92hd75b Integrated Device Technology, 92hd75b Datasheet - Page 23

• 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
GPIO
#
0
1
2
3
4
5
6
7
1.Default condition.
1.4.13. Analog PC-Beep
1.4.14. Headphone Drivers
1.4.15. GPIO
Supply PKG
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
AVDD
AVDD
32&
32&
32&
48
48
48
48
48
48
48
48
92HD75B does not support automatic routing of the PC_Beep pin to all outputs when the link is in
reset. Analog PC_BEEP is supported using a vendor specific verb.
Mono out and Analog PC Beep share a pin. If legacy Analog PC Beep input and mono out are
required, Port E can be used as an optional Analog PC Beep Input.
This product implements a +3dBV output option on headphone capable ports. (HP output and line
output levels are defined as 1Vrms with an option to enable +3dBV FSOV using a vendor specific
verb.)
1.4.15.1. GPIO Pin mapping and shared functions.
1.4.15.2. Volume/Digital Microphone/GPIO Selection
To determine which function is actually enabled on pins2 and 4, the order of precedence is followed:
1) If the GPIOs are enabled, they override both Volume Control and Digital Mics
2) If the GPIOs are not enabled through the AFG, then at reset, the Volume control is enabled with
the weak pull-up.
3) If BIOS or other software application enables either Digital Microphones inputs through the Con-
figuration Default Register, the Volume is disconnected and the pull-ups are disconnected with the
weak pull-downs enabled.
SPDIF
YES
YES
YES
Out
GPI/O
Table 9. GPIO Pin mapping and shared functions
YES
YES
YES
YES
YES
YES
YES
YES
GPI
GPO
23
VrefOut
YES
ADAT
DMIC
YES
YES
92HD75B
VOL
YES
YES
(GPIO/VOL)
(GPIO/VOL)
(GPIO)
(GPIO)
Pull
50K
50K
50K
50K
50K
50K
50K
Up
1
1
1
(EAPD/SPDIF
Down
(SPDIF)
(DMIC)
(DMIC)
Pull
PC AUDIO
50K
50K
50K
50K
)
V 1.0 01-09