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PDF CMI9761 Data sheet ( Hoja de datos )
| Número de pieza | CMI9761 | |
| Descripción | 6CH AC97 2.3 CODEC | |
| Fabricantes | C-Media Electronics | |
| Logotipo |  |
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6CH AC’97 2.3 CODEC
CMI 9761 Datasheet Rev. 1.0
Contents
0. Revision History ....................................................................................................3
1. Features ..................................................................................................................4
2. Overview................................................................................................................6
3. Pin Assignment ......................................................................................................7
4. Pin / Signal Descriptions........................................................................................8
4.1 Power / Ground ..........................................................................................8
4.2 AC-Link / Clocking ...................................................................................8
4.3 Digital I/O ..................................................................................................9
4.4 Analog I/O .................................................................................................9
4.5 Filter / Reference......................................................................................10
4.6 Configuration ...........................................................................................10
5. Jack Detection and Configuration Information.................................................... 11
5.1 Resistors Network Method ...................................................................... 11
5.2 Configuration Diagram ............................................................................12
6. DC Characteristics ...............................................................................................13
7. AC-Link Timing Characteristics..........................................................................14
7.1 Cold Reset Timing ...................................................................................14
7.2 Warm Reset Timing .................................................................................14
7.3 AC-Link Clocks .......................................................................................15
7.4 Data Output and Input Timing .................................................................16
7.5 Signal Rise and Fall Timing.....................................................................17
7.6 AC-Link Low Power Mode Timing.........................................................18
7.7 ATE Test Mode ........................................................................................18
8. Analog Performance Characteristics....................................................................19
9. Package Dimension..............................................................................................20
Copyright 2003-2004 © C-Media Electronics Inc.
Page 1
1 page  
6CH AC’97 2.3 CODEC
CMI 9761 Datasheet Rev. 1.0
Valuable software technology:
Support Dolby Digital 5.1 RTCE (Real-Time Content Encoder)
output for Dolby-certified MB/Media Center applications
(optional)
Xear 3D sound technology: 5.1 Virtual SPEAKER SHIFTER
and Earphone Plus listening mode (earphone in place of rear
speakers)
Sensaura® CRL3D HRTF 3D positional sound and enhancement
Support Creative EAX 1.0/2.0, Microsoft® DirectSound 3D
(DirectX) H/W&S/W, & A3D 1.0 for realistic PC game playing
Karaoke functionality includes unique Microphone Echo, Key
Shifting, and Vocal Cancellation features
10-Band Equalizer with 12 pre-set modes
27 listening environment effects plus 3 environmental sizes
emulation
Dynamic Auto-Gain-Control technology preventing the
volume saturation distortion of playback and recording
Provide Microsoft WHQL certified drivers compatible with Intel®,
SiS®, VIA®, ALi®, and nVidia® SB AC’97 audio controllers
Copyright 2003-2004 © C-Media Electronics Inc.
Page 5
5 Page 
6CH AC’97 2.3 CODEC
CMI 9761 Datasheet Rev. 1.0
5. Jack Detection and Configuration Information
In this section, we describe the resistors network method for jack
detection and configuration identification. And also, due to the design
of CMI9761 with shared audio function and dedicated multi-channel
output, the configuration of audio system can be as versatile as
possible.
5.1 Resistors Network Method
+5VA
1K
To Sense Pin
1K
J1
BA
J2
2K
J3
4K
J4
8K 16K/open
C
A. The switch will be closed if audio connector is plugged in.
B. The switch will be open if audio connector is plugged out.
C. The configuration is identified via a weighting resistor or open.
Figure 2. Resistors Network Method for Jack Detection
The sense pin connects to an ADC internally to measure the resistance
of the network. CMI9761 is able to monitor the plugging status of
each jack according to the resistance measured. To obtain a correct
result, the value of each precision resistor should not be modified
from the specified schematics provided by C-Media for any reason.
Copyright 2003-2004 © C-Media Electronics Inc.
Page 11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet CMI9761.PDF ] | |
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