Two-Channel, 20-Bit, AC'97 Codecs with Microphone Jack Sensing DESCRIP

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Two-Channel, 20-Bit, AC'97 Codecs with Microphone Jack Sensing DESCRIP

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STAC9752/53
Two-Channel, 20-Bit, AC'97 Codecs with Microphone Jack Sensing DESCRIPTION
SigmaTel's STAC9752/53 general purpose 20-bit, full duplex, audio codecs conforming analog component specification AC'97 (Audio Codec Component Specification Rev. 2.3). STAC9752/53 incorporates SigmaTel's proprietary technology AC'97 codec designed achieve excess 90dB. DACs, ADCs, mixer integrated with analog I/Os, which include four analog line-level stereo inputs, analog line-level mono inputs, stereo outputs, mono output channel. STAC9752/53 includes digital input/output capability support modern systems with output that supports SPDIF format. STAC9752/53 standard 2-channel stereo codec. With SigmaTel's headphone drive capability, headphones driven with without external amplifier. STAC9752/53 used secondary codec, with STAC9700/21/56/08/84/50/66 primary, multiple codec configuration conforming AC'97 Rev. specification. This configuration provide true six-channel, AC-3 playback required applications. STAC9752/53 communicates five-wire ACLink digital component AC'97 providing flexibility audio system design. Packaged AC'97 compliant 48-pin TQFP, STAC9752/ placed motherboard, daughter boards, PCI, AMR, CNR, cards. STAC9752/53 provides variable sample rate Digital-to-Analog (DA) Analog-to-Digital (AD) conversion, mixing, analog processing.
FEATURES High performance technology AC'97 Complaint 20-bit full duplex stereo DACs Independent sample rates DACs 5-Wire AC-Link protocol compliance 20-Bit SPDIF Output Internal Jack Sensing Headphone
Line_Out
Internal Microphone Input Sensing Digital Beep Option Extended AC'97 Paging Registers Digital-ready status General purpose Crystal Elimination Circuit Headphone drive capability (50mW) 10db, 20db, microphone boost capability analog power supply options
+3.3V (STAC9753) (STAC9752) compatible with STAC9700/21/56 100% compatible with STAC9750/66 SigmaTel Surround (SS3D) Stereo
Enhancement
Energy saving dynamic power modes Multi-Codec option (Intel AC'97 2.3) analog line-level inputs 90dB LINE-LINE through Mixer
ORDERING INFORMATION
Part Number STAC9752T STAC9753T Package 48-pin TQFP 1.4mm 48-pin TQFP 1.4mm Temp Range +70° +70° Supply Range DVdd 3.3V, AVdd 5.0V DVdd 3.3V, AVdd 3.3V
2-9752-P1-1.0-0402
STAC9752/53
Two-Channel, 20-Bit, AC'97 Codecs with Microphone Jack Sensing DESCRIPTION (CONTINUED)
Supported audio sample rates include kHz, 44.1 kHz, kHz, 22.05 kHz, kHz, 11.025 kHz, kHz; additional rates supported STAC9752/53 soft audio drivers. ADC's DAC's operate 20-bit resolution. 20-Bit DACs convert digital stereo PCM-out content audio. MIXER block combines PCM_OUT with analog sources, drive LINE_OUT HP_OUT outputs. MONO_OUT delivers either only, mono sources from MIXER. stereo variable sample rate 20-Bit ADC's provide record capability mono stereo sources, deliver digital stereo PCM-in signal back AC-Link. microphone input mono input recorded simultaneously, thus allowing digital output support digital ready initiative. digital ready record path, microphone connected left channel while mono output stereo mixer connected right channel ADC. STAC9752/53 includes jack sensing Headphone Line_Out. STAC9752/53 jack sense detect presence devices Headphone Line Outputs both inputs. With proprietary SigmaTel current impedance-sensing techniques, impedance load Headphone Line Outputs also detected. GPIOs STAC9752/53 remain available advanced configurations unlike previous jack sense implementations. STAC9752/53 implementation jack sense uses Extended Paging Registers defined AC'97 Specification. This allows additional registry space hold identification information about codec, jack sensing details results, external surroundings codec. information within Extended Paging Registers will allow automatic configuration audio subsystem without end-user intervention. example, BIOS populate Extended Paging Registers with valuable information both audio driver operating system such gain attenuation stages, input population input phase. With this input information, SigmaTel driver will automatically provide Volume Control Panel only volume sliders that implemented system, thus improving end-user's experience with information Extended Paging Registers will also allow automatic configuration microphone inputs, ability switch between SPDIF analog outputs, routing master volume slider proper physical output, SoftEQ configurations. fully parametric SigmaTel SoftEQ initiated upon jack insertion sensed impedance levels. STAC9752/53 also offers styles BEEP, Analog Digital. digital Beep feature added AC'97 Specification 2.3. STAC9752/53 designed primarily support stereo (2-speaker) audio. True AC-3 playback achieved 6-speaker applications taking advantage multi-codec option available STAC9752/53 support three codecs AC'97 architecture. Additionally, STAC9752/53 provides stereo enhancement feature, SigmaTel Surround (SS3D). SS3D provides listener with several options improved speaker separation beyond normal 4speaker arrangements. STAC9752/53 SoundBlaster® Windows Sound System® compatible with SigmaTel's driver Windows 98/2K/ME/XP. SoundBlaster registered trademark Creative Labs. Windows registered trademark Microsoft Corporation.
2-9752-P1-1.0-0402
STAC9752/53
Two-Channel, 20-Bit, AC'97 Codecs with Microphone Jack Sensing
STAC9752/53 BLOCK DIAGRAM
stereo sources mono sources Stereo Mono HP_OUT
Power Management
DACs
AC-link
SYNC BIT_CLK SDATA_OUT SDATA_IN RESET#
Digital Interface
Registers 64x16 bits
MIXER
ADCs Analog mixing Gain Control
LINE_OUT MONO_OUT
Multi-Codec
CID0 CID1
Boost 0,10,20
MIC1 MIC2
Variable Sample Rate 20-Bit DACs 20-Bit ADCs
SPDIF
SPECIFICATIONS Analog LINE_OUT SNR: Digital SNR: Digital SNR: Full-scale Total Harmonic Distortion: 0.02% Crosstalk between Input Channels: Spurious Tone Rejection: RELATED MATERIALS (AVAILABLE SOON) Data Sheet Reference Designs
2-9752-P1-1.0-0402
STAC9752/53
Two-Channel, 20-Bit, AC'97 Codecs with Microphone Jack Sensing STAC9752/53 MIXER
MonoAnalog
2Ah:D5-D4
28h: D5-D4
Slot Select
6Ah:D1
StereoAnalog SPDIF SPDIF Digital
PCMOut
Slot Select
PC_BEEP Phone
20h:D8 0Eh:D6 6E:D2
mute mute mute mute mute mute mute mute
AllAnalog AllRecord -6dB
Digital PCBeep
Headphone Volume
20h:D15
HP_OUT
Analog Audio Sources
MIC1 MIC2 LINEIN VIDEO
-6dB
Master Volume
LINE_OUT
6Eh:D12
20h:D9
Mono Volume
MONO_OUT
Record Volume
38h:D5-D4
Slot Select
PCMIn
ADCRecord Ganged3DControl
20h:D13 22h:D2-D3
Figure STAC9752 2-Channel Mixer Functional Diagram
MonoAnalog
2Ah:D5-D4
Slot Select
28h: D5-D4
StereoAnalog
6Ah:D1
PCMOut
Slot Select
SPDIF
SPDIF
Digital
PC_BEEP Phone MIC1 MIC2
-6dB
mute mute mute mute mute mute mute mute
AllAnalog AllRecord -6dB
Digital PCBeep
Headphone Volume
20h:D15
HP_OUT
20h:D8 0Eh:D6 6E:D2 -6dB
Analog Audio Sources
-6dB
Master Volume
LINE_OUT
LINEIN
-6dB
6Eh:D12
VIDEO -6dB -6dB -6dB -6dB
Mono Volume
MONO_OUT
20h:D9
Record Volume
38h:D5-D4
+6dB
Slot Select
PCMIn
ADCRecord Ganged3DControl
20h:D13 22h:D2-D3
Figure STAC9753 2-Channel Mixer Functional Diagram
2-9752-P1-1.0-0402
STAC9752/53
Two-Channel, 20-Bit, AC'97 Codecs with Microphone Jack Sensing DESCRIPTION
MONO_OUT AVdd2 HP_OUT_L HP_COMM HP_OUT_R AVss2 GPIO0 GPIO1 CID0 CID1 EAPD SPDIF
LINE_OUT_R LINE_OUT_L CAP2 AFILT2 AFILT1 VREFout VREF AVss1 AVdd1
48-Pin TQFP
LINE_IN_R LINE_IN_L MIC2 MIC1 CD_R CD_GND CD_L VIDEO_R VIDEO_L AUX_R AUX_L PHONE
Figure STAC9752/53 Description Drawing
ADDITIONAL SUPPORT
Additional product company information obtained going SigmaTel website www.sigmatel.com
2-9752-P1-1.0-0402
DVdd1 XTL_IN XTL_OUT DVss1 SDATA_OUT BIT_CLK DVss2 SDATA_IN DVdd2 SYNC RESET# PC_BEEP

Two-Channel, 20-Bit, AC'97 Codecs with Microphone Jack Sensing DESCRIP

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