stac9272 Integrated Device Technology, stac9272 Datasheet - Page 21

• Manufacturer Part Number: stac9272
• Description: 10-channel High Definition Audio Codec
• Manufacturer: Integrated Device Technology

3. DETAILED DESCRIPTION
IDT™
STAC9271/9272/9273/9274
10-CHANNEL HIGH DEFINITION AUDIO CODEC
3.1.
10-CHANNEL HIGH DEFINITION AUDIO CODEC
Universal Jacks
3.1.1.
IDT’s Universal Jacks
tation.
For the STAC927x family the Universal Jacks
•
•
Note
example, a pin pair cannot be configured as an input and output at the same time. Configuration can
be changed at any time.
Note
when using 2 Headphones simultaneously. See electrical specs for details.
Note
result in significant audio quality degradation of the microphone audio input. In particular, when the
40dB MIC boost is active, the SNR, THD+N and DC offset will significantly degrade regardless of the
input signal level.
Audio Jack Presence Detect
SENSE_A pin is used to detect the presence of plugs in ports A, B, C, and D. SENSE_B pin is used
to detect the presence of plugs in ports E, F, G, ad H. Refer to the reference design for port detect
circuitry. Select the precision of the resistors used as follows:
AVDD Nominal
Voltage (+-5%)
Ports A, B, and D support
• Headphone Out
• Line Out
• Line In
• Mic with 0/10/20/30/40 dB Mic boost
Ports C, E, F, G, H support
• Line Out
• Line In
• Mic with 0/10/20/30/40 dB Mic boost
1
2
3
: On the STAC927x family, only one function can be selected on each pin pair at a time. For
: Three Headphones should not be used simultaneously. Performance degradation will occur
: When the 40dB mic boost feature is enabled, additional gain increases greater than 6dB may
4.5V
3.3V
5V
4V
• Ports G & H do not have VrefOut Support
TM
Resistor Tolerance
(If Port D is used)
TM
Sense A
0.50%
0.10%
1%
1%
technology allows for the greatest flexibility in board design and implemen-
Table 1. Impedance Sense
2
2
IDT CONFIDENTIAL
:
:
(If Port D is not used)
Resistor Tolerance
21
3
3
Sense A
TM
1%
1%
1%
1%
capabilities are as follows
Resistor Tolerance
(If Port H is used)
STAC9271/9272/9273/9274 V 1.0 MARCH2007
Sense B
0.50%
0.10%
1%
1%
1
:
(If Port H is not used)
Resistor Tolerance
Sense B
1%
1%
1%
1%
PC AUDIO