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5.5.3ClockPLLElectricalData/Timing(InputandOutputClocks)
MXI/CLKIN
2
3
4
4
5
1
MXI/CLKIN
2
3
4
4
5
1
TMS320DM355
DigitalMediaSystem-on-Chip(DMSoC)
SPRS463A–SEPTEMBER2007–REVISEDSEPTEMBER2007
Table5-5.TimingRequirementsforMXI1/CLKIN1
(1)(2)
(seeFigure5-7)
DM355
NO
UNIT
.
MINTYPMAX
1t
c(MXI1)
Cycletime,MXI1/CLKIN127.7
(3)
41.6
(3)
ns
2t
w(MXI1H)
Pulseduration,MXI1/CLKIN1high0.45C0.55Cns
3t
w(MXI1L)
Pulseduration,MXI1/CLKIN1low0.45C0.55Cns
4t
t(MXI1)
Transitiontime,MXI1/CLKIN10.05Cns
5t
J(MXI1)
Periodjitter,MXI1/CLKIN10.02Cns
(1)ThereferencepointsfortheriseandfalltransitionsaremeasuredatV
IL
MAXandV
IH
MIN.
(2)C=MXI1/CLKIN1cycletimeinns.Forexample,whenMXI1/CLKIN1frequencyis24MHzuseC=41.6ns.
(3)tc(MXI1)=41.6nsandtc(MXI1)=27.7nsaretheonlysupportedcycletimesforMXI1/CLKIN1.
Figure5-7.MXI1/CLKIN1Timing
Table5-6.TimingRequirementsforMXI2/CLKIN2
(1)(2)
(seeFigure5-7)
NO.DM355UNIT
MINTYPMAX
1t
c(MXI2)
Cycletime,MXI2/CLKIN237.037
(3)
37.037
(3)
ns
2t
w(MXI2H)
Pulseduration,MXI2/CLKIN2high0.45C0.55Cns
3t
w(MXI2L)
Pulseduration,MXI2/CLKIN2low0.45C0.55Cns
4t
t(MXI2)
Transitiontime,MXI2/CLKIN20.05Cns
5t
J(MXI2)
Periodjitter,MXI2/CLKIN20.02Cns
(1)ThereferencepointsfortheriseandfalltransitionsaremeasuredatV
IL
MAXandV
IH
MIN.
(2)C=MXI2/CLKIN2cycletimeinns.Forexample,whenMXI2/CLKIN2frequencyis27MHzuseC=37.037ns.
(3)tc(MXI2)=37.037nsistheonlysupportedcycletimeforMXI2/CLKIN2.
Figure5-8.MXI2/CLKIN2Timing
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