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7.4.2EDMA3ChannelSynchronizationEvents
TMS320C6454
Fixed-PointDigitalSignalProcessor
SPRS311A–APRIL2006–REVISEDDECEMBER2006
TheEDMA3supportsupto64DMAchannelsthatcanbeusedtoservicesystemperipheralsandtomove
databetweensystemmemories.DMAchannelscanbetriggeredbysynchronizationeventsgeneratedby
systemperipherals.Table7-3liststhesourceofthesynchronizationeventassociatedwitheachofthe
DMAchannels.OntheC6454,theassociationofeachsynchronizationeventandDMAchannelisfixed
andcannotbereprogrammed.
FormoredetailedinformationontheEDMA3moduleandhowEDMA3eventsareenabled,captured,
processed,prioritized,linked,chained,andcleared,etc.,seetheTMS320C645xDSPEnhancedDMA
(EDMA)ControllerUser'sGuide(literaturenumberSPRU966).
Table7-3.C6454EDMA3ChannelSynchronizationEvents
(1)
EDMA
BINARYEVENTNAMEEVENTDESCRIPTION
CHANNEL
0
(2)
0000000DSP_EVTHPI/PCI-to-DSPevent
10000001TEVTLO0Timer0lowercounterevent
20000010TEVTHI0Timer0highcounterevent
30000011-None
40000100-None
50000101-None
60000110-None
70000111-None
80001000-None
90001001-None
100001010-None
110001011-None
120001100XEVT0McBSP0transmitevent
130001101REVT0McBSP0receiveevent
140001110XEVT1McBSP1transmitevent
150001111REVT1McBSP1receiveevent
160010000TEVTLO1Timer1lowercounterevent
170010001TEVTHI1Timer1highcounterevent
18-43--None
440101100ICREVTI2Creceiveevent
450101101ICXEVTI2Ctransmitevent
46-47--None
480110000GPINT0GPIOevent0
490110001GPINT1GPIOevent1
500110010GPINT2GPIOevent2
510110011GPINT3GPIOevent3
520110100GPINT4GPIOevent4
530110101GPINT5GPIOevent5
540110110GPINT6GPIOevent6
550110111GPINT7GPIOevent7
560111000GPINT8GPIOevent8
570111001GPINT9GPIOevent9
(1)Inadditiontotheeventsshowninthistable,eachofthe64channelscanalsobesynchronizedwiththetransfercompletionoralternate
transfercompletionevents.FormoredetailedinformationonEDMAevent-transferchaining,seetheTMS320C645xDSPEnhanced
DMA(EDMA)ControllerUser'sGuide(literaturenumberSPRU966).
(2)HPIbootandPCIbootareterminatedusingaDSPinterrupt.TheDSPinterruptisregisteredinbit0(channel0)oftheEDMAEvent
Register(ER).ThiseventmustbeclearedbysoftwarebeforetriggeringtransfersonDMAchannel0.
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