STAC9220 Datasheet, PDF (23/172 Pages) Integrated Device Technology – 8-CHANNEL HIGH DEFINITION AUDIO CODEC

STAC9220/9221/9223
8-CHANNEL HIGH DEFINITION AUDIO CODEC
PC AUDIO
4. DETAILED DESCRIPTION
4.1. 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 and F. Refer to the reference design for port detect cir-
cuitry. Select the precision of the resistor used as follows.
Nominal Voltage
(+-5%)
5V
4.5V
4V
3.3V
Table 4. Audio Jack Presence Detect
Resistor Tolerance
Sense A
(If port D is used)
1%
1%
0.50%
0.10%
Resistor Tolerance
Sense A
(If port D is not used)
1%
1%
1%
1%
Resistor Tolerance
Sense B
(For ports E and F)
1%
1%
1%
1%
4.2. SPDIF Input
SPDIF IN can operate at 44.1 KHz, 48 KHz or 96 KHz, and implements internal Jack Sensing.
A sophisticated digital PLL allows automatic rate detection and accurate data recovery. The ability to
directly accept consumer SPDIF voltage levels eliminates the need for costly external receiver ICs.
Advanced features such as record-slot select and SPDIF_IN routing to the DAC allows for simulta-
neous record and play.
4.3. SPDIF Output
SPDIF Output can operate at 44.1 KHz, 48 KHz and 96 KHz, as defined in the Intel High Definition
Audio Specification, with resolutions up to 24 bits. This insures compatibility with all consumer audio
gear and allows for convenient integration into home theater systems and media center PCs.
IDT™
8-CHANNEL HIGH DEFINITION AUDIO CODEC
23
STAC9220/9221/9223
V 0.96 102706