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2.4.7UniversalSerialBus(USB)Interface
2.4.8AudioInterfaces
TMS320DM355
DigitalMediaSystem-on-Chip(DMSoC)
SPRS463A–SEPTEMBER2007–REVISEDSEPTEMBER2007
TheUniversalSerialBus(USB)interfacesupportstheUSB2.0High-Speedprotocolandincludesdual-role
Host/Slavesupport.However,nochargepumpisincluded.
Table2-13.USBTerminalFunctions
TERMINAL
TYPE
(1)
OTHER
(2)(3)
DESCRIPTION
NAMENO.
USBD+(differentialsignalpair).
USB_DPA7AI/O/ZV
DDA33_USB
WhenUSBisnotused,thissignalshouldbeconnectedtoV
SS_USB
.
USBD-(differentialsignalpair).
USB_DMA6AI/O/ZV
DDA33_USB
WhenUSBisnotused,thissignalshouldbeconnectedtoV
SS_USB
.
USBreferencecurrentoutput
ConnecttoVSS_USB_REFvia10Kohm,1%resistorplacedasclosetothe
USB_R1C7AI/O/Z
deviceaspossible.
WhenUSBisnotused,thissignalshouldbeconnectedtoV
SS_USB
.
USBoperatingmodeidentificationpin
ForDevicemodeoperationonly,pullupthispintoVDDwitha1.5Kohmresistor.
ForHostmodeoperationonly,pulldownthispintoground(VSS)witha1.5K
USB_IDD5AI/O/ZV
DDA33_USB
ohmresistor.
IfusinganOTGormini-USBconnector,thispinwillbesetproperlyviathe
cable/connectorconfiguration.
WhenUSBisnotused,thissignalshouldbeconnectedtoV
SS_USB
.
Forhostordevicemodeoperation,tietheVBUS/USBpowersignaltotheUSB
connector.
USB_VBUSE5AI/O/ZV
DD
WhenusedinOTGmodeoperation,tieVBUStotheexternalchargepumpand
totheVBUSsignalontheUSBconnector.
WhentheUSBisnotused,tieVBUStoVss_USB.
Digitaloutputtocontrolexternal5Vsupply
USB_DRVVBUSC5O/ZV
DD
WhenUSBisnotused,thissignalshouldbeleftasaNoConnect.
USBGroundReference
V
SS_USB_REF
C8GNDV
DD
ConnectdirectlytogroundandtoUSB_R1via10Kohm,1%resistorplacedas
closetothedeviceaspossible
Analog3.3VpowerUSBPHY
V
DDA33_USB
J8PWRV
DD
WhenUSBisnotused,thissignalshouldbeconnectedtoV
SS_USB
.
Commonmode3.3VpowerforUSBPHY(PLL)
V
DDA33_USB_PLL
B6PWRV
DD
WhenUSBisnotused,thissignalshouldbeconnectedtoV
SS_USB
.
Analog1.3VpowerforUSBPHY
V
DDA13_USB
H7PWRV
DD
WhenUSBisnotused,thissignalshouldbeconnectedtoV
SS_USB
.
Digital1.3VpowerforUSBPHY
V
DDD13_USB
C6PWRV
DD
WhenUSBisnotused,thissignalshouldbeconnectedtoV
SS_USB
.
(1)I=Input,O=Output,Z=Highimpedance,S=Supplyvoltage,GND=Ground,A=Analogsignal.
(2)SpecifiestheoperatingI/Osupplyvoltageforeachsignal.SeeSection5.3,PowerSuppliesformoredetail.
(3)PD=pull-down,PU=pull-up.(Topullupasignaltotheoppositesupplyrail,a1kΩresistorshouldbeused.)
TheDM355includestwoAudioSerialPorts(ASPports),whicharebackwardcompatiblewithotherTI
ASPserialportsandprovideI2Saudiointerface.OneinterfaceismultiplexedwithGIOsignals.
Table2-14.ASPTerminalFunctions
TERMINAL
TYPE
(1)
OTHER
(2)(3)
DESCRIPTION
NAMENO.
ASP0_CL
ASP0:ReceiveClock
KR/F17I/O/ZV
DD
GIO:GIO[026]
GIO026
(1)I=Input,O=Output,Z=Highimpedance,S=Supplyvoltage,GND=Ground,A=Analogsignal.
(2)SpecifiestheoperatingI/Osupplyvoltageforeachsignal.SeeSection5.3,PowerSuppliesformoredetail.
(3)PD=pull-down,PU=pull-up.(Topullupasignaltotheoppositesupplyrail,a1kΩresistorshouldbeused.)
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