STAC9227 Datasheet, PDF (22/237 Pages) Integrated Device Technology – 8-CHANNEL HIGH DEFINITION AUDIO CODEC

STAC9227/9228/9229/9230
8-CHANNEL HIGH DEFINITION AUDIO CODEC
PC AUDIO
3. DETAILED DESCRIPTION
3.1.
Universal Jacks^TM
SigmaTel’s Universal Jacks^TM technology allows for the greatest flexibility in board design and
implementation.
For the STAC9227/9228/9229/9230 family the Universal Jacks^TM capabilities are as follows¹:
• Ports A, B, and D support²:
• Headphone Out
• Line Out
• Line In
• Microphone with 0/10/20/30/40 dB Microphone boost³:
• Ports C, E, F, G, H support²:
• Line Out
• Line In
• Microphone with 0/10/20/30/40 dB Microphone boost³:
• Ports G & H do not have VrefOut Support
Note¹: On the STAC9227/9228/9229/9230 family, only one function can be selected on each pin pair
at a time. For example, a pin pair cannot be configured as an input and output at the same time.
Configuration can be changed at any time.
Note²: Three Headphones should not be used simultaneously. Performance degradation will occur
when using two Headphones simultaneously. See electrical specifications for details.
Note³: When the 40dB microphone boost feature is enabled, gain increases greater than 6dB may
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.
3.1.1.
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 Resistor Tolerance Resistor Tolerance Resistor Tolerance Resistor Tolerance
Voltage
Sense A
Sense A
Sense B
Sense B
(+-5%)
(If Port D is used) (If Port D is not used) (If Port H is used) (If Port H is not used)
5V
1%
1%
1%
1%
4.5 V
1%
1%
1%
1%
4V
0.50%
1%
0.50%
1%
3.3 V
0.10%
1%
0.10%
1%
IDT™ 8-CHANNEL HIGH DEFINITION AUDIO CODEC
22
IDT CONFIDENTIAL
STAC9227/9228/9229/9230V 1.0 MARCH 2007