92HD99 Просмотр технического описания (PDF) - Integrated Device Technology

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92HD99

SINGLE CHIP PC AUDIO SYSTEM

Integrated Device Technology 

92HD99

SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO

2. DETAILED DESCRIPTION

2.1. Port Functionality

Multi-function (Input/Output) ports allow for the highest possible flexibility. 7 bi-directional ports, 2 are

headphone capable, support a wide variety of consumer desktop and mobile system use models.

• Port A supports

• Headphone Out

• Line Out

• Line Input

• Mic with 0/10/20/30 dB Boost

• Port B supports

• Capless Headphone Out

• Capless Line Out

• Port C

• Line In

• Line Out

• Mic with 0/10/20/30 dB Boost

• Port D supports

• BTL stereo out

• Port F supports

• Line In

• Line Out

• Mic with 0/10/20/30 dB Boost

Pins 40-QFN

22/23

25/26

15/16

34/35/37/38

13/14

3 (CLK=2)

Port

A

B

C

D

F

DMIC0

Input Output Headphone BTL

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Table 1. Port Functionality

Mic Bias

(Vref pin)

Yes

Input

boost amp

Yes

Yes

Yes

Yes

Yes

2.1.1.

Port Characteristics

Universal (Bi-directional) jacks are supported on ports A,C, and F. Ports A and B are designed to

drive 32 ohm (nominal) headphones or a 10K (nominal) load. Line Level outputs are intended to

drive an external 10K load (nominal) and an on board shunt resistor of 20-47K (nominal). However,

applications may support load impedances of 5K ohms and above. Input ports are 50K (nominal) at

the pin.

DAC full scale outputs and intended full scale input levels are 1V rms at 5V. Line output ports and

Headphone output ports on the 92HD99 codec may be configured for +3dBV full scale output levels

by using a vendor specific verb.

Output ports are always on to prevent pops/clicks associated with charging and discharging output

coupling capacitors. This maintains proper bias on output coupling caps even in power state D3 as

long as AVDD is available. Unused ports should be left unconnected. When updating existing

IDT CONFIDENTIAL

11

©2009 INTEGRATED DEVICE TECHNOLOGY, INC.

V 0.93 06/11

92HD99

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