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TMS320C6711D
FLOATING POINT DIGITAL SIGNAL PROCESSOR
SPRS292A − OCTOBER 2005 − REVISED NOVEMBER 2005
timing requirements for ECLKIN
NO.
1
t c(EKI)
Cycle time, ECLKIN
2
t w(EKIH)
Pulse duration, ECLKIN high
3
t w(EKIL)
Pulse duration, ECLKIN low
4
t t(EKI)
Transition time, ECLKIN
† The reference points for the rise and fall transitions are measured at V IL MAX and V IH MIN.
ECLKIN
switching characteristics over recommended operating conditions for ECLKOUT
(see Figure 26)
NO.
1
t c(EKO)
Cycle time, ECLKOUT
2
t w(EKOH)
Pulse duration, ECLKOUT high
3
t w(EKOL)
Pulse duration, ECLKOUT low
4
t t(EKO)
Transition time, ECLKOUT
5
t d(EKIH-EKOH) Delay time, ECLKIN high to ECLKOUT high
6
t d(EKIL-EKOL) Delay time, ECLKIN low to ECLKOUT low
‡ The reference points for the rise and fall transitions are measured at V OL MAX and V OH MIN.
§ E = ECLKIN period in ns
¶ EH is the high period of ECLKIN in ns and EL is the low period of ECLKIN in ns.
ECLKIN
ECLKIN
ECLKOUT
70
INPUT AND OUTPUT CLOCKS (CONTINUED)
†
(see Figure 25)
Figure 25. ECLKIN Timings
PARAMETER
6
5
Figure 26. ECLKOUT Timings
•
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251−1443
1
4
2
3
1
4
2
3
GDPA-167
ZDPA−167
−200
UNIT
−250
MIN
MAX
10
ns
4.5
ns
4.5
ns
3
ns
4
द
GDPA-167
ZDPA−167
−200
UNIT
−250
MIN
MAX
E − 0.9
E + 0.9
ns
EH − 0.9
EH + 0.9
ns
EL − 0.9
EL + 0.9
ns
2
ns
1
6.5
ns
1
6.5
ns
4
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