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GS4911B 데이터시트(PDF) 5 Page - Gennum Corporation

부품명 GS4911B
상세설명  HD/SD/Graphics Clock and Timing Generator with GENLOCK
Download  119 Pages
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제조업체  GENNUM [Gennum Corporation]
홈페이지  http://www.gennum.com
Logo GENNUM - Gennum Corporation

GS4911B 데이터시트(HTML) 5 Page - Gennum Corporation

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GS4911B/GS4910B HD/SD/Graphics Clock and Timing
Generator with GENLOCK
Data Sheet
36655 - 5
June 2009
5 of 119
Contents
Key Features........................................................................................................................................................1
Applications.........................................................................................................................................................1
Description...........................................................................................................................................................1
Revision History .................................................................................................................................................4
1. Pin Out...............................................................................................................................................................8
1.1 GS4911B Pin Assignment ...............................................................................................................8
1.2 GS4910B Pin Assignment ...............................................................................................................9
1.3 Pin Descriptions ............................................................................................................................. 10
1.4 Pre-Programmed Recognized Video and Graphics Standards ...................................... 20
1.5 Output Timing Signals ................................................................................................................. 26
2. Electrical Characteristics ......................................................................................................................... 30
2.1 Absolute Maximum Ratings ....................................................................................................... 30
2.2 DC Electrical Characteristics ..................................................................................................... 30
2.3 AC Electrical Characteristics ..................................................................................................... 33
3. Detailed Description.................................................................................................................................. 37
3.1 Functional Overview .................................................................................................................... 37
3.2 Modes of Operation ...................................................................................................................... 37
3.2.1 Genlock Mode..................................................................................................................... 38
3.2.2 Free Run Mode ................................................................................................................... 41
3.3 Output Timing Format Selection .............................................................................................. 42
3.4 Input Reference Signals ............................................................................................................... 43
3.4.1 HSYNC, VSYNC, and FSYNC.......................................................................................... 43
3.4.2 10FID ..................................................................................................................................... 44
3.4.3 Automatic Polarity Recognition ................................................................................... 45
3.5 Reference Format Detector ........................................................................................................ 45
3.5.1 Horizontal and Vertical Timing Characteristic Measurements ......................... 45
3.5.2 Input Reference Validity................................................................................................. 46
3.5.3 Behaviour on Loss and Re-acquisition of the Reference Signal......................... 47
3.5.4 Allowable Frequency Drift on the Reference .......................................................... 49
3.6 Genlock ............................................................................................................................................. 50
3.6.1 Automatic Locking Process ............................................................................................ 50
3.6.2 Manual Locking Process.................................................................................................. 54
3.6.3 Adjustable Locking Time................................................................................................. 58
3.6.4 Adjustable Loop Bandwidth .......................................................................................... 58
3.6.5 Locking to Digital Timing from a Deserializer ......................................................... 60
3.7 Clock Synthesis .............................................................................................................................. 61
3.7.1 Video Clock Synthesis...................................................................................................... 61
3.7.2 Audio Clock Synthesis (GS4911B only)...................................................................... 63
3.8 Video Timing Generator .............................................................................................................. 67
3.8.1 10 Field ID Pulse................................................................................................................. 67
3.8.2 Audio Frame Synchronizing Pulse (GS4911B only)............................................... 68
3.8.3 USER_1~4............................................................................................................................. 69


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