IDTSTAC9753AXNAED1XR IDT, Integrated Device Technology Inc, IDTSTAC9753AXNAED1XR Datasheet - Page 38

• Manufacturer Part Number: IDTSTAC9753AXNAED1XR
• Description: IC CODEC AC'97 MIC/JACK 32-QFN
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Audio Codec '97r

Specifications of IDTSTAC9753AXNAED1XR

• Resolution (bits): 20 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• S/n Ratio, Adcs / Dacs (db) Typ: 85 / 92
• Voltage - Supply, Analog: 3.14 V ~ 3.47 V; 4.75 V ~ 5.25 V
• Voltage - Supply, Digital: 3.14 V ~ 3.47 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 32-QFN
• Single Supply Voltage (typ): 3.3/5V
• Single Supply Voltage (min): 3.135V
• Single Supply Voltage (max): 3.465/5.25V
• Package Type: VFQFPN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: STAC9753AXNAED1XR

IDT™
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
STAC9752A/9753A
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
5.4.
5.3.4.
5.3.5.
5.3.6.
5.3.7.
5.3.8.
AC-Link Input Frame (SDATA_IN)
Slot 3: PCM Playback Left Channel
AC-Link output frame slot 3 is the composite digital audio left playback stream. In a typical “Games
Compatible” PC this slot is composed of standard PCM (.wav) output samples digitally mixed (on the
AC‘97 Controller or host processor) with music synthesis output samples. If a sample stream of res-
olution less than 20-bits is transferred, the AC‘97 Controller must stuff all trailing non-valid bit posi-
tions within this time slot with 0s.
The DAC can be assigned to slots 3&4, 6&9, 7&8, or 10&11.
Slot 4: PCM Playback Right Channel
AC-Link output frame slot 4 is the composite digital audio right playback stream. In a typical “Games
Compatible” PC this slot is composed of standard PCM (.wav) output samples digitally mixed (on the
AC‘97 Controller or host processor) with music synthesis output samples. If a sample stream of res-
olution less than 20-bits is transferred, the AC‘97 Controller must stuff all trailing non-valid bit posi-
tions within this time slot with 0s.
The DAC can be assigned to slots 3&4, 6&9, 7&8, or 10&11.
Slot 5: NOT USED (Modem Line 1 Output Channel)
Audio output frame slot 5 is reserved for modem operation and is not used by the STAC9752A/
9753A
Slot 6 -11: DAC
The DAC can be assigned to slots 3&4, 6&9, 7&8, or 10&11.
Slot 12: Audio GPIO Control Channel
AC-Link output frame slot 12 contains the audio GPIO control outputs.
The AC-Link input frame data streams correspond to the multiplexed bundles of all digital input data
targeting the AC‘97 Controller. As is the case for an audio output frame, each AC-Link input frame
consists of twelve 20-bit time slots. Slot 0 is a special reserved time slot containing 16-bits which are
used for AC-Link protocol infrastructure.
The following diagram illustrates the time slot-based AC-Link protocol.
A new AC-Link input frame begins with a low to high transition of SYNC. SYNC is synchronous to
the rising edge of BIT_CLK. On the immediately following falling edge of BIT_CLK, the AC‘97
CODEC samples the assertion of SYNC. This falling edge marks the time when both sides of
.
Figure 17. STAC9752A/9753A Audio Input Frame
38
STAC9752A/9753A
PC AUDIO
V 1.5 1206