IDTSTAC9751XXTAEC1XR IDT, Integrated Device Technology Inc, IDTSTAC9751XXTAEC1XR Datasheet - Page 52

• 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
6.5.25.2. ADC Data on AC LINK
Bits D5-D4 select slots for ADC data on ACLINK.
6.5.25.3. MuteFix Disable
Bit D6 controls the enable and disable of the MuteFix functions.
•
•
When this bit is zero, and either channel is set to -46.5dB attenuation (1Fh), then that channel is fully
muted. When this bit is one, then operation is per AC’97 specification.
This bit is reserved in revisions prior to CC1.
6.5.25.4. Mic Boost Select
The Mic boost value can be selected with bit D2, which in enabled by Register 0Eh, bit D6. Writing a
zero to bit D2 will provide 20dB of Mic Boost. Writing a one will provide 30dB of Mic Boost.
6.5.25.5. Supply Override Select
The Supply Override bit, D1, allows override of the supply detect. Writing a zero disables the over-
ride on supply detect. Writing a one, overrides supply detect with bit D0. Bit D0 provides the supply
override value. A zero forces 3.3 V analog operation and one forces 5 V analog operation.
0 = MUTE FIX Enabled
1 = MUTE FIX Disabled
Value
Value
00
01
10
11
0
1
Table 36. ADC data on AC LINK
Table 37. Mic Boost Select
52
left slot 10, right slot 11
left slot 3, right slot 4
left slot 7, right slot 8
left slot 6, right slot 9
STAC9750/9751
Function
Function
20dB
30dB
PC AUDIO
V 5.8 103106