SingMai Electronics
PT9 User Manual Revision 0.3
Page 3 of 38
Contents
Revisions .................................................................................................................................................. 2
Contents ................................................................................................................................................... 3
Tables ....................................................................................................................................................... 3
Figures ...................................................................................................................................................... 3
1.
Introduction ................................................................................................................................... 5
2.
PT9 Module description................................................................................................................. 6
3.
Signal Interconnections ................................................................................................................. 7
4.
Signal Levels ................................................................................................................................... 9
5.
Test signals ................................................................................................................................... 10
6.
Technical Overview ....................................................................................................................... 11
PT9_encoder.v ................................................................................................................................... 11
PT9_Register_control.v ..................................................................................................................... 11
PT9_BT656_receiver.v ....................................................................................................................... 11
PT9_SPG.v .......................................................................................................................................... 11
PT9_Subcarrier_gen.v ....................................................................................................................... 12
PT9_Chroma_modulator.v ................................................................................................................ 12
PT9_ROM.v ........................................................................................................................................ 12
PT9_output_proc.v ............................................................................................................................ 12
PT9_Comb_filter.v ............................................................................................................................ 14
ram_infer_generic.v ......................................................................................................................... 14
7.
Cross-colour reduction ................................................................................................................. 15
8.
Register interface ........................................................................................................................ 19
9.
Register descriptions ................................................................................................................... 20
10.
Horizontal timing registers ...................................................................................................... 23
11.
Default Register Settings............................................................................................................. 25
12.
Interfacing to a DAC ..................................................................................................................... 27
13.
Specification ............................................................................................................................. 28
14.
Measurements .......................................................................................................................... 29
Tables
Table 1 PT9 Altera FPGA resource requirements ................................................................................... 5
Table 2 PT9 module heirachy. ................................................................................................................. 6
Table 3 Input/Output signals ................................................................................................................... 7
Table 4 BT656 Signal Levels .................................................................................................................... 9
Table 5 BT656 test waveform (525 line) ............................................................................................... 10
Table 6 BT656 test waveform (625 line) .............................................................................................. 10
Table 7 Register descriptions ................................................................................................................ 22
Table 8 Default Register settings ......................................................................................................... 26
Table 9 PT9 Specifications. ................................................................................................................... 28
Figures
Figure 1 PT9 Interconnection diagram. .................................................................................................. 7
Figure 2 CVBS output levels ................................................................................................................... 9
Figure 3 PT9 Block Diagram. .................................................................................................................. 11
Figure 4 Chroma modulation filter. ....................................................................................................... 12
Figure 5 Luma interpolation filter frequency response. ....................................................................... 13
Figure 6 Sinx/x filter frequency response. ............................................................................................ 13
Figure 7 NTSC Pre-emphasis filter. ........................................................................................................ 14
Figure 8 PAL pre-emphasis filter. .......................................................................................................... 14
