Datasheet

USBHostInterfaceSequence
Power-On,Attach,andPlaybackSequence
D+/D−
2.0 V (Typ.)
0 V
Internal Reset
Ready for Setup
SOF
Ready for Playback
Bus Reset Set Configuration
SOF SOF
BPZ
Bus Idle
3.3 V
(Typ.)
1
st
Audio Data 2
nd
Audio Data
SSPND
V
OUT
L
V
OUT
R
700 µs
Device Setup 1 ms
V
DD
T0055-01
PCM2704, ,PCM2705
PCM2706,PCM2707
SLES081F–JUNE2003–REVISEDJANUARY2009....................................................................................................................................................... www.ti.com
ThePCM2704/5/6/7isreadyforsetupwhentheresetsequencehasfinishedandtheUSBbusisattached.After
aconnectionhasbeenestablishedbysetup,thePCM2704/5/6/7isreadytoacceptUSBaudiodata.While
waitingfortheaudiodata(idlestate),theanalogoutputissettobipolarzero(BPZ).
Whenreceivingtheaudiodata,thePCM2704/5/6/7storesthefirstaudiopacket,whichcontains1msofaudio
data,intotheinternalstoragebuffer.ThePCM2704/5/6/7startsplayingtheaudiodataafterdetectingthenext
subsequentstart-of-frame(SOF)packet.
Figure29.InitialSequence
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ProductFolderLink(s):PCM2704PCM2705PCM2706PCM2707
PCM2704 and PCM2705
Not Recommended For New Designs