Toshiba TLP511E, TLP510E, TLP510U, TLP511U Video Demodulation Block, Terminal function of TC9090AN

7-3. Video Demodulation Block Table 7-3-1 Terminal function of TC9090AN

7-3-1. Y/C Separation Circuit

Pin

Name

Function

No.

This circuit separates Y and C signals from a composite

1

VREFH

ADC bias

video signal. Fig. 7-3-1 shows the pin configuration of

2

VSS1

ADC GND

TC9090AN and Fig. 7-3-2 shows the block diagram.

3

ADIN

Video input

The composite video signal enters pin 3. A fsc (3.58/

4

VDD1

ADC VDD

4.43 MHz) developed from the video/color IC enters pin

5

VREFL

ADC bias

19 and is converted into a 4fsc of the drive clock

6

BIAS1

ADC bias

frequency inside the IC. The composite video signal

7

P/S

Selection function control

entered is processed at a rate of the clock frequency of

8

SDA

I2C bus clock input

the IC and output as Y and C signal.

9

SCL

I2C bus data input, check output

10

RESET

I2C bus reset

VREFH

1

28

VSS4

11

TEST1

Test terminal

VSS1

2

27

VDD4

12

TEST2

Test terminal

ADIN

3

26

VREF1

13

KILLER

Clock killer switch

VDD1

4

25

YOUT

14

PLLSEL

Selection input clock

VREFL

5

24

BIAS2

15

VDD3

Digital VDD

BIAS1

6

23

COUT

16

VSS3

Analog GND

P/S

7

22

BIAS3

17

VSS2

PLL GND

SDA

8

21

2/1VDD

18

VDD2

PLL VDD

SCL

9

20

VFIL

19

CKIN

Clock input

RESET

10

19

CKIN

20

VFIL

VCO filter

TEST1

11

18

VDD2

21

2/1 VDD

Line memory bias

TEST2

12

17

VSS2

22

BIAS3

DAC bias

KILLER

13

16

VSS3

23

COUT

C output

PLLSEL

14

15

VDD3

24

BIAS2

DAC bias

25

YOUT

Y output

Fig. 7-3-1 Pin configuration of TC9090AN

26

VREF1

DAC bias

27

VDD4

DAC VDD

28

VSS4

DAC GND

Composite

ADC

LINE

VERTICAL EDGE

CORING

video signal 2

MEMORY

ENHANCE CIRCUIT

CIRCUIT

8 bits

CLAMP

+

+

PEDESTAL

YDAC

25 Y

CLIP

8 bits

output

COLOR KILLER CIRCUIT

4.43 MHz NTSC

BPF

BPF

DYNAMIC

1 LINE DOT

23 C

BPF

COMB

IMPROVE

BPF

CDAC

FILTER

CIRCUIT

8 bits

output

BPF

Clock 19

PLL

4 FSC

I2C BUS

8

9

Bus

Fig. 7-3-2 Block diagram of TC9090AN

7-5