GS2972 Datasheet, PDF (8/125 Pages) Semtech Corporation – 3G/HD/SD-SDI Serializer with Complete SMPTE Audio & Video Support

Figure 4-29: GSPI Application Interface Connection ........................................................................ 87
Figure 4-30: Command Word Format ..................................................................................................... 88
Figure 4-31: Data Word Format ................................................................................................................ 88
Figure 4-32: Write Mode .............................................................................................................................. 89
Figure 4-33: Read Mode ............................................................................................................................... 89
Figure 4-34: GSPI Time Delay .................................................................................................................... 89
Figure 4-35: Reset Pulse ............................................................................................................................. 119
Figure 5-1: Typical Application Circuit ................................................................................................ 120
Figure 7-1: Package Dimensions ............................................................................................................. 122
Figure 7-2: Marking Diagram ................................................................................................................... 123
Figure 7-3: Pb-free Solder Reflow Profile ............................................................................................ 124
List of Tables
Table 1-1: Pin Descriptions ......................................................................................................................... 11
Table 2-1: Absolute Maximum Ratings................................................................................................... 20
Table 2-2: Recommended Operating Conditions................................................................................ 20
Table 2-3: DC Electrical Characteristics ................................................................................................. 21
Table 2-4: AC Electrical Characteristics ................................................................................................. 23
Table 4-1: GS2972 Digital Input AC Electrical Characteristics ....................................................... 31
Table 4-2: GS2972 Input Video Data Format Selections................................................................... 31
Table 4-3: GS2972 PCLK Input Rates....................................................................................................... 34
Table 4-4: CEA861 Timing Formats ......................................................................................................... 38
Table 4-5: Serial Audio Input Pin Description...................................................................................... 45
Table 4-6: GS2972 Serial Audio Data Inputs - AC Electrical Characteristics............................. 46
Table 4-7: Audio Input Formats ................................................................................................................ 47
Table 4-8: GS2972 Audio Operating Mode Selection ........................................................................ 50
Table 4-9: GS2972 SD Audio Crosspoint Channel Selection ........................................................... 54
Table 4-10: Audio Source Host Interface Fields .................................................................................. 54
Table 4-11: GS2972 SD Audio Buffer Size Selection .......................................................................... 56
Table 4-12: GS2972 SD Audio Five Frame Sequence Sample Count............................................ 58
Table 4-13: GS2972 SD Audio Group 1 Audio Sample Distribution - 525 line.......................... 58
Table 4-14: GS2972 SD Audio Group 2 Audio Sample Distribution - 525 line.......................... 59
Table 4-15: GS2972 SD Audio Group 3 Audio Sample Distribution - 525 line.......................... 59
Table 4-16: GS2972 SD Audio Group 4 Audio Sample Distribution - 525 line.......................... 59
Table 4-17: GS2972 SD Audio Group 1 Audio Sample Distribution - 625 line.......................... 59
Table 4-18: GS2972 SD Audio Group 2 Audio Sample Distribution - 625 line.......................... 60
Table 4-19: GS2972 SD Audio Group 3 Audio Sample Distribution - 625 line.......................... 60
Table 4-20: GS2972 SD Audio Group 4 Audio Sample Distribution - 625 line.......................... 60
Table 4-21: Audio Interrupt Control – Host Interface Bit Description ......................................... 64
Table 4-22: Supported Video Standards................................................................................................. 72
Table 4-23: IOPROC Register Bits ............................................................................................................. 80
Table 4-24: SMPTE ST 352 Packet Data................................................................................................... 81
Table 4-25: PCLK and Serial Digital Clock Rates ................................................................................. 82
Table 4-26: GS2972 PLL Bandwidth......................................................................................................... 83
Table 4-27: GS2972 Lock Detect Indication .......................................................................................... 83
Table 4-28: Serial Digital Output - Serial Output Data Rate ............................................................ 84
Table 4-29: R_SET Resistor Value vs. Output Swing .............................................................................. 85
Table 4-30: Serial Digital Output - Overshoot/Undershoot ............................................................. 85
Table 4-31: Serial Digital Output - Rise/Fall Time............................................................................... 86
Table 4-32: GSPI Time Delay...................................................................................................................... 89
Table 4-33: GSPI AC Characteristics........................................................................................................ 90
Table 4-34: Video Core Configuration and Status Registers............................................................ 91
Table 4-35: SD Audio Core Configuration and Status Registers................................................... 100
GS2972 3G/HD/SD-SDI Serializer with Complete
SMPTE Audio & Video Support
Final Data Sheet Rev. 9
GENDOC-047479 September 2013
www.semtech.com
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