92hd71b5x5prgxb3x8 Integrated Device Technology, 92hd71b5x5prgxb3x8 Datasheet - Page 14

• Manufacturer Part Number: 92hd71b5x5prgxb3x8
• Description: Four Channel Hd Audio Codec, Low Power Optimized, 4-ports, 95db Snr
• Manufacturer: Integrated Device Technology

4-CHANNEL HD AUDIO CODECS OPTIMIZED FOR LOW POWER
92HD71B5
4-CHANNEL HD AUDIO CODECS OPTIMIZED FOR LOW POWER
On
On
On
On
On
On
On
On
On
On
On
D0
1.4.7.
1.4.8.
1.4.9.
D1
Off
Off
Off
Off
Off
Off
On
On
On
On
On
DAC1 Output: When enabled (by using port connection list), both DAC1 Outputs are summed
together.
Input Mixer: When enabled (by using mono mix connection list and DAC mixer), both mixer outputs
are summed together.
The stereo inputs are scaled by -6dB and then summed to provide an output that is the average of
the two inputs. The full scale output at mono out is designed to be about 0dBV. It is not possible to
adjust to a +3dBV output level.
Input Multiplexers
92HD71B5 implements 2 port input multiplexers. These multiplexers incorporate the microphone
boost function (0, 10dB, 20dB, 30dB, and 40dB gain) as an output amp and allow a preselection of
one of three possible inputs:
Port B
Port C
NOTE: Changing the Input multiplexer setting will affect the ADC.
ADC Multiplexers
92HD71B5 implements 2 ADC input multiplexers. These multiplexers incorporate the ADC record
gain function (0 to +22.5dB gain in 1.5dB steps) as an output amp and allow a preselection of one of
four possible inputs:
•
•
•
Power Management
The following table describes what functionality is active in each power state
The D3-default state is available for HD Audio compliance. The programmable values, exposed via
vendor-specific settings, are under the IDT Device Driver control for further power reduction.
The default power state for the Audio Function Group after reset is D3-default..
DMIC 0
DMIC1
InPortMux (ADC0 selects inport0_mux / ADC1 selects inport1_mux)
D2
Off
Off
Off
Off
Off
Off
Off
Off
On
On
On
1
Low Drive2
Low Drive
Low Drive
Table 5. Power Managemen
Off
Off
Off
Off
Off
Off
Off
Off
D3
2
3
vendor specific
14
Programmable
Programmable
Programmable
-
-
-
-
-
-
-
-
92HD71B5
ADC Volume Control
Analog Clocks
VrefOut Pins
Input Boost
Function
HP Amps
VAG amp
Ref ADC
Lo Amp
DAC
ADC
D2S
PC AUDIO
V 1.0, 01/08