IDT92HD81B1X5NLGXYCX8 IDT, Integrated Device Technology Inc, IDT92HD81B1X5NLGXYCX8 Datasheet - Page 38

• Manufacturer Part Number: IDT92HD81B1X5NLGXYCX8
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT92HD81B1X5NLGXYCX8

• Lead Free Status / RoHS Status: Compliant

92HD81
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
©2009 INTEGRATED DEVICE TECHNOLOGY, INC.
IDT™ CONFIDENTIAL
2.22.3. “Record Path” Port Behavior
EAPD
(pin)
1.default value for Aux Audio Enable is determined by bond option.
0
1
1
1
1
1
1
1
1
1
Support
Enable
Digital Microphone input DMIC0 is used as an internal microphone port. The Digital Microphone
clock pin is used as a clock input. The data on the DMIC0 pin is converted into analog audio using
DAC 0 and sent to Port E (Aux Audio Out.) The expected clock input rate is 3.072MHz. Although this
rate is not guaranteed, existing digital microphones are operated from about 1.5-3.2MHz. The
CODEC does not provide gain for the digital microphone path in this mode and external gain of
20-30dB implemented at the output of Port E is expected for acceptable operation. Any DC offset
from the digital microphone is removed by the AC coupling caps required on Port E.
If Port F presence detect = 0, this indicates that nothing is plugged into Aux Audio In and the digital
microphone input is sent to port E. If Port F presence detect = 1, this indicates that an external
source is plugged into the Aux Audio In. The DAC and Port E are disabled.
Aux
NA
0
1
1
1
1
1
1
1
1
1
Port E
detect
NA
NA
0
0
0
0
1
1
1
1
Port B
detect
NA
NA
0
0
1
1
0
0
1
1
Port A
detect
NA
NA
0
1
0
1
0
1
0
1
DMIC detect
Port C, D, F,
38
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
(F to mix to D)
controlled
behavior
disabled
disabled
disabled
disabled
disabled
disabled
disabled
disabled
enabled
Port D
Widget
(F to mix to B)
(F to mix to B)
(F to mix to B)
(F to mix to B)
controlled
behavior
disabled
disabled
disabled
disabled
disabled
enabled
enabled
enabled
enabled
Widget
Port B
(F to mix to A)
(F to mix to A)
(F to mix to A)
(F to mix to A)
controlled
behavior
disabled
disabled
disabled
disabled
disabled
enabled
enabled
enabled
enabled
V 0.987 11/09
Widget
Port A
92HD81