CMI 9739
Integrated Multi-channel AC'97
CMI9739/CMI9739A Six Channel Audio Codec Preliminary
Specifications
Description and Overview
Features
Intel
AC'97(Rev 2.2) compatible, meeting
Microsoft's
PC2001 requirements
Built-in earphone buffer and internal PLL,
the latter saving additional crystal.
Earphone buffer, optional on HP_OUT
pins(9739) or LINE_HP_OUT pins(9739A).
Line-in/rear out share the same jack.
Center/bass share the MIC jack.
Digital S/PDIF IN/OUT support
48 LQFP package.
CRL
3D: HRTF based DS3D compatible
audio engine.
EAX
1.0 & 2.0 compatible.
Sensaura
3D audio enhancement
(optional).
18-20bit DAC interface for SPDIF
I/O(ICH4).
Universality
CMI9739 is a 6CH AC97 CODEC, applicable
for major MB chipsets of Intel, VIA, Ali, and
SIS. CMI9739 is ideal for PC2001-compliant
desktops, notebooks, and home entertainment
PCs where high-quality audio is a must.
6CH Playback
The specially-designed 6CH hardware
architecture of CMI9739 allows multi-channel
south bridge to playback 6CH audio.
Cost-effectiveness
As to the cost concern, CMI9739 integrates the
earphone buffer, analog CD differential
interface, and analog switch for rear channel
audio to Line-in. Besides, Mic-in can share
same jack with center/bass output for
traditional 3 jacks audio port to output 6
channels audio. CMI9739 also has built-in
PLL
to save additional crystal.
More Audio Option
Last but not least, CMI9739 provides HRTF 3D
audio which interface compatible with EAX
/
A3D
/DirectSound3D. In addition, it provides
Sensaura
3D audio option. In that regard,
the audio quality of CMI9739 is fabulous
beyond general expectation.
Revision Date: May 2002
Version: 1.3
1
CMI 9739
Integrated Multi-channel AC'97
PIN DESCRIPTIONS
CMI9739
PIN #
Signal Name
PIN #
Signal Name
1 DVdd1 25 AVdd1
2 XTL_IN 26 AVss1
3 XTL_OUT 27 Vref
4 DVss1 28 Vrefout
5 SDATA_OUT 29 XTALS0
6 BIT_CLK 30 XTALS1
7 DVss2 31
HP_OUT_L
8 SDATA_IN 32
HP_OUT_R
9 DVdd2 33 NC
10 SYNC 34 NC
11 RESET# 35
LINE_OUT_L
12 PC_BEEP 36
LINE_OUT_R
13 NC 37 NC
14 AUX_L 38 AVdd2
15 AUX_R 39 S_OUT_L
16 NC 40 NC
17 NC 41
S_OUT_R
18 CD_L 42 AVss2
19 CD_GND 43
CENTER_OUT
20 CD_R 44
LFE_OUT
21 MIC1 45
HP_ON/GPIO0
22 MIC2 46
XTLSEL/GPIO1
23 LINE_IN_L 47
EAPD/SPDIF
IN
24 LINE_IN_R 48 SPDIFO
CMI9739-6CH
Revision Date: May 2002
Version: 1.3
2
CMI 9739
Integrated Multi-channel AC'97
CMI9739A
PIN #
Signal Name
PIN #
Signal Name
1 DVdd1 25 AVdd1
2 XTL_IN 26 AVss1
3 XTL_OUT 27 Vref
4 DVss1 28 Vrefout
5 SDATA_OUT 29 XTALS0
6 BIT_CLK 30 XTALS1
7 DVss2 31
LINE_OUT_L
8 SDATA_IN 32
LINE_OUT_R
9 DVdd2 33 NC
10 SYNC 34 NC
11 RESET# 35
LINE_HP_OUT_L
12 PC_BEEP 36
LINE_HP_OUT_R
13 NC 37 NC
14 AUX_L 38 AVdd2
15 AUX_R 39 S_OUT_L
16 NC 40 NC
17 NC 41
S_OUT_R
18 CD_L 42 AVss2
19 CD_GND 43
CENTER_OUT
20 CD_R 44
LFE_OUT
21 MIC1 45
HP_ON/GPIO0
22 MIC2 46
XTLSEL/GPIO1
23 LINE_IN_L 47
EAPD/SPDIF
IN
24 LINE_IN_R 48 SPDIFO
CMI9739A-6CH
Revision Date: May 2002
Version: 1.3
3
CMI 9739
Integrated Multi-channel AC'97
CMI9739 mixer is designed according to the AC'97 specifications, capable of managing the
playback and recording of all digital and analog audio sources in PC environment.
It includes:
System audio: digital PCM input and output for business, gaming, and multimedia applications
.
CD/DVDanalog CD/DVD-ROM Redbook audio with internal connections to Codec mixer
Mono microphoneDesktop or headset mic with
programmable boost and gain
SpeakerphoneSystem mic & speakers for telephony, DSVD, and video conferencing.
Stereo line inAnalog
external line level source from consumer audio, video cameras, etc
AUX/synthAnalog FM or wavetable synthesizer, or other internal sources.
SOURCE FUNCTION
CONNECTION
PC_BEEP
PC beep pass through
from PC beeper output
MIC1
desktop microphone
from mic jack
MIC2
headset microphone
from headset mic jack
LINE_IN
external audio source
from line in jack
CD
audio from CD-ROM drive
cable from CD-ROM
AUX
upgrade synth or other external sources
internal connector
PCM out
digital audio output from AC '97 Controller
AC-link
Mix out
mix of all sources
AC `97 internal
Center_OUT Center
out channel
to output jack
LFE_OUT
Low frequency effect out channel
to output jack
LINE_OUT
stereo mix of all sources (front channel)
to output jack
REAR_OUT
stereo output of rear (surround) channel
to output jack
HP_OUT
stereo output with earphone buffer (NC for 9739A)
to output jack
PCM in
digital audio input to AC '97 Controller
AC-link
OUTPUT MIX SUPPORT:
INPUT MUX SUPPORT:
stereo mix of all sources for LINE_OUT
any mono or stereo source
stereo output for REAR_OUT
mono or stereo mix of all sources
Revision Date: May 2002
Version: 1.3
4
CMI 9739
Integrated Multi-channel AC'97
2. ORDERING INFORMATION
Model Number
Package
Temperature Range
Supply Range
CMI9739
48-Pin LQFP 9mm7mm1.6mm
0 o C to +70 o C
DVdd = 3.3V, AVdd = 5V
CMI9739A
48-Pin LQFP 9mm7mm1.6mm
0 o C to +70 o C
DVdd = 3.3V, AVdd = 5V
Outline of Dimensions Dimensions shown in inches and (mm
48-Lead Thin Plastic Quad Flatpack (LQFP) (ST-48)
*C-Media reserves the right to
modify the specifications without further
notice.
Revision Date: May 2002
Version: 1.3
5
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