Altera Serial Digital Interface (SDI) MegaCore Function Manuale Utente Pagina 97
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Chapter 4: SDI Audio IP Cores 4–9
SDI Audio Embed MegaCore Function
February 2013 Altera Corporation Serial Digital Interface (SDI) MegaCore Function
User Guide
Video Status Register
7:0 Active channels RO
Reports the detected video input standard.
Bits[7:5] = Picture structure code.
Defined values for picture structure code are:
001b
= 486 or 576 line SD-SDI
100b
= 720 line HD-SDI
101b
= 1080 line HD-SDI
010b
= 1080 line 3G-SDI
Bit[4] = 0b—Interlace or segmented frame, 1b—Progressive.
Bits[3:0] = Frame rate code.
Defined values for frame rate code (in Hz) are:
0010b
= 23.97
0011b
= 24
0101b
= 25
0110b
= 29.97
0111b
= 30
1001b
= 50
1010b
= 59.94
1011b
= 60
Audio Status Register
7:0 Unused — Reserved for future use.
Channel Status Control Registers
7:0 CS mode select RW
When set to
00b
, the core keeps the existing channel status data.
When set to
01b
, the core replaces the channel status data with
default values.
When set to
10b
, the core replaces the data with the contents of the
appropriate channel status RAM.
The following bits correspond to the number of audio groups you
specify:
■ Bit [1:0] = Audio group 1
■ Bit [3:2] = Audio group 2
■ Bit [5:4] = Audio group 3
■ Bit [7:6] = Audio group 4
Sine Channel n Frequency
7:0 Sine channel frequency RW Defines the frequency of the generated audio.
Channel Status RAM
7:0 Channel status data WO
Write accesses within the address range 10h to 3Fh to the channel
status RAM. This field returns the 24 bytes of channel status for X
channels starting at address 10h to 27h, and the 24 bytes of channel
status for Y channels starting at address 28h to 3Fh.
Table 4–9. SDI Audio Embed MegaCore Function Register Map
Bit Name Access Description
- User Guide 1
- Contents 3
- Chapter 4. SDI Audio IP Cores 4
- Appendix A. Constraints 5
- Appendix B. Clocking 5
- Features 7
- Release Information 8
- Device Family Support 8
- General Description 9
- Notes to Table 1–5: 10
- OpenCore Plus Evaluation 11
- Resource Utilization 12
- 2. Getting Started 15
- Design Flow 16
- SDI Walkthrough 17
- Parameterizing 19
- Setting Up Simulation 20
- Generating Files 20
- - SD 270 Mbps 22
- - HD 1.485 Gbps 22
- - 3G 2.97 Gbps 22
- Simulating the Design 23
- Specifying Constraints 25
- Multiple Channels 26
- Compiling the Design 28
- Programming a Device 28
- Setting Up Licensing 29
- 3. Functional Description 31
- Block Description 32
- HD-SDI LN Insertion 34
- Scrambling and NRZI Coding 35
- Transceiver Clock 35
- Receiver 36
- Word Alignment 38
- Video Timing Flags Extraction 39
- RP168 Switching Compliance 39
- HD-SDI LN Extraction 40
- HD-SDI CRC Checking 40
- Accessing Transceiver 40
- Transmitter 42
- Transmitter Clocks 42
- Receiver Clocks 43
- Notes to Table 3–5: 44
- Notes to Figure 3–8: 44
- Figure 3–9. Receiver Clocks 46
- rxdata 47
- Note to Table 3–7: 50
- Notes to Figure 3–11: 51
- Figure 3–12. Receiver Clocks 53
- New TRS reasserts 55
- Stratix IV GX 57
- Note to Table 3–10: 58
- Note to Table 3–11: 58
- Notes to Figure 3–18: 60
- Note to Figure 3–19: 61
- User Logic 62
- Encrypted SDI IP Core 62
- Cyclone IV GX 63
- Notes to Table 3–12: 70
- Note to Table 3–13: 70
- Note to Table 3–14: 71
- Note to Figure 3–30: 77
- Notes to Figure 3–33: 78
- signal in 82
- Table 3–18 on page 3–50 82
- Notes to Figure 3–40: 83
- Notes to Table 3–19: 85
- MegaCore Verification 87
- 4. SDI Audio IP Cores 89
- Functional Description 90
- Note to Table 4–4: 93
- Note to Table 4–5: 94
- MegaCore function 100
- Register Maps 103
- Parameters 105
- AES Format 109
- Avalon-ST Audio Interface 109
- Note to Figure 4–6: 110
- Instantiating the IP Cores 111
- Simulating the Testbench 112
- Design Example 113
- Components 114
- Hardware Setup 116
- D6 D7 D8 D9 D10 D11 D12 D13 118
- A. Constraints 123
- Notes to Figure A–1: 124
- (gxb_rxclk 125
- Specify Clock Characteristics 126
- Set Multicycle Paths 127
- 337.5-MHz Zero-degree Clocks 128
- Minimize Timing Skew 129
- Non Cyclone Devices 130
- Cyclone Devices Only 131
- A–10 Appendix A: Constraints 132
- B. Clocking 133
- B–2 Appendix B: Clocking 134
- C. Receive and Retransmit 135
- Loopback FIFO Buffer 136
- Additional Information 137
- Info–2 Additional Information 138
- Document Revision History 138
- How to Contact Altera 139
- Typographic Conventions 139
- Info–4 Additional Information 140
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