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5.18.1JTAGTest-PortElectricalData/Timing
RTCK
TDO
TDI
4
5
TMS
6
7
TCK
1
2
3
TMS320DM355
DigitalMediaSystem-on-Chip(DMSoC)
SPRS463A–SEPTEMBER2007–REVISEDSEPTEMBER2007
Table5-48.TimingRequirementsforJTAGTestPort(seeFigure5-51)
DM355
NO.UNIT
MINMAX
1t
c(TCK)
Cycletime,TCK20ns
2tw(TCKH)Pulseduration,TCKhigh8ns
3tw(TCKL)Pulseduration,TCKlow8ns
4t
su(TDIV-RTCKH)
Setuptime,TDIvalidbeforeRTCKhigh10ns
5t
h(RTCKH-TDIIV)
Holdtime,TDIvalidafterRTCKhigh9ns
6t
su(TMSV-RTCKH)
Setuptime,TMSvalidbeforeRTCKhigh2ns
7t
h(RTCKH-TMSIV)
Holdtime,TMSvalidafterRTCKhigh5ns
Figure5-51.JTAGInputTiming
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