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3.6JTAGID(JTAGID)RegisterDescription
SM320C6455-EP
FIXED-POINTDIGITALSIGNALPROCESSOR
SPRS462B–SEPTEMBER2007–REVISEDJANUARY2008
Table3-13.DeviceStatusRegister(DEVSTAT)FieldDescriptions(continued)
BitFieldValueDescription
3:0BOOTMODE[3:0]Bootmodeconfigurationbits
Showsthestatusofwhatdevicebootmodeconfigurationisoperational.
BOOTMODE[3:0]
[Note:ifselectedforboot,thecorrespondingperipheralisautomaticallyenabledafterdevicereset.]
0000Noboot(defaultmode)
0001Hostboot(HPI)
0010Reserved
0011Reserved
0100EMIFA8bitROMboot
0101MasterI2Cboot
0110SlaveI2Cboot
0111Hostboot(PCI)
1000SerialRapidI/ObootFormoredetailedinformationonthebootmodes,seeSection2.4,Boot
thruSequence,ofthisdocument.
1111
TheJTAGIDregisterisaread-onlyregisterthatidentifiestothecustomertheJTAG/DeviceID.Forthe
C6455device,theJTAGIDregisterresidesataddresslocation0x02A80008.Fortheactualregisterbit
namesandtheirassociatedbitfielddescriptions,seeFigure3-11andTable3-14.
312827121110
VARIANTPARTNUMBERMANUFACTURER
LSB
(4bit)(16bit)(11bit)
R-nR-0000000010001010b00000010111bR-1
LEGEND:R=Readonly;-n=valueafterreset
Figure3-11.JTAGID(JTAGID)Register-0x02A80008
Table3-14.JTAGID(JTAGID)RegisterFieldDescriptions
BitFieldValueDescription
31:28VARIANTVariant(4Bit)value.Thevalueofthisfielddependsonthesiliconrevisionbeing
used.Formoreinformation,seetheTMS320C6455DigitalSignalProcessor
SiliconErrata(literaturenumberSPRZ234).
Note:theVARIANTfieldmaybeinvalidifnoCLKIN1signalisapplied.
27:12PARTNUMBERPartNumber(16Bit)value.C6455value:0000000010001010b.
11:1MANUFACTURERManufacturer(11Bit)value.C6455value:00000010111b.
0LSBLSB.Thisbitisreadasa"1"forC6455.
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