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TMS320C6711 датащи(PDF) 72 Page - Texas Instruments |
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TMS320C6711 датащи(HTML) 72 Page - Texas Instruments |
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72 / 129 page ![]() TMS320C6711, TMS320C6711B, TMS320C6711C, TMS320C6711D FLOATING-POINT DIGITAL SIGNAL PROCESSORS SPRS088L − FEBRUARY 1999 − REVISED MAY 2004 72 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 INPUT AND OUTPUT CLOCKS (CONTINUED) switching characteristics over recommended operating conditions for CLKOUT1†‡§ (see Figure 24) [C6711/11B only] NO PARAMETER –100 –150 UNIT NO. PARAMETER CLKMODE = x4 CLKMODE = x1 UNIT MIN MAX MIN MAX 1 tc(CKO1) Cycle time, CLKOUT1 P − 0.7 P + 0.7 P − 0.7 P + 0.7 ns 2 tw(CKO1H) Pulse duration, CLKOUT1 high (P/2) − 0.7 (P/2 ) + 0.7 PH − 0.7 PH + 0.7 ns 3 tw(CKO1L) Pulse duration, CLKOUT1 low (P/2) − 0.7 (P/2 ) + 0.7 PL − 0.7 PL + 0.7 ns 4 tt(CKO1) Transition time, CLKOUT1 2 2 ns † The reference points for the rise and fall transitions are measured at VOL MAX and VOH MIN. ‡ P = 1/CPU clock frequency in nanoseconds (ns) § PH is the high period of CLKIN in ns and PL is the low period of CLKIN in ns. CLKOUT1 1 3 4 4 2 Figure 24. CLKOUT1 Timings [C6711/11B Only] switching characteristics over recommended operating conditions for CLKOUT2†‡ (see Figure 25) [C6711/11B] NO. PARAMETER –100 –150 UNIT NO. PARAMETER MIN MAX UNIT 1 tc(CKO2) Cycle time, CLKOUT2 2P − 0.7 2P + 0.7 ns 2 tw(CKO2H) Pulse duration, CLKOUT2 high P − 0.7 P + 0.7 ns 3 tw(CKO2L) Pulse duration, CLKOUT2 low P − 0.7 P + 0.7 ns 4 tt(CKO2) Transition time, CLKOUT2 2 ns † The reference points for the rise and fall transitions are measured at VOL MAX and VOH MIN. ‡ P = 1/CPU clock frequency in nanoseconds (ns) CLKOUT2 1 2 3 4 4 Figure 25. CLKOUT2 Timings [C6711/11B] |
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