CDB4954 データシートの表示（PDF） - Cirrus Logic

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CDB4954

NTSC/PAL Digital Video Encoder

Cirrus Logic 

CS4954 CS4955

TABLE OF CONTENTS

1. CHARACTERISTICS AND SPECIFICATIONS ........................................................................................6

AC & DC PARAMETRIC SPECIFICATIONS ............................................................................................6

RECOMMENDED Operating Conditions .......................................................................................................6

THERMAL CHARACTERISTICS ..............................................................................................................6

DC CHARACTERISTICS ..........................................................................................................................6

AC CHARACTERISTICS ..........................................................................................................................8

TIMING CHARACTERISTICS ...................................................................................................................9

2. ADDITIONAL CS4954/5 FEATURES .....................................................................................................11

3. CS4954 INTRODUCTION ......................................................................................................................11

4. FUNCTIONAL DESCRIPTION ...............................................................................................................11

4.1 Video Timing Generator ...............................................................................................................11

4.2 Video Input Formatter ..................................................................................................................12

4.3 Color Subcarrier Synthesizer .......................................................................................................12

4.4 Chroma Path ................................................................................................................................12

4.5 Luma Path ....................................................................................................................................13

4.6 RGB Path and Component YUV Path ..........................................................................................13

4.7 Digital to Analog Converters ........................................................................................................13

4.8 Voltage Reference .......................................................................................................................14

4.9 Current Reference ........................................................................................................................14

4.10 Host Interface ...............................................................................................................................14

4.11 Closed Caption Services ..............................................................................................................14

4.12 Teletext Services ..........................................................................................................................15

4.13 Wide-Screen Signaling Support and CGMS ................................................................................15

4.14 VBI Encoding ...............................................................................................................................15

4.15 Control Registers .........................................................................................................................15

4.16 Testability .....................................................................................................................................15

5. OPERATIONAL DESCRIPTION ............................................................................................................15

5.1 Reset Hierarchy ...........................................................................................................................15

5.2 Video Timing ................................................................................................................................16

5.2.1 Slave Mode Input Interface ...............................................................................................16

5.2.2 Master Mode Input Interface .............................................................................................16

5.2.3 Vertical Timing ...................................................................................................................17

5.2.4 Horizontal Timing ..............................................................................................................17

5.2.5 NTSC Interlaced ................................................................................................................17

5.2.6 PAL Interlaced ...................................................................................................................17

5.2.7 Progressive Scan ..............................................................................................................18

5.2.8 NTSC Progressive Scan ...................................................................................................18

5.2.9 PAL Progressive Scan ......................................................................................................19

5.3 ITU-R.BT656 ................................................................................................................................19

5.4 Digital Video Input Modes ............................................................................................................21

5.5 Multi-standard Output Format Modes ..........................................................................................21

5.6 Subcarrier Generation ..................................................................................................................22

5.7 Subcarrier Compensation ............................................................................................................23

5.8 Closed Caption Insertion ..............................................................................................................23

5.9 Programmable H-sync and V-sync ..............................................................................................24

5.10 Wide Screen Signaling (WSS) and CGMS ..................................................................................24

5.11 Teletext Support ...........................................................................................................................24

5.12 Color Bar Generator .....................................................................................................................26

5.13 VBI encoding ................................................................................................................................27

5.14 Super White/Super Black support ................................................................................................27

5.15 Interrupts ......................................................................................................................................27

5.16 General Purpose I/O Port .............................................................................................................27

6. FILTER RESPONSES ............................................................................................................................29

7. ANALOG ................................................................................................................................................32

7.1 Analog Timing ..............................................................................................................................32

7.2 VREF ............................................................................................................................................32

7.3 ISET .............................................................................................................................................32

7.4 DACs ............................................................................................................................................32

7.4.1 Luminance DAC ................................................................................................................32

7.4.2 Chrominance DAC ............................................................................................................33

7.4.3 CVBS DAC ........................................................................................................................33

7.4.4 Red DAC ...........................................................................................................................33

DS278F6

3

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