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TMS320VC549 датащи(PDF) 25 Page - Texas Instruments |
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TMS320VC549 датащи(HTML) 25 Page - Texas Instruments |
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25 / 63 page ![]() TMS320VC549 FIXEDPOINT DIGITAL SIGNAL PROCESSOR SPRS078G − SEPTEMBER 1998 − REVISED OCTOBER 2004 25 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 memory and parallel I/O interface timing (continued) switching characteristics over recommended operating conditions for a parallel I/O port read (IOSTRB = 0)†‡ (see Figure 7) PARAMETER 549-80 549-100 549-120 UNIT PARAMETER MIN MAX MIN MAX MIN MAX UNIT td(CLKL-A) Delay time, address valid from CLKOUT low − 1 5 − 1 4 − 1 4 ns td(CLKH-ISTRBL) Delay time, IOSTRB low from CLKOUT high 0 5 0 4 0 4 ns td(CLKH-ISTRBH) Delay time, IOSTRB high from CLKOUT high − 1 5 − 1 4 − 1 4 ns th(A)IOR Hold time, address after CLKOUT low − 1 5 − 1 4 − 1 4 ns † Address and IS timings are included in timings referenced as address. ‡ See Table 1, Table 2, and Table 3 for address bus timing variation with load capacitance. |
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