IDTSTAC9753AXNAED1XR IDT, Integrated Device Technology Inc, IDTSTAC9753AXNAED1XR Datasheet - Page 36

• 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
5.3.1.
valid time slot, the AC‘97 Controller always stuffs all trailing non-valid bit positions of the 20-bit slot
with 0s.
As an example, consider an 8-bit sample stream that is being played out to one of the STAC9752A/
9753A DACs. The first 8-bit positions are presented to the DAC (MSB justified) followed by the next
12 bit-positions which are stuffed with 0s by the AC‘97 Controller. This ensures that regardless of the
resolution of the implemented DAC (16, 18 or 20-bit), no DC biasing will be introduced by the least
significant bits.
When mono audio sample streams are output from the AC‘97 Controller it is necessary that BOTH
left and right sample stream time slots be filled with the same data.
Slot 0: TAG / CODEC ID
S D A T A _ O U T
12-3
Note: The DAC can be assigned to slots 3&4, 6&9, 7&8, or 10&11.
1-0
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
B I T _ C L K
E n d o f p r e v i o u s a u d i o f r a m e
S Y N C
2-bit CODEC ID field (00 reserved for Primary; 01, 10, 11 indicate Secondary)
Slot 1 Primary CODEC Valid Command Address bit (Primary CODEC only)
Slot 2 Primary CODEC Valid Command Data bit (Primary CODEC only)
a s s e r t e d
S Y N C
Slot 5: Modem Line 1 (not used on STAC9752A/9753A)
Table 7. Output Slot 0 Bit Definitions
36
Slot 8: Alternative PCM2 Right
Slot 9: Alternative PCM1 Right
Slot 6: Alternative PCM1 Left
Slot 7: Alternative PCM2 Left
d e t e c t e d b y
Slot 4: PCM Right channel
Slot 3: PCM Left channel
Slot 3-12 Valid Data bits
S Y N C
Slot 11: SPDIF Right
c o d e c
Slot 12: Audio GPIO
Reserved (Set to 0)
Slot 10: SPDIF Left
F r a m e
Description
Frame Valid
v a l i d
s l o t 1
S D A T A _ O U T
b i t o f f r a m e
STAC9752A/9753A
f i r s t
s l o t 2
PC AUDIO
V 1.5 1206