GS3470 datasheet(4/169 Pages) SEMTECH

4 / 169 page

GS3470

Final Data Sheet

Rev.8

PDS-060500

September 2017

4 of 169

Semtech

www.semtech.com

Contents

1. Pin Out .............................................................................................................................................................. 12

1.1 Pin Assignment ................................................................................................................................ 12

1.2 Pin Descriptions ............................................................................................................................... 12

2. Electrical Characteristics............................................................................................................................. 16

2.1 Absolute Maximum Ratings ........................................................................................................ 16

2.2 Recommended Operating Conditions .................................................................................... 16

2.3 DC Electrical Characteristics ........................................................................................................ 17

2.4 AC Electrical Characteristics ......................................................................................................... 19

3. Input/Output Circuits.................................................................................................................................. 23

4. Detailed Description.................................................................................................................................... 25

4.1 Functional Overview ...................................................................................................................... 25

4.2 Device Power-Up ............................................................................................................................. 27

4.2.1 Power-Down Mode............................................................................................................. 27

4.2.2 Device Reset .......................................................................................................................... 29

4.3 Modes of Operation ........................................................................................................................ 29

4.3.1 Auto and Manual Mode .................................................................................................... 29

4.3.2 Low Latency Video Path....................................................................................................30

4.3.3 SMPTE and SMPTE Bypass Mode ................................................................................... 30

4.3.4 DVB-ASI Mode ...................................................................................................................... 31

4.4 Digital Differential Input (DDI/DDI) ........................................................................................... 31

4.5 Serial Digital Loop-Through Output .........................................................................................31

4.6 Serial Digital Retimer ...................................................................................................................... 32

4.7 External Crystal/Reference Clock ............................................................................................... 32

4.8 Lock Detect ........................................................................................................................................ 32

4.9 Parallel Data Outputs ..................................................................................................................... 33

4.9.1 Parallel Data Bus Output Levels ..................................................................................... 33

4.9.2 Parallel Output in SMPTE Mode ..................................................................................... 33

4.9.3 Parallel Output in DVB-ASI Mode .................................................................................. 34

4.9.4 Parallel Output in Data-Through Mode....................................................................... 34

4.9.5 Parallel Output Data Format Clock/PCLK Settings.................................................. 34

4.9.6 DDR Parallel Clock Timing................................................................................................ 36

4.10 Timing Signal Extraction ............................................................................................................ 38

4.10.1 Automatic Switch Line Lock Handling ...................................................................... 38

4.10.2 Manual Switch Line Lock Handling ............................................................................ 39

4.11 Programmable Multi-Function Outputs ............................................................................... 40

4.12 H:V:F Timing Signal Extraction ................................................................................................. 41

4.12.1 CEA-861 Timing Generation ......................................................................................... 43

4.13 Automatic Video Standards Detection ................................................................................. 54

4.14 Data Format Detection & Indication ...................................................................................... 58

4.14.1 SMPTE ST 425 Mapping - 3G Level A and Level B Formats................................ 59

4.15 EDH Detection ................................................................................................................................ 60

4.15.1 EDH Packet Detection (SD Only) ................................................................................. 60

4.15.2 EDH Flag Detection .......................................................................................................... 60

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