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TMS320VC549 датащи(PDF) 68 Page - Texas Instruments |
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TMS320VC549 датащи(HTML) 68 Page - Texas Instruments |
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68 / 111 page ![]() TMS320C54x, TMS320LC54x, TMS320VC54x FIXED-POINT DIGITAL SIGNAL PROCESSORS SPRS039C – FEBRUARY 1996 – REVISED DECEMBER 1999 68 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443 memory and parallel I/O interface timing switching characteristics over recommended operating conditions for a memory read (MSTRB = 0)†‡ (see Figure 16) PARAMETER ’LC542-40 ’LC543-40 ’C54x-40 ’LC54x-40 ’LC54x-50 ’54x-66 UNIT PARAMETER MIN MAX MIN MAX MIN MAX MIN MAX UNIT td(CLKL-A) Delay time, address valid from CLKOUT low§ 0 5 0 5 0 5 0 5 ns td(CLKH-A) Delay time, address valid from CLKOUT high (transition)¶ 0 5 0 5 0 5 – 2 3 ns td(CLKL-MSL) Delay time, MSTRB low from CLKOUT low 0 5 0 5 0 5 0 5 ns td(CLKL-MSH) Delay time, MSTRB high from CLKOUT low – 2 3 – 2 3 – 2 3 – 2 3 ns th(CLKL-A)R Hold time, address valid after CLKOUT low§ 0 5 0 5 0 5 0 5 ns th(CLKH-A)R Hold time, address valid after CLKOUT high¶ 0 5 0 5 0 5 – 2 3 ns † Address, PS, and DS timings are all included in timings referenced as address. ‡ See Table 15, Table 16, and Table 17 for address bus timing variation with load capacitance. § In the case of a memory read preceded by a memory read ¶ In the case of a memory read preceded by a memory write |
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