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GS4910BCNE3 Datasheet(PDF) 4 Page - Gennum Corporation |
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GS4910BCNE3 Datasheet(HTML) 4 Page - Gennum Corporation |
4 / 113 page GS4911B/GS4910B Data Sheet 36655 - 2 April 2006 4 of 113 Contents Key Features.................................................................................................................1 Applications...................................................................................................................1 Description ....................................................................................................................1 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 ...................................................................................25 2. Electrical Characteristics.........................................................................................29 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. Detailed Description ................................................................................................36 3.1 Functional Overview .....................................................................................36 3.2 Modes of Operation ......................................................................................36 3.2.1 Genlock Mode......................................................................................37 3.2.2 Free Run Mode....................................................................................40 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.......................................................................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 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 |
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