Texas-instruments TMS320C6712D Bedienungsanleitung PDF herunterladen (Seite 69)

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SPRS293A − OCTOBER 2005 − REVISED NOVEMBER 2005

POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443

INPUT AND OUTPUT CLOCKS (CONTINUED)

switching characteristics over recommended operating conditions for ECLKOUT

†‡§

(see Figure 25)

NO.

PARAMETER

−150

UNIT

NO.

PARAMETER

MIN MAX

UNIT

1 t

c(EKO)

Cycle time, ECLKOUT E − 0.9 E + 0.9 ns

2 t

w(EKOH)

Pulse duration, ECLKOUT high EH − 0.9 EH + 0.9 ns

3 t

w(EKOL)

Pulse duration, ECLKOUT low EL − 0.9 EL + 0.9 ns

4 t

t(EKO)

Transition time, ECLKOUT 2 ns

5 t

d(EKIH-EKOH)

Delay time, ECLKIN high to ECLKOUT high 1 6.5 ns

6 t

d(EKIL-EKOL)

Delay time, ECLKIN low to ECLKOUT low 1 6.5 ns

†

The reference points for the rise and fall transitions are measured at V

MAX and V

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.

ECLKINECLKIN

ECLKOUT

Figure 25. ECLKOUT Timings

1 2 ... 64 65 66 67 68 69 70 71 72 73 74 ... 101 102

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