92HD66B IDT [Integrated Device Technology], 92HD66B Datasheet - Page 21

• Manufacturer Part Number: 92HD66B
• Description: FOUR CHANNEL HD AUDIO CODECS
• Manufacturer: IDT [Integrated Device Technology]

92HD66B
FOUR CHANNEL HD AUDIO CODECS WITH DUAL CAPLESS HEADPHONE AMPLIFIERS
©2011 INTEGRATED DEVICE TECHNOLOGY, INC.
2.18. EAPD
ADC[1:0] Cnvtr
The EAPD pin (pin 47) is a dedicated, bi-directional control pin. 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 (equivalent to D0), and a 0 causes it to power down (equivalent to D3.) When the EAPD value =
[15]
[14]
[13:11]
[10:8]
[6:4]
[3:0]
[7:4]
[3:0]
Bit Number
StrmType
FrmtSmplRate
SmplRateMultp
SmplRateDiv
BitsPerSmpl
NmbrChan
Strm
Ch
Sub Field Name
Table 10: Multi-channel
21
Stream Type (TYPE):
0: PCM
1: Non-PCM (not supported)
Sample Base Rate
0= 48kHz
1=44.1KHz
Sample Base Rate Multiple
000=48kHz/44.1kHz or less
001= x2
010= x3 (not supported)
011= x4 192kHz only, 176.4 not supported
100-111= Reserved
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)
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.
0000=1 channel (not supported)
0001 = 2 channels
1111= 16 channels.
Software-programmable integer representing link
stream ID used by the converter widget. By conven-
tion stream 0 is reserved as unused.
Integer representing lowest channel used by con-
verter.
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.
…
Description
V 1.0 2/12
92HD66B