
***
Genesis Microchip Confidential ***
gm2115/25 Preliminary Data Sheet
June 2002
1
C2115-DAT-01B
Table Of Contents
1. Overview............................................................................................................................................5
1.1 gm2115/25 System Design Example...........................................................................................5
1.2 gm2115/25 Features.....................................................................................................................6
2. gm2115/25 Pinout ..............................................................................................................................7
3. gm2115/25 Pin List............................................................................................................................8
4. Functional Description.....................................................................................................................14
4.1 Clock Generation.......................................................................................................................14
4.1.1 Using the Internal Oscillator with External Crystal............................................................15
4.1.2 Using an External Clock Oscillator ....................................................................................17
4.1.3 Clock Synthesis...................................................................................................................18
4.2 Hardware Reset..........................................................................................................................20
4.3 Analog to Digital Converter (ADC)...........................................................................................20
4.3.1 ADC Pin Connection..........................................................................................................21
4.3.2 ADC Characteristics...........................................................................................................21
4.3.3 Clock Recovery Circuit ......................................................................................................22
4.3.4 Sampling Phase Adjustment...............................................................................................23
4.3.5 ADC Capture Window........................................................................................................23
4.4 Test Pattern Generator (TPG)....................................................................................................24
4.5 Input Format Measurement (IFM).............................................................................................24
4.5.1 HSYNC / VSYNC Delay....................................................................................................24
4.5.2 Horizontal and Vertical Measurement................................................................................25
4.5.3 Format Change Detection...................................................................................................26
4.5.4 Watchdog............................................................................................................................26
4.5.5 Internal Odd/Even Field Detection.....................................................................................26
4.5.6 Input Pixel Measurement....................................................................................................27
4.5.7 Image Phase Measurement .................................................................................................27
4.5.8 Image Boundary Detection.................................................................................................27
4.5.9 Image Auto Balance............................................................................................................27
4.6 RealColor Digital Color Controls..............................................................................................27
4.6.1 RealColor Flesh tone Adjustment.......................................................................................28
4.6.2 Color Standardization and sRGB Support..........................................................................28
4.7 High-Quality Scaling.................................................................................................................28
4.7.1 Variable Zoom Scaling.......................................................................................................28
4.7.2 Horizontal and Vertical Shrink...........................................................................................29
4.7.3 Moiré Cancellation .............................................................................................................29
4.8 Bypass Options ..........................................................................................................................29
4.9 Gamma Look-Up-Table (LUT) .................................................................................................29