Datasheet

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PCM2900
PCM2902
SLES035E–MARCH2007–REVISEDMARCH2008
PCM2900TERMINALFUNCTIONS
TERMINAL
I/ODESCRIPTION
NAMENO.
AGNDC11–Analoggroundforcodec
AGNDP18–AnaloggroundforPLL
AGNDX22–Analoggroundforoscillator
D–2I/OUSBdifferentialinput/outputminus
(1)
D+1I/OUSBdifferentialinput/outputplus
(1)
DGND26–Digitalground
DGNDU4–DigitalgroundforUSBtransceiver
HID05IHIDkeystateinput(mute),active-high
(2)
HID16IHIDkeystateinput(volumeup),active-high
(2)
HID27IHIDkeystateinput(volumedown),active-high
(2)
SEL08IMustbesettohigh
(3)
SEL19IMustbesettohigh
(3)
SSPND28OSuspendflag,active-low(Low:suspend,High:operational)
TEST024ITestpin,mustbeconnectedtoGND
TEST125OTestpin,mustbeleftopen
V
BUS
3–ConnecttoUSBpower(V
BUS
)
V
CCCI
10–Internalanalogpowersupplyforcodec
(4)
V
CCP1I
17–InternalanalogpowersupplyforPLL
(4)
V
CCP2I
19–InternalanalogpowersupplyforPLL
(4)
V
CCXI
23–Internalanalogpowersupplyforoscillator
(4)
V
COM
14–CommonforADC/DAC(V
CCCI
/2)
(4)
V
DDI
27–Internaldigitalpowersupply
(4)
V
IN
L12IADCanaloginputforL-channel
V
IN
R13IADCanaloginputforR-channel
V
OUT
L16ODACanalogoutputforL-channel
V
OUT
R15ODACanalogoutputforR-channel
XTI21ICrystaloscillatorinput
(5)
XTO20OCrystaloscillatoroutput
(1)LV-TTLlevel
(2)3.3-VCMOS-levelinputwithinternalpulldown.ThispininformsthePCofserviceablecontrolsignalssuchasmute,volumeup,or
volumedown,whichhavenoconnectionwiththeinternalDACorADCdirectly.SeetheInterface#3andEnd-Pointssections.
(3)TTLSchmitttrigger,5-Vtolerant
(4)ConnectadecouplingcapacitortoGND.
(5)3.3-VCMOS-levelinput
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