92hdw74c2 Integrated Device Technology, 92hdw74c2 Datasheet - Page 14

• Manufacturer Part Number: 92hdw74c2
• Description: Six Channel Hd Audio Codec
• Manufacturer: Integrated Device Technology

SIX CHANNEL HD AUDIO CODEC
92HDW74C2
SIX CHANNEL HD AUDIO CODEC
D0-D2
D3
AFG Power
Voltage (+/- 5%)
AVdd Nominal
State
1.4.3.
1.4.4.
4.75V
3.3V
5V
4V
Input Enable
Jack Detect
Plugs inserted to a jack on Ports A, B, C, & D are detected using SENSE_A. Plugs inserted to a jack
on Ports E, F, G, and H are detected using SENSE_B. The following table summarizes the proper
resistor tolerances for different analog supply voltages.
SENSE_C, is different from SENSE_A and SENSE_B. Because SENSE_C only determines the
presence of a plug for the CD port (port I), SENSE_C is a simple digital input pin referenced to the
analog supply. An internal pull-up resistor is provided. No external resistors are needed (jack switch
shorts to ground when a plug is inserted.) If external components are added, or if the pin is driven by
a logic gate, care should be taken to ensure that the pin voltage is above 70% of AVDD when no
plug is in the jack and less than 30% AVDD when a plug is inserted
See reference design for more information on Jack Detect implementation.
SPDIF Output
All SPDIF Outputs can operate at 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4KHz, and 192KHz 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.
Note: Peak to peak jitter is currently limited to less than 4.5nS (half of the internal master clock cycle)
which does not meet the IEC-60958-3 0.05UI requirement at 192KHz.
Resistor Tolerance
1
1
0
0
0
(If port D used)
SENSE_A
0.50%
0.10%
1%
1%
Output Enable
1
0
1
1
0
Table 3: SENSE Resistor Tolerance
-
Table 2. Analog I/O Port Behavior
(If port D is not used)
Resistor Tolerance
SENSE_A
1%
1%
1%
1%
Mute
0
1
-
-
-
-
14
Inactive - Port keeps coupling caps charged (same
Inactive (lower power) - Port keeps output coupling
Resistor Tolerance
Mute - port enabled as output but drives silence
(If port H used)
caps charged but consumes less power.
SENSE_B
0.50%
0.10%
Not allowed. Port becomes input.
1%
1%
Active - port enabled as output
Active - port enabled as input
92HDW74C2
Port Behavior
as mute.)
(If port H is not used)
Resistor Tolerance
SENSE_B
1%
1%
1%
1%
PC AUDIO
V 1.0 03/08