Datasheet
PCM2902BPINASSIGNMENTS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
D+
D–
V
BUS
DGNDU
HID0
HID1
HID2
SEL0
SEL1
V
CCCI
AGNDC
V L
IN
V R
IN
V
COM
SSPND
DIN
V
CCXI
AGNDX
XTO
V
CCP2I
DGND
V
CCP1I
V L
OUT
XTI
DOUT
V
DDI
AGNDP
V R
OUT
PCM2902B
PCM2900B
PCM2902B
www.ti.com
...........................................................................................................................................................................................SLES229–DECEMBER2008
DBPACKAGE
SSOP-28
(TOPVIEW)
Table2.PCM2902BTERMINALFUNCTIONS
TERMINAL
NAMENO.I/ODESCRIPTION
AGNDC11–Analoggroundforcodec
AGNDP18–AnaloggroundforPLL
AGNDX22–Analoggroundforoscillator
D–2I/OUSBdifferentialinput/outputminus
(1)
D+1I/OUSBdifferentialinput/outputplus
(1)
DGND26–Digitalground
DGNDU4–DigitalgroundforUSBtransceiver
DIN24IS/PDIFinput
(2)
DOUT25OS/PDIFoutput
HID05IHIDkeystateinput(mute),activehigh
(3)
HID16IHIDkeystateinput(volumeup),activehigh
(3)
HID27IHIDkeystateinput(volumedown),activehigh
(3)
SEL08IMustbesettohigh
(4)
SEL19IMustbesettohigh
(4)
SSPND28OSuspendflag,active-low(Low:suspend,High:operational)
V
BUS
3–ConnecttoUSBpower(V
BUS
)
V
CCCI
10–Internalanalogpowersupplyforcodec
(5)
V
CCP1I
17–InternalanalogpowersupplyforPLL
(5)
V
CCP2I
19–InternalanalogpowersupplyforPLL
(5)
V
CCXI
23–Internalanalogpowersupplyforoscillator
(5)
V
COM
14–CommonforADC/DAC(V
CCCI
/2)
(5)
V
DDI
27–Internaldigitalpowersupply
V
IN
L12IADCanaloginputforL-channel
V
IN
R13IADCanaloginputforR-channel
V
OUT
L16ODACanalogoutputforL-channel
V
OUT
R15ODACanalogoutputforR-channel
XTI21ICrystaloscillatorinput
(6)
XTO20OCrystaloscillatoroutput
(1)LV-TTLlevel.
(2)3.3-VCMOS-levelinputwithinternalpulldown,5-Vtolerant.
(3)3.3-VCMOS-levelinputwithinternalpulldown.ThispininformsthePCofserviceablecontrolsignalssuchasmute,volumeup,or
volumedown,whichhavenoconnectionwiththeinternalDACorADCdirectly.SeetheInterface#3andEnd-Pointssections.
(4)TTLSchmitttrigger,5-Vtolerant.
(5)ConnectadecouplingcapacitortoGND.
(6)3.3-VCMOS-levelinput.
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