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SAA7121

Digital Video Encoder (ConDENC)

Philips Electronics 

Philips Semiconductors

Digital Video Encoder (ConDENC)

Preliminary specification

SAA7120; SAA7121

PINNING

SYMBOL PIN

res.

1

SP

2

AP

3

LLC

4

VSSD1

5

VDDD1

6

RCV1

7

RCV2

8

MP7

9

MP6

10

MP5

11

MP4

12

MP3

13

MP2

14

MP1

15

MP0

16

VDDD2

17

VSSD2

18

RTCI

19

res.

20

SA

21

res.

22

res.

23

C

24

VDDA1

25

res.

26

Y

27

VDDA2

28

res.

29

CVBS

30

VDDA3

31

VSSA1

32

VSSA2

33

XTALO

34

XTALI

35

VDDA4

36

XCLK

37

I/O

DESCRIPTION

− reserved

I test pin; connected to digital ground for normal operation

I test pin; connected to digital ground for normal operation

I line-locked clock; this is the 27 MHz master clock for the encoder

I digital ground 1

I digital supply voltage 1

I/O raster control 1 for video port; this pin receives/provides a VS/FS/FSEQ signal

I/O raster control 2 for video port; this pin provides an HS pulse of programmable length or

receives an HS pulse

I

I

I

I

MPEG port; it is an input for “CCIR 656” style multiplexed Cb Y, Cr data

I

I

I

I

I digital supply voltage 2

I digital ground 2

I Real Time Control input; if the LLC clock is provided by an SAA7111 or SAA7151B,

RTCI should be connected to pin RTCO of the decoder to improve the signal quality

− reserved

I the I2C-bus slave address select input pin; LOW: slave address = 88H, HIGH = 8CH

− reserved

− reserved

O analog output of the chrominance signal

I analog supply voltage 1 for the C DAC

− reserved

O analog output of VBS signal

I analog supply voltage 2 for the Y DAC

− reserved

O analog output of the CVBS signal

I analog supply voltage 3 for the CVBS DAC

I analog ground 1 for the DACs

I analog ground 2 for the oscillator and reference voltage

O crystal oscillator output (to crystal)

I crystal oscillator input (from crystal); if the oscillator is not used, this pin should be

connected to ground

I analog supply voltage 4 for the oscillator and reference voltage

O clock output of the crystal oscillator

1997 Jan 06

4

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