C.	Not used
7	I.C.	Internal connection
8	I.C.	Internal connection
9	VP1	+5V power supply for
		analog block
10	GND1	GND (0V) for analog
		block
11	Vo(R-Y)	± (R–Y) output signal
12	Vo(B-Y)	± (B–Y) output signal
13	N.C.	Not used
14	Vi(B-Y)	± (B–Y) input signal
15	N.C.	Not used
16	Vi(R-Y)	± (R–Y) input signal

±(R-Y)

16

SIGNAL

CLAMPING

±(R-Y)

LINE

SAMPLE

11

AND

LP

MEMORY

HOLD

Color

difference

Pre-amplifiers

input

signals

Addition

Output

Color

difference

stages

buffers

Output

signals

±(B-Y)

14

SIGNAL

CLAMPING

LINE

SAMPLE

12

±(B-Y)

AND

LP

MEMORY

HOLD

V P1

9

analog supply

2

N.C.

3 MHz shifting clock

TDA4665

6

N.C.

SANDCASTLE

FREQUENCY

DIVIDER

13

N.C.

5

PHASE

Sand castle

DETECTOR

BY 192

15

N.C.

DETECTOR

pulse

input

LP

6 MHz

DIVIDER

7

I.C.

CCO

BY 2

10

Digital

supply

1

3

4

8

GND 1

GND 2

V P2

Fig. 7-3-7 Block diagram of TDA4665T

MED848

7-3-3. Luminance (Y) Signal Process Circuit

The processing method differs as follows depending on type of the signal entered.

(a)For a SECAM input, it passes through a burst signal trap circuit.

(b)For a NTSC/PAL (with burst signal) input (Y/C-sepa- rated signals), the burst signal trap circuit is bypassed. It passes through a delay circuit for a phase match- ing to the color signal.

(c)For a NTSC/PAL (without burst signal) input, above trap circuit and the delay circuit are bypassed to per- form a stable color killer operation.

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