92HD66C Datasheet, PDF (11/291 Pages) Integrated Device Technology – SIX CHANNEL HD AUDIO CODECS

92HD66C
SIX CHANNEL HD AUDIO CODECS WITH DUAL CAPLESS HEADPHONE AMPLIFIERS
2. DETAILED DESCRIPTION
2.1. Port Functionality
Pins (40-pin)
22/23/32/33
24/25/35/36
14/15
-
-
12/13
40
38
37
3 (CLK=2)
Pins (48-pin)
29/30/39/40
31/32/42/43
19/20
-
15/16
17/18
48
46
45
4 (CLK=2)
Port
A
B
C
D
E
F
SPDIF_OUT0
SPDIF_OUT1
SPDIF_IN
DMIC0
Input
Yes
Yes
Yes
Output
Yes
Yes
Yes
Head
phone
Yes
Yes
Mic Bias
(Vref pin)
Yes¹
Yes¹
Yes
Input
boost amp
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes²
Yes
Yes²
Yes
Yes
Yes
Yes
Yes
Yes³
Yes³
Yes
Table 1. Port Functionality
1. Ports A and B provide internal microphone bias on the headphone out pins. No external VrefOut pin is
needed.
2. DMIC1
3. Boost amp is only available for DMIC input and is not associated with the pin widget
2.2. Port Characteristics
Universal (Bi-directional) jacks are supported on ports A, B, C, E, and F. Ports A, B, and F 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 2.8K ohms and above when implementing
ports capable of operating as microphone inputs or line outputs. Input ports are 75K (nominal) at the
pin.
DAC full scale outputs and intended full scale input levels are greater than 1V rms at 5V (+5%/
-10%) to meet WLP requirements. Line output ports and Headphone output ports on the codec may
be configured for +3dBV full scale output levels by using a vendor specific verb.
Output ports implement anti-pop circuits to prevent pops/clicks associated with turning power on/off
or charging and discharging output coupling capacitors (except for cap-less headphone ports).
Unused ports should be left unconnected. When updating existing designs to use the codec, ensure
that there are no conflicts between the output ports on the codec and existing circuitry.
AFG
Power
State
Input Output
Enable Enable
D0-D2
1
1
1
1
Used as
output for
DAC/Mixer
Don’t care
Don’t care
Used as
output for
analog
PC_Beep
Don’t care
Don’t care
Used as
input for
ADC, mixer
Port Behavior
Yes
Not allowed. Port is active as Input.
No
Not allowed. Inactive (Power Down) - Port
keeps output coupling caps charged if port
uses caps.
Table 2. Analog Output Port Behavior
IDT CONFIDENTIAL
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92HD66C