CMI8768 - N/A - Datasheet.Directory

CMI 8768

PCI 8CH Integrated Sound Chip

Enhanced by Xear 3D

TM

Sound Technology

Data Sheet

Rev. 0.9

Mar. 31, 2004

NOTICES

THIS DOCUMENT IS PROVIDED “AS IS” WITH NO WARRANTIES

WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY,

NONINFRINGEMENT, FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY

WARRANTY OTHERWISE ARISING OUT OF ANY PROPOSAL, DOCUMENT OR

SAMPLE.

REPRODUCED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS,

ELECTRONIC OR MECHANICAL, INCLUDING INFORMATION STORAGE AND

RETRIEVAL SYSTEMS, WITHOUT PERMISSION IN WRITING FROM THE

C-MEDIA ELECTRONICS, INC.

Third-party brands and names are the property of their respective owners.

C-Media Electronics, Inc.

6F, 100, Sec. 4, Civil Boulevard, Taipei, Taiwan 106, R.O.C.

TEL: 886-2-8773-1100 FAX: 886-2-8773-2211

http://www.cmedia.com.tw

For detailed product information, please contact sales@cmedia.com.tw

PCI 8CH Integrated Sound Chip

CMI8768 Datasheet Rev 0.9

1

Contents

0. Revision History............................................................................................................... 3

1. Features........................................................................................................................... 4

2. Overview......................................................................................................................... 5

3. Block Diagram................................................................................................................7

4. Pin Assignment ...............................................................................................................8

5. Pin Description ................................................................................................................ 9

5.1 Digital I/O ....................................................................................................................... 9

5.2 Analog I/O ................................................................................................................... 10

5.3 Power & Ground ......................................................................................................... 10

5.4 NC …………………………………………………………………………………………..10

6. Electrical Characteristics............................................................................................. 11

6.1 Maximum Ratings ....................................................................................................... 11

6.2 Recommended Operating Conditions................................................................... 11

6.3 Power Consumption................................................................................................... 11

6.4 Digital Characteristics ................................................................................................ 11

6.5 AC Characteristics ..................................................................................................... 12

6.6 Analog Performance ................................................................................................. 13

7. Mechanical Dimensions .............................................................................................. 15

PCI 8CH Integrated Sound Chip

CMI8768 Datasheet Rev 0.9

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List of Figures

Figure 1. Graphic User Interface Samples-- Main Setting & Mixer ............................... 5

Figure 2. Graphic User Interface Samples—Virtual Speaker SHIFTER & Sound Effect.. 6

Figure 3. Graphic User Interface Samples—Karaoke & Magic Voice & Information.. 6

Figure 4. Block Diagram ................................................................................................... 7

Figure 5. Top View of CMI8768......................................................................................... 8

Figure 6. Mechanical Dimension................................................................................... 15

PCI 8CH Integrated Sound Chip

CMI8768 Datasheet Rev 0.9

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0. Revision History

Date Rev. Release Note

2003/06/13 Rev. 0.1 - Preliminary vision

2003/07/17 Rev. 0.2 - Change feature and pin description

2003/10/13 Rev. 0.3 - Add analog performance data

2004/03/31 Rev. 0.9 - Change product name from 8768+ to 8768

- Update feature/overview description (Support

96K/24Bit output)

- Clarify block diagram (no legacy/SBPRO support)

- Correct pin function (#125 XS6CH=>GND;

#90-97 XGD0-XGD7=>NC)

- Add Electrical Characteristics data and update

analog performance

PCI 8CH Integrated Sound Chip

CMI8768 Datasheet Rev 0.9

4

1. Features

 The global first 8CH single sound chip with embedded codec saving customer

total BOM cost

 Full-duplex 8CH DAC/2CH ADC

 Supports 96K/24bit playback; 48K/16bit recording

 CE level high-quality Signal-to-Noise Ratio (SNR)~ 100dB

 Integrated S/PDIF transmitter supports 44.1k/48k/96KHz sample-rate and

16/24bits resolution

 PCI Rev. 2.2 compliant with bus mastering modes

 Supports the latest Dolby® Digital EX and DTS® ES 6.1/7.1CH DVD

soundtrack playback

 Two S/PDIF inputs for optical and coaxial connectors individually

 Built-in earphone buffer at Front-Out pins (32Ω loading)

 One GPIO (General purpose I/O) support

 External EEPROM Interface for SID R/W purpose

 Supports MPU401 MIDI UART port

 DirectSound™ 3 HW acceleration

 ACPI compliant power down management

 Zoomed Video Port support

 Industrial standard 128-lead QFP package

 Pin-to-Pin compatible with CMI8738 series

 Digital power = 3.3V & 5V, Analog power = 5V

Valuable S/W:

 C-Media Xear 3D™ 7.1 Virtual Speaker SHIFTER technology

 Sensaura® CRL3D HRTF 3D positional sound enhancement with multi-drive

7.1, EnvironmentFX, ZoomFX, MacroFX, etc.

 Supports most industrial standards of PC 3D sound for gaming, including EAX™

1.0&2.0, A3D™ 1.0, and DirectSound™ 3 SW

 Unique Karaoke functionality: Mic Echo, Key-shifting, Vocal Cancellation

 Interesting Magic VoiceTM feature to change users’ voice tone for IP phone,

online games, and messenger applications

 10-band Equalizer with 12 preset modes; 27 global environment effects

 Support 7.1 CH digital audio playback for WinXP, 2K, ME, 98SE (Microsoft

DirectX V.8.1 above is required)

 Other oncoming features (ASIO driver, NR/AEC,…)

PCI 8CH Integrated Sound Chip

CMI8768 Datasheet Rev 0.9

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2. Overview

CMI8768 is the first high performance (SNR~100dB) 8CH PCI integrated sound chip

compatible with PCI V.2.2 specification in the world. With 24bit/96K digital/analog

playback capability and versatile driver support, CMI8768 is designed delicately for

advanced consumer PC sound card/media center/mainboard/desktop/server audio

applications. Through integrating a full-duplex 8/2 CODEC and S/PDIF

transmitter/receiver, CMI8768 consequently saves much BOM cost for customers.

CMI8768, bundled with C-Media friendly and high add-on value driver, provides the

most economic and ideal audio solution with the best value-price ratio.

Integrated S/PDIF transmitter can deliver 24bit/96K high-definition 5.1 Dolby®

Digital/DTS®, or 6.1/7.1 Dolby® Digital Surround EX/DTS ES DVD soundtracks and

audio stream to external receiver satisfying audio enthusiasts and pioneers. The

S/PDIF-Out data can meet the requirement of SCMS (Serial Copy Management

System) for digital content serial copy protection legislated by consumer audio

industry. CMI8768 also supports MPU-401 MIDI port for external musical instrument

input.

Figure 1. Graphic User Interface Samples-- Main Setting & Mixer

Being compatible with various industrial standards for gaming such as

EAX™ 1.0&2.0, A3D™ 1.0, Direct Sound™ 3D powered by Sensaura® CRL3D HRTF

3D engine, C-Media CMI8768 can provide enthusiastic gamers breathtaking sound

experience in gaming.

C-Media proprietary Xear 3DTM sound technology empowers users to shift virtual

speakers anywhere they want for optimizing the personal sound field. Virtual

speakers can even deliver up-to-7.1 channel surround sounds over only 2 physical

speakers or headphones. C-Media unique Magic VoiceTM functionality can reform your

microphone voice through the recording process delivering amazing disguise effects

PCI 8CH Integrated Sound Chip

CMI8768 Datasheet Rev 0.9

6

for fun in many applications, such as Internet phone, messenger, online games, etc.

Microphone echo and key-shifting features are well designed for karaoke application.

Other sound effects like 10-band Equalizer and 27 environment effects can enrich

users audio experience and enjoyment.

Figure 2. Graphic User Interface Samples—Virtual Speaker SHIFTER & Sound

Effect

Figure 3. Graphic User Interface Samples—Karaoke & Magic Voice & Information

PCI 8CH Integrated Sound Chip

CMI8768 Datasheet Rev 0.9

7

3. Block Diagram

CMI 8768

8CH Analog Outputs

PCI

Interface

MPU-401

Port

DMA Engine

& IRQ

S/PDIF I/O

ZV Port

8CH DAC

2CH ADC

Analog

Mixer

PCI Local Bus

Digital I/O

Microphone/PCBeep

Line/CD/Aux Inputs

PLL

(14.318MHz)

Audio

DSP Engine

HP AMP

Figure 4. Block Diagram

PCI 8CH Integrated Sound Chip

CMI8768 Datasheet Rev 0.9

8

4. Pin Assignment

Figure 5. Top View of CMI8768

PCI 8CH Integrated Sound Chip

CMI8768 Datasheet Rev 0.9

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5. Pin Description

5.1 Digital I/O

Pin No Signal Name Type Description

1-2,

5-7,

12-16,

19-21,

32-35,

38-41,

43-44,

47-52,

126-128

XA31 – XA0

I/O PCI bus address and data lines

117 XINTA O Interrupt request, active-low

119 XPRST I Reset

120 XCLK33 I PCI bus clock

121 XGNT I Bus master grant, active-low.

122 XREQ O Bus master request, tri-state output, active-low.

9 XIDSEL I ID select, active-high.

23 XFRAME I/O Cycle frame, active-low.

24 XIRDY I/O Initiator ready, active-low. The bus master

device is ready to transmit or receive data.

25 XTRDY

I/O Target ready, active-low. The target device is

ready to transmit or receive data.

26 XDEVSEL I/O

Device select, active-low. The target device has

decoded the address of the current transaction

as its own chip select range.

29 XSTOP I/O

Stop transaction, active-low. The target device

request to the master to stop the current

transaction.

30 XPAR I/O

Parity. The pin indicates even parity across

XA31-XA9 and XCBE3-XCBE0 for both address

and data phases.

8, 22,

31, 42

XCBE0 –

XCBE3 I/O

Multiplexed command / byte enable. These pins

indicate cycle type during the address phase of a

transaction.

88 XTXD O MIDI transmit data

89 XRXD I MIDI receive data

55 XIN I 14.318 MHz crystal input or ext. oscillator input

56 XOUT O 13.318 MHz crystal output or NC

87 XGBIO0 I/O General purpose I/O

84 XEECS O EEPROM chip select

85 XMBCSZ I Audio chip enable select (low:enable)

112 ZVCLK I ZV port clock

98 XSPDIFO O S/PDIF output

86 XSPDIFI I

S/PDIF input 1 /

ZV port LR channel clock

113 XSPDIFI2 I

S/PDIF input 2 (TTL 5V) /

ZV port data input

PCI 8CH Integrated Sound Chip

CMI8768 Datasheet Rev 0.9

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5.2 Analog I/O

Pin No Signal Name Type Description

57,58 XSUROUTL-R O Back surround out L/R channel

59 EXTBAS O External bass input

64,65 XADOUTL-R O Front out L/R channel

66,67 XADCFL-R O ADC S/H capacitors

68 XCNOUT O Center channel output

69 XBSOUT O Bass channel output

70 XCDGND O

CD audio differential ground

channel output

71,72 XCDL-R O CD audio differential L/R channel output

73,74 XREARL-R O Side surround out L/R channel

75,76 XLNL-R I Line-In L/R channel

77,78 XAUXL-R I Aux input L/R channel

79 XPCSPKIN I PC beep or mono input

80 XMIC I Microphone input

5.3 Power & Ground

Pin No Signal Name Type Description

4, 10,

18, 27,

37, 45,

100,

124

VDDIO I PCI I/O power pin

54, 115 VDDCORE I Core logic power pin

83 VDD5V I PCI I/O power pin

3, 11,

17, 28,

36, 46,

53, 82,

99, 116,

125

GND I Digital ground

61, 81 AVDD I Analog I/O power pin

60, 82 AGND I Analog ground

5.4 NC

Pin No Signal Name

63, 90-97, 101 – 111, 114, 118,

123 NC

PCI 8CH Integrated Sound Chip

CMI8768 Datasheet Rev 0.9

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6. Electrical Characteristics

6.1 Maximum Ratings

Parameter Symbol Min. Max. Unit

Digital power voltage DVDD 3 3.6 V

Analog power voltage AVDD 3 5.5 V

Digital Input Voltage VIND -0.5 3.6 V

Analog Input Voltage VINA -0.5 5.5 V

Operating temperature range TO 0 70 °C

Storage temperature range TST -40 125 °C

Maximum power dissipation PDMAX 300 MW

6.2 Recommended Operating Conditions

Parameter Symbol Min. Typ. Max. Unit

Digital Operating Voltage DVDD 3.135 3.3 3.465 V

Analog Operating voltage AVDD 4.75 5 5.25 V

Operating Ambient Temperature TO 0 25 70 °C

6.3 Power Consumption

Parameter Min. Typ. Max. Unit

Power Supply Current (Normal)

AVDD (5.0V)

DVDD (3.3V)

-

35

10

-

mA

6.4 Digital Characteristics

PARAMETER Symbol Condition Min. Typ. Max. Unit

Input high voltage(PCI I/O)

VIH 2.0 - VDD+0.3 V

Input low voltage (PCI I/O)

VIL -0.5 - 0.8 V

Output high voltage

VOH I

OH

=1.5mA 2.4 - VDD V

Output low voltage

VOL I

OL

=-0.5mA 0.0 0.2 0.4 V

Input Leakage Current

IIL 0<Vin<VDD -70 - 70 μA

Output Leakage Current

IOL -70 - 70

μA

SPDIF IN input high voltage

VIH1 2.6 - - V

SPDIF IN input low voltage

VIL1 - - 2.4 V

SPDIF output high voltage

VOH1 - VDD - V

SPDIF output low voltage

VOL1 - GND - V

PCI 8CH Integrated Sound Chip

CMI8768 Datasheet Rev 0.9

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Input Pin Capacitance

Cin - - 10 pF

Pin Inductance

Lpin - - 20 nH

6.5 AC Characteristics

Parameter Symbol Condition Min. Max. Units

High Clamp

Current

Ich Vdd+4>Vin>=Vdd+1 25+(Vin-Vdd-1)/0.015 - mA

Low Clamp

Current

Icl -3<Vin<=-1 -25+(Vin+1)/0.015 - mA

Output Rise

Slew Rate

SLEWr 0.2Vdd-0.6Vdd load 1 4 V/ns

Output Fall

Slew Rate

SLEWf 0.6Vdd-0.2Vdd load 1 4 V/ns

PCI 8CH Integrated Sound Chip

CMI8768 Datasheet Rev 0.9

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6.6 Analog Performance

The measurements are performed under the circumstance as:

T

ambient

= 25 , AVdd = 5.0V ± 5%, DVdd = 3.3V ± 5%, 10kΩ/50pF external load.℃ Input is 1

kHz sine wave; Sampling frequency = 48 kHz; Bandwidth = 20 to 20 kHz; 0dB attenuation;

All sound effects such as 3D effects are disabled.

Parameter Minimum Typical Maximum Units

Full Scale Input Voltage:

Line Inputs (Mixer)

Line Inputs (A/D)

Mic Inputs (20dB boost)

-

1.1

-

0.1

1.25

Vrms

Full Scale Output Voltage:

Front_Out

Side_Surround_Out

Center / LFE_out

Back_Surround_Out

-

1.1

-

Vrms

SNR (Idle)

A/A

D/A

A/D

-

100

101

86

-

dB

Dynamic Range (-60dB)

A/A

D/A

A/D

-

100

94

85

-

dB

THD+N

A/A

D/A

A/D

-

0.005

0.017

0.015

-

%

Frequency Response

A/A

D/A

A/D

5

10

-

22,000

Hz

Cross-talk @ 10KHz (A/A) - 100 - dB

Transition Band 19,200 28,800 Hz

Stop Band 28,800 ∞ Hz

Stop Band Rejection - -70 - dB

Out-Of-Band Rejection - -65 - dB

Power Supply Rejection Ratio - -65 - dB

Master Volume Gain (32 steps)

Step Size

Control Range

-54

1.5

-

+6

dB

Analog Input Gain (16 steps)

Step Size

Control Range

-30

2

-

0

dB

Mic Input Gain (16 steps)

Step Size

Control Range

-22

3

-

+24

dB

Mic Boost Gain - +20 - dB

PCSPK Input Gain (4 steps)

Step Size

Control Range

-24

8

-

0

dB

Recording Gain (16 steps)

Step Size

Control Range

0

1.5

-

+22.5

dB

Input Impedance

PCI 8CH Integrated Sound Chip

CMI8768 Datasheet Rev 0.9

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Parameter Minimum Typical Maximum Units

Line-In, CD, Aux, PCSPK

Mic (w/o Boost)

Mic (w/ Boost)

-

60

30

10

-

KΩ

Output Impedance

Amplifier Output

Non-amp Output

-

2

200

-

Ω

Output Power

Line-Out (Front) @32Ω Load

Line-Out (Front) @10KΩ Load

-

50

0.16

-

mW

Vrefout - 2.25 -

V

PCI 8CH Integrated Sound Chip

CMI8768 Datasheet Rev 0.9

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7. Mechanical Dimensions

Figure 6. Mechanical Dimension

Symbols Min. Typ. Max. Notes

A1 0.25 0.35 0.45

A2 2.57 2.72 2.87

b 0.10 0.20 0.30

C 0.10 0.15 0.20

D 13.90 14.00 14.10

E 19.90 20.00 20.10

e - 0.50 -

Hd 17.00 17.20 17.40

He 23.00 23.20 23.40

L 0.65 0.80 0.95

L1 - 1.60 -

Y - - 0.08

θº 0 - 12

1. Jedec outline：N/A

2. Datum plane H is located at the

bottom of the mold parting line

coincident with where the lead exits

the body.

3. Dimensions E and D do not include

mold protrusion. Allowable protrusion

is 0.25 mm per side. Dimensions E and

D do include mold mismatch and are

determined at datum plane H.

4. Dimension b does not include dambar

protrusion.

Unit：mm

~The End of Datasheet~