92hd99 Integrated Device Technology, 92hd99 Datasheet - Page 29

• Manufacturer Part Number: 92hd99
• Description: Single Chip Pc Audio System Codec+speaker Amplifier+capless Hp+ldo
• Manufacturer: Integrated Device Technology

92HD99
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
IDT CONFIDENTIAL
©2009 INTEGRATED DEVICE TECHNOLOGY, INC.
2.21. GPIO
2.22. HD Audio HDA015-B support
GPIO
2.21.1. GPIO Pin mapping and shared functions
2.21.2. Digital Microphone/GPIO Selection
2.21.3. Digital Microphone/GPIO Selection
#
0
1
2
3
4
Pin
Detection of a microphone is not reported unless plug insertion is also detected.
38
38
20
Functions are available on the GPIO0 pin. To determine which function is enabled, the order of pre-
cedence is followed:
1. If the GPIOs are enabled, they override Digital Mics
2. If the GPIOs are not enabled through the AFG, then at reset, the pin is pulled low by an internal
3. If the port is enabled as an input, the digital microphones will be used.
4. In the event that the port is enabled as an input and an output, the port will be an output and the
2 functions are available on the DMIC_CLK/GPIO1 (pin 2) and the DMIC_0/GPIO2 (pin 4) pins. To
determine which function is enabled, the order of precedence is followed:
1. If GPIOs are not enabled through the AFG, then at reset, pins 2 and 4 are pulled low by an inter-
2. If the GPIO 1 is enabled, the 2 DMIC pins become mute (unless programmed for GPIO use) and
3. If GPIO2 is enabled through the AFG, pin 4 becomes a GPIO and is pulled low by an internal
4. If the port is enabled as an input, the digital microphones will be used.
5. If the port is not enabled as an input or if the pin is configured as a GPIO, the digital microphone
The codec provides complete support for the HDA015-B specification (now DCN) building on the
support already present in previous products. HDA015-B features supported are:
1. Persistence of many configuration options through bus and function group reset.
2. The ability to support port presence detect in D3 even when the HD Audio bus is in a low power
3. Fast resume times from low power states: 1ms D1 to D0, 2ms D2 to D0, 10mS D3 to D0.
2
3
pull-down resistor.
Digital Mic path will be mute.
nal pull-down resistor.
pin 2 becomes GPIO with an internal pull-down.
pull-down resistor.
path will be mute.
state (no clock.)
Supply
DVDD
DVDD
DVDD
DVDD
AVDD
GPI/O
YES
YES
YES
YES
YES
GPI
GPO
29
VrefOut
YES
DMIC
CLK
IN
IN
VOL
Pull
Up
Down
Pull
50K
50K
50K
50K
50K
V 0.91 10/10
92HD99