92hd75b Integrated Device Technology, 92hd75b Datasheet - Page 13

• Manufacturer Part Number: 92hd75b
• Description: Four Channel Hd Audio Codec
• Manufacturer: Integrated Device Technology

4-CHANNEL HD AUDIO CODECS OPTIMIZED FOR LOW POWER
92HD75B
4-CHANNEL HD AUDIO CODECS OPTIMIZED FOR LOW POWER
1.4.4.
1.4.5.
D0-D2
D3
AFG Power
State
Output ports are always on to prevent pops/clicks associated with charging and discharging output
coupling capacitors. This maintains proper bias on output coupling caps even in D3 as long as AVDD
is available. Unused ports should be left unconnected. When updating existing designs to use
92HD75B, ensure that there are no conflicts between the output ports on 92HD75B and existing cir-
cuitry.
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 are detected using SENSE_B. The following figure shows external components. All
external resistors are 1%, pull up is 2.5KÙ.
See reference design for more information on Jack Detect implementation.
SPDIF Output
All SPDIF Outputs can operate at 44.1kHz, 48kHz, 88.2kHz, 96kHz and 192KHz as defined in the
Intel High Definition Audio Specification with resolutions up to 24 bits. This insures compatibility with
Output Enable
1
1
0
-
Table 1. Analog Output Port Behavior
Mute
Figure 3. Jack Detect
0
1
-
-
13
Inactive -port is powered on (low output impedance)
Inactive (lower power) - Port keeps output coupling
necessarily the same as in D0) but consumes less
caps charged and has low output impedance (not
Active - audio mute. Port drives silence
but drives silence only.
Active - audio enabled
Port Behavior
power.
92HD75B
PC AUDIO
V 1.0 01-09