92hd89c Integrated Device Technology, 92hd89c Datasheet - Page 31

• Manufacturer Part Number: 92hd89c
• Description: Six Channel Hd Audio Codec
• Manufacturer: Integrated Device Technology

92HD89C
Six channel HD Audio codec optimized for low power
©2009 INTEGRATED DEVICE TECHNOLOGY, INC.
1.
AFG
Power
State
D0-D3
D0-D3
D0
D1
D2
D2
D3
D3
D3cold
D4
D5
IDT™ CONFIDENTIAL
Override
1.PC_Beep is automatically routed to ports A, B, D, and F after power-on reset while link reset is active and EAPD will be high to
BEEP
When pin is enabled as Open Drain or CMOS output.
0
1
enable an external amplifier. This may be disabled using a vendor specific verb. If the automatic beep path is disabled, beep
will still be supportedwith EAPD active in link reset if Analog Beep is manually enabled and at least one port is configured as
an output before entering link reset. If the automatic Beep routing is disabled and Analog Beep has not been manually con-
figured before entering link reset, then the EAPD pin will retain its current state.
NOTE: Each Headphone port has its own configuration bits for SD, SD MODE, and SD INV..
RESET#
Asserted (Low)
Asserted (Low)
De-Asserted (High)
De-Asserted (High)
De-Asserted (High)
De-Asserted (High)
De-Asserted (High)
De-Asserted (High)
De-Asserted (High)
De-Asserted (High)
De-Asserted (High)
1.EAPD bit is set to one by default but the EAPD state is 0 after power-on reset because the function group
Forced to low when in D2
or D3
Forced low in D2 or D3
unless port is enabled as
output
is not in D0. The state after a single or double function group reset will be compliant with ECR15b
EAPD Pin value
1
BEEP
Override
Enabled
Disabled
-
-
Disabled
Enabled
Disabled
Enabled
-
-
-
Follows description in HD Audio spec. External amplifier is shut down when pin or function
group power state is D2 or D3 independent of value in EAPD bit.
Power state is ignored if port is enabled as output and port EAPD=1 to allow PC_Beep
support in D2 and D3
1
Table 10. EAPD Low Power Behavior
EAPD
Power State
-
-
-
D0-D1
D0-D2
D0-D2
D0-D3
D0-D3
-
-
-
Table 11. EAPD Behavior
31
Pin Behavior
Active high immediately after power on, otherwise the previous
state is retained across FG and link reset events
The previous state is retained across FG and link reset events
Active - Pin reflects EAPD bit unless held low by external source.
Active - Pin reflects EAPD bit unless held low by external source.
Pin forced low to disable external amp
Active - EAPD Pin high if any port EAPD bit =1 and that port also
enabled as output.
Pin forced low to disable external amp
Active - EAPD Pin high if any port EAPD bit=1 and that port also
enabled as output.
Pin forced low to disable external amp
Pin forced low to disable external amp
Pin Hi-Z (off)
Description
V 0.91 08/09
92HD89C