GS4910B GENNUM [Gennum Corporation], GS4910B Datasheet - Page 4

• Manufacturer Part Number: GS4910B
• Description: HD/SD/Graphics Clock and Timing Generator with GENLOCK
• Manufacturer: GENNUM [Gennum Corporation]

Contents
Key Features .................................................................................................................1
Applications...................................................................................................................1
Description ....................................................................................................................1
1. Pin Out ......................................................................................................................8
2. Electrical Characteristics .........................................................................................29
3. Detailed Description ................................................................................................36
36655 - 2
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 ...................................................................................25
2.1 Absolute Maximum Ratings ..........................................................................29
2.2 DC Electrical Characteristics ........................................................................29
2.3 AC Electrical Characteristics .........................................................................31
2.4 Solder Reflow Profiles ...................................................................................35
3.1 Functional Overview .....................................................................................36
3.2 Modes of Operation ......................................................................................36
3.3 Output Timing Format Selection ...................................................................42
3.4 Input Reference Signals ................................................................................43
3.5 Reference Format Detector ..........................................................................45
3.6 Genlock .........................................................................................................50
3.7 Clock Synthesis ............................................................................................61
3.8 Video Timing Generator ................................................................................67
3.2.1 Genlock Mode......................................................................................37
3.2.2 Free Run Mode....................................................................................40
3.4.1 HSYNC, VSYNC, and FSYNC.............................................................43
3.4.2 10FID ...................................................................................................44
3.4.3 Automatic Polarity Recognition ............................................................45
3.5.1 Horizontal and Vertical Timing Characteristic Measurements .............45
3.5.2 Input Reference Validity.......................................................................45
3.5.3 Behaviour on Loss and Re-acquisition of the Reference Signal..........47
3.5.4 Allowable Frequency Drift on the Reference .......................................49
3.6.1 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
3.7.1 Video Clock Synthesis .........................................................................61
3.7.2 Audio Clock Synthesis (GS4911B only) ..............................................63
3.8.1 10 Field ID Pulse .................................................................................67
April 2006
GS4911B/GS4910B Data Sheet
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