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CMI8738 - Hardware Secrets

CMI8738 . PCI-6CH C3DX series /PCI-Based HRTF 3D Extension Positional audio Chip DESCRIPTION FEATURES. With high speed PCI bus controller and legacy 6CH DAC for AC3 purpose. audio SBPro DSPemulator, CMI8738 is designed for HRTF-based 3D positional audio , supporting PC add-in cards and all-in-one motherboards. No DirectSound 3D interface external CODEC is needed in CMI8738 : CMI-8738 Supports speakers, C3DX positional audio supports the legacy audio SBPRO , FM in 4 / 6 CH speaker mode emulator/DLS wavetable music synthesis, and Legacy audio SBPRO compatible HRTF 3D positional audio functions. Drivers DLS-based wavetable music synthesizer, supports support EAX , Karaoke Key, Echo functions. DirectMusic . Above all CMI8738 supports PCtel HSP56 (1789) Built-in 32ohm Earphone buffer interface.

CMI8738 PCI-6CH C3DX series /PCI-Based HRTF 3D Extension Positional Audio Chip www.cmedia.com.tw Copyright © C-Media Electronics Inc. Rev. 2.2 ︱ Page 4/24

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Transcription of CMI8738 - Hardware Secrets

1 CMI8738 . PCI-6CH C3DX series /PCI-Based HRTF 3D Extension Positional audio Chip DESCRIPTION FEATURES. With high speed PCI bus controller and legacy 6CH DAC for AC3 purpose. audio SBPro DSPemulator, CMI8738 is designed for HRTF-based 3D positional audio , supporting PC add-in cards and all-in-one motherboards. No DirectSound 3D interface external CODEC is needed in CMI8738 : CMI-8738 Supports speakers, C3DX positional audio supports the legacy audio SBPRO , FM in 4 / 6 CH speaker mode emulator/DLS wavetable music synthesis, and Legacy audio SBPRO compatible HRTF 3D positional audio functions. Drivers DLS-based wavetable music synthesizer, supports support EAX , Karaoke Key, Echo functions. DirectMusic . Above all CMI8738 supports PCtel HSP56 (1789) Built-in 32ohm Earphone buffer interface.

2 Drivers support EAX , Karaoke Key, Echo . CMI8738 uses HRTF 3D extension technology to MPU-401 port/ Dual game port enhance traditional HRTF 3D positional audio by 16-bit full duplex CODEC. substituting two-speaker system by four or six - 32-bit PCI bus master speaker one. External E PROM interface Being outstanding for its full audio functions, Single chip design, digital power + , analog competitive price, and power management, power +5V, 128 pins QFP. CMI-8738 is the best choice for people seeking for optimum use of the PC applications. BLOCK DIAGRAM. Copyright C-Media Electronics Inc. Rev. Page 1/24. CMI8738 . PCI-6CH C3DX series /PCI-Based HRTF 3D Extension Positional audio Chip TABLE OF CONTENTS. Revision 3.

3 1. Description and Overview .. 4. 2. Features .. 4. 3. Block Diagram .. 5. 4. Pin Assignment .. 6. 5. Pin Description .. 7. CMI8738 /PCI-6CH C3DX Series Chip Function List .. 7. Digital Pin Description .. 7. 6. Electrical Characteristics .. 9. Absolute Maximum 9. Digital Characteristics .. 9. 7. PCI Configuration Spaces ( audio ) .. 10. 8. PCI register .. 12. Internal Register Mapping .. 12. 9. audio Processing Technology .. 24. Stereo .. 24. Surround (Stereo Expander) .. 24. Multi-Speaker Surround (Dolby Pro Logic or Digital AC-3) .. 24. HRTF 3D Positional 3D (C-Media 3D) .. 25. HRTF 3D Extension Positional (C-Media 3DX) .. 26. C3D Positional audio Technology White-Paper .. 26. a. Use Headphones to Have Much Better 27.

4 B. Choose Correct Output Devices .. 27. c. Position of Speakers .. 28. Turn Surround Sound Functions off .. 28. 10. CMI8738 PCI audio Adapter Layout Notes .. 29. Copyright C-Media Electronics Inc. Rev. Page 2/24. CMI8738 . PCI-6CH C3DX series /PCI-Based HRTF 3D Extension Positional audio Chip Revision History Date Rev. Release Note 2010/05/03 Rev. Format Modification Copyright C-Media Electronics Inc. Rev. Page 3/24. CMI8738 . PCI-6CH C3DX series /PCI-Based HRTF 3D Extension Positional audio Chip 1. Description and Overview With high speed PCI bus controller and legacy audio SBPro DSPemulator, CMI8738 is designed for PC. add-in cards and all-in-one motherboards. No external CODEC is needed in CMI8738 : CMI-8738 supports the legacy audio SBPRO , FM emulator/DLS wavetable music synthesis, and HRTF 3D positional audio functions.

5 Drivers support EAX , Karaoke Key, Echo functions. Above all CMI8738 supports PCtel HSP56 (1789). interface. Being compatible with DirectSound 3D, CMI8738 meets PC99 requirements, and supports professional digital audio interface such as 16-bit SPDIF IN ( ~ 5V)and OUT( and 48K format). CMI8738 uses HRTF 3D extension technology to enhance traditional HRTF 3D positional audio by substituting two-speaker system by four or six - speaker one (it supports additional 2 ch 16-bit DAC to provide rear side audio and another 2 ch for subwoofer/Center). It greatly improves HRTF 3D positional audio quality and successfully removes the sweet spot limitations: users can enjoy genuine 3D audio gaming effects, and don't have to worry about the environmental confinement any more.

6 Being outstanding for its full audio functions, competitive price, and power management, CMI-8738 is the best choice for people seeking for optimum use of the PC applications. 2. Features 6CH DAC for AC3 purpose. HRTF-based 3D positional audio , supporting DirectSound 3D interface Supports speakers, C3DX positional audio in 4 / 6 CH speaker mode Legacy audio SBPRO compatible DLS-based wavetable music synthesizer, supports DirectMusic . Professional digital audio interface supporting 24-bit SPDIF IN and OUT ( and 48K format). Built-in 32ohm Earphone buffer Drivers support EAX , Karaoke Key, Echo . MPU-401 port/ Dual game port 16-bit full duplex CODEC. Built-in ZV port 32-bit PCI bus master External E PROM interface Single chip design, digital power + , analog power +5V, 128 pins QFP.

7 Copyright C-Media Electronics Inc. Rev. Page 4/24. CMI8738 . PCI-6CH C3DX series /PCI-Based HRTF 3D Extension Positional audio Chip 3. Block Diagram Copyright C-Media Electronics Inc. Rev. Page 5/24. CMI8738 . PCI-6CH C3DX series /PCI-Based HRTF 3D Extension Positional audio Chip 4. Pin Assignment QFP 128 PINS. 10 2. 10 1. 10 0. 99. 98. 97. 96. 95. 94. 93. 92. 91. 90. 89. 88. 87. 86. 85. 84. 83. 82. 81. 80. 79. 78. 77. 76. 75. 74. 73. 72. 71. 70. 69. 68. 67. 66. 65. U1. X AUX L. X TX D. X AUX R. X MBCS Z. X PCS PK IN. X EE CS. X RX D. X ADOUTB. X SP DIFO. X GP B IO. X LNL. X RE A RL. X ADOUTC. X ADOUTR. X MICIN. X LNR. X RE A RR. X CDG. X GD7. X GD6. X GD5. X GD4. X GD3. X GD2. X GD1. X GD0. X CDL. X RING. X ADCHL.

8 V DDM. A VDD. X CDR. X ADCHR. X SP DIFI/ZV S DI. V DD5V. A GND. X OFFHOOK. DGND. 10 3 64. 10 4 X AFERS T X ADOUT L 63. 10 5 X SCLK NC 62. 10 6 X HS P FS X INT VRE F 61. 10 7 X HS P SDI A VDD 60. 10 8 X HS P SDO A GND 59. 10 9 X AFEMCLK E XT B AS S 58. 11 0 X BIO3 X MOUT 57. 11 1 X BIO2 X MIN 56. 11 2 X BIO1 X OUT 55. 11 3 X ZV CL K X IN 54. 11 4 X SP DIFI2 /ZVL RCK V core 53. 11 5 X MDS EL GND 52. 11 6 V core X A0 51. 11 7 GND X A1 50. 11 8 X INT A X A2 49. 11 9 X INT B X A3 48. 12 0 X PRS T X A4 47. 12 1 X CL K3 3 X A5 46. 12 2 X GNT GND 45. 12 3 X RE Q V DD 44. 12 4 X PME X A6 43. 12 5 V DD X A7 42. 12 6 GND X CB E 0 41. 12 7 X A3 1 X A8 40. 12 8 X A3 0 X A9 39. X A2 9 X A1 0. X DE V SE L. X FRAME. X IDS EL. X CB E 3.

9 X CB E 2. X CB E 1. X STOP. X TRDY. X IRDY. X PA R. X A2 8. X A2 7. X A2 6. X A2 5. X A2 4. X A2 3. X A2 2. X A2 1. X A2 0. X A1 9. X A1 8. X A1 6. X A1 5. X A1 4. X A1 3. X A1 2. X A1 1. GND. V DD. V DD. GND. GND. V DD. V DD. GND. GND. V DD. A 17. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 1. 2. 3. 4. 5. 6. 7. 8. 9. CMI87 38. CMI8738 /PCI-6CH C3DX audio CHIP. Copyright C-Media Electronics Inc. Rev. Page 6/24. CMI8738 . PCI-6CH C3DX series /PCI-Based HRTF 3D Extension Positional audio Chip 5. Pin Description CMI8738 /PCI-6CH C3DX Series Chip Function List Model SPDIF/ZVport CMI8738 /PCI-6CH YES. CMI8738 /PCI-6CH-MX YES. CMI8738 /PCI-6CH-LX NO. Digital Pin Description Name Number PIN Type Definition 126-128,1-2,5-7,12-16,19-21,3.

10 XA31-XA0 I/O PCI bus address and data lines 2-35,38-41,43-44,47-52. XINTA 117 O Interrupt request , active-low. Independent Modem interrupt request XINTB 118 O. (optional; unused). XPRST 119 I Reset XCLK33 120 I PCI bus clock. XGNT 121 I Bus master grant, active-low. Bus master request, tri-state output, XREQ 122 O. active-low. XPME 123 O Power Management Event pin (optional;. unused). XIDSEL 9 I ID select, active-high. XFRAME 23 I/O Cycle frame, active-low. Initiator ready, active-low. The bus master XIRDY 24 I/O. device is ready to transmit or receive data Target ready, active-low. The target device is XTRDY 25 I/O. ready to transmit or receive data Device select, active-low. The target device XDEVSEL 26 I/O has decoded the address of the current transaction as its own chip select range.


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