IDTSTAC9751XXTAEC1XR IDT, Integrated Device Technology Inc, IDTSTAC9751XXTAEC1XR Datasheet - Page 45

• Manufacturer Part Number: IDTSTAC9751XXTAEC1XR
• Description: IC CODEC AC'97 2CH VALUE 48-LQFP
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Audio Codec '97r

Specifications of IDTSTAC9751XXTAEC1XR

• Resolution (bits): 18 b, 20 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• S/n Ratio, Adcs / Dacs (db) Typ: 85 / 89
• 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: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: STAC9751XXTAEC1XR

IDT™
VALUE-LINE TWO-CHANNEL AC’97 CODECS
STAC9750/9751
VALUE-LINE TWO-CHANNEL AC’97 CODECS
6.5.13.
6.5.12.4. SPSA1, SPSA0 (SPDIF Slot Assignment)
SPSA1 and SPSA0 combine to provide the slot assignments for the SPDIF data. The following
details the slot assignment relationship between SPSA1 and SPSA0.
The STAC9750/9751 are AMAP compliant with the following table.
PCM DAC Rate Registers (2Ch and 32h)
The internal sample rate for the DACs and ADCs are controlled by the value in these read/write reg-
isters that contain a 16-bit unsigned value between 0 and 65535 representing the conversion rate in
Hertz (Hz). In VRA mode (register 2Ah bit D0 = 1), if the value written to these registers is supported,
that value will be echoed back when read, otherwise the closest (higher in the case of a tie) sample
rate is supported and returned. Per PC 99 / PC 2001 specification, independent sample rates are
supported for record and playback. Whenever VRA is set to 0, the PCM rate registers (2Ch and 32h)
will read back with BB80h (48 KHz).
CODEC
SPSA[1,0]
00
01
10
11
ID
00
01
10
11
2-channel Primary w/SPDIF
2-channel Dock CODEC w/SPDIF
+2-channel Surr w/ SPDIF
+2-channel Cntr/LFE w/ SPDIF
Table 25. Slot assignment relationship between SPSA1 and SPSA0
Sample Rate
11.025 KHz
22.05 KHz
44.1 KHz
16 KHz
32 KHz
48 KHz
8 KHz
Function
Slot Assignment
Table 27. Hardware Supported Sample Rates
Table 26. STAC9750/9751 AMAP compliant
10 & 11
3 & 4
7 & 8
6 & 9
45
Note: * is the default slot assignment
SPSA = 00
3 & 4
3 & 4
3 & 4
3 & 4
SPDIF source data slot assignment
2-channel CODEC primary default
4-channel CODEC primary default
6-channel CODEC primary default
SPSA = 01
7 & 8*
7 & 8
7 & 8
7 & 8
STAC9750/9751
SR15-SR0 Value
Comments
AC44h
7D00h
BB80h
1F40h
2B11h
3E80h
5622h
SPSA = 10
6 & 9*
6 & 9*
6 & 9
6 & 9
PC AUDIO
SPSA = 11
10 & 11*
10 & 11
10 & 11
10 & 11
V 5.8 103106