92HD92 Datasheet, PDF (16/306 Pages) Integrated Device Technology – SINGLE CHIP PC AUDIO SYSTEM

92HD92
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
AFG
Power
State
RESET#
D0
De-Asserted
(High)
D1-D2
De-Asserted
(High)
D3
De-Asserted
(High)
D3cold -
D4
-
D5
-
GPIO0
Enable
Input
Enable
Output
Enable
Converter Stream
Dig En
ID
Keep
Alive
En
Pin Behavior
Disabled Disabled -
-
-
Hi-Z (internal pull-down enabled)
Disabled
-
Disabled -
-
Enabled
0
-
Enabled
1-15 -
Active - Pin drives 0 (internal
pull-down NA)
Active - Pin drives SPDIF-format, but
data is zeroes (internal pull-down NA)
Active - Pin drives SPDIFOut1 data
(internal pull-down NA)
Disabled -
-
-
Hi-Z (internal pull-down enabled)
Disabled -
Disabled Disabled
Enabled
-
Enabled
-
-
Active - Pin drives 0 (internal
pull-down NA)
0
Active - Pin drives 0 (internal
pull-down NA)
1
Active - Pin drives SPDIF-format, but
data is zeroes (internal pull-down NA)
Disabled -
-
-
Hi-Z (internal pull-down enabled)
Disabled -
Disabled Disabled
Enabled
-
Enabled
-
-
Hi-Z (internal pull-down enabled)
0
Hi-Z (internal pull-down enabled)
1
Active - Pin drives SPDIF-format, but
data is zeroes (internal pull-down NA)
Disabled Disabled -
-
-
-
Hi-Z (internal pull-down enabled)
-
-
-
-
-
-
Hi-Z (port off)
-
-
-
-
-
-
Hi-Z (port off)
Table 5. SPDIF OUT 1 Behavior
2.2. Mono Output
The Mono Out port source selection, power state, and mute characteristics are all independently
controlled by the mono output port controls. EQ does not apply to this path. An internal 2nd order
band-pass filter is provided to restrict the output frequencies when using mono out to drive an exter-
nal amplified sub-woofer.
The following sources are available for the Mono Out pin:
• DAC0 Output: When selected (by using the port connection list), the DAC0 left and right outputs
are summed together.
• DAC1 Output: When selected (by using the port connection list), the DAC1 left and right outputs
are summed together.
• Mixer Output: When selected (by using the port connection list), the mixer left and right 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.
IDT CONFIDENTIAL
16
©2009 INTEGRATED DEVICE TECHNOLOGY, INC.
V 1.1 1/12
92HD92