92HD73C 데이터 시트보기 (PDF) - Integrated Device Technology

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92HD73C

SIX CHANNEL HD AUDIO CODEC

Integrated Device Technology 

92HD73C

SIX CHANNEL HD AUDIO CODEC, PREMIUM WLP 3/4 COMPLIANT

PC AUDIO

ADC[1:0] CnvtrID

[10:8]

SmplRateDiv

Sample Base Rate Divisor

000= Divide by 1

001= Divide by 2 (not supported)

010= Divide by 3 (not supported)

011= Divide by 4 (not supported)

100= Divide by 5 (not supported)

101= Divide by 6 (not supported)

110= Divide by 7 (not supported)

111= Divide by 8 (not supported)

Bits per Sample

000= 8 bits (not supported)

[6:4]

BitsPerSmpl

001= 16 bits

010= 20 bits

011= 24 bits

100-111= Reserved

Number of Channels

Number of channels for this stream in each “sample

block” of the “packets” in each “frame” on the link.

[3:0]

NmbrChan

0000=1 channel (not supported)

0001 = 2 channels

…

1111= 16 channels.

Bit Number

Sub Field Name

Description

Software-programmable integer representing link

[7:4]

Strm

stream ID used by the converter widget. By

convention stream 0 is reserved as unused.

[3:0]

Ch

Integer representing lowest channel used by

converter.

0 and 2 are valid Entries

If assigned to the same stream, one ADC must be

assigned a value of 0 and the other ADC assigned a

value of 2.

Table 9: Multi-Converter Stream Critical Entries.

1.4.12.

EAPD

The EAPD pin (pin 47) also supports SPDIF_In and GPIO functions. The pin defaults to EAPD after

power on reset and will remain in EAPD mode until either GPIO is enabled for pin 47 or the port I/O

is enabled to support SPDIF. Although named External Amplifier Power Down (EAPD) by the HD

Audio specification, this pin operates as an external amplifier power up signal. The EAPD value is

reflected on the EAPD pin; a 1 causes the external amplifier to power up, and a 0 causes it to power

down. When the EAPD value = 1, the EAPD pin must be placed in a state appropriate to the current

power state of the associated Pin Widget even though the EAPD value may remain 1. The default

state of this pin is 0 (driving low) and a Pull-down prevents the line from floating high when the part is

in reset.

21

SIX CHANNEL HD AUDIO CODEC, PREMIUM WLP 3/4 COMPLIANT

92HD73C

V 1.3 08/11

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