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TMS320VC5402 датащи(PDF) 52 Page - Texas Instruments |
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TMS320VC5402 датащи(HTML) 52 Page - Texas Instruments |
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52 / 68 page ![]() TMS320VC5402 FIXEDPOINT DIGITAL SIGNAL PROCESSOR SPRS079E – OCTOBER 1998 – REVISED AUGUST 2000 52 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443 instruction acquisition (IAQ), interrupt acknowledge (IACK), external flag (XF), and TOUT timings switching characteristics over recommended operating conditions for IAQ and IACK [H = 0.5 tc(CO)] (see Figure 25) PARAMETER MIN MAX UNIT td(CLKL-IAQL) Delay time, CLKOUT low to IAQ low –1 3 ns td(CLKL-IAQH) Delay time, CLKOUT low to IAQ high –1 3 ns td(A)IAQ Delay time, address valid to IAQ low 1 ns td(CLKL-IACKL) Delay time, CLKOUT low to IACK low –1 3 ns td(CLKL-IACKH) Delay time , CLKOUT low to IACK high –1 3 ns td(A)IACK Delay time, address valid to IACK low 3 ns th(A)IAQ Hold time, IAQ high after address invalid –2 ns th(A)IACK Hold time, IACK high after address invalid –2 ns tw(IAQL) Pulse duration, IAQ low 2H–2 ns tw(IACKL) Pulse duration, IACK low 2H–2 ns MSTRB IACK IAQ A[19:0] CLKOUT td(A)IACK td(A)IAQ tw(IACKL) th(A)IACK td(CLKL-IACKL) tw(IAQL) th(A)IAQ td(CLKL-IAQL) td(CLKL-IACKH) td(CLKL-IAQH) Figure 25. IAQ and IACK Timings |
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