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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DSP56321 датащи(PDF) 26 Page - Freescale Semiconductor, Inc |
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DSP56321 датащи(HTML) 26 Page - Freescale Semiconductor, Inc |
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26 / 84 page  DSP56321 Technical Data, Rev. 11 2-6 Freescale Semiconductor Specifications 2.4.4 Reset, Stop, Mode Select, and Interrupt Timing Notes: 1. Refer to the DSP56321 User’s Manual for a detailed description of register reset values. 2. The total multiplication factor (MF) includes both integer and fractional parts (that is, MF = MFI + MFN/MFD). 3. The numerator (MFN) should be less than the denominator (MFD). 4. DPLL lock procedure duration is specified for the case when an external clock source is supplied to the EXTAL pin. 5. Frequency-only Lock Mode or non-integer MF, after partial reset. 6. Frequency and Phase Lock Mode, integer MF, after full reset. Table 2-7. Reset, Stop, Mode Select, and Interrupt Timing5 No. Characteristics Expression 200 MHz 220 MHz 240 MHz 275 MHz Unit Min Max Min Max Min Max Min Max 8 Delay from RESET assertion to all pins at reset value 3 —— 26 — 26 — 26 — 26 ns 9 Required RESET duration4 • Power on, external clock generator, DPLL disabled • Power on, external clock generator, DPLL enabled • Power on, internal oscillator • During STOP, XTAL disabled • During STOP, XTAL enabled • During normal operation 50 × ETC 1000 × ET C 75000 × ETC 75000 × ET C 2.5 × TC 2.5 × TC 250.0 5.0 0.375 0.375 12.5 17 — — — — — — 227.5 4.55 0.341 0.341 11.38 16 — — — — — — 208.5 4.17 0.313 0.313 10.43 15 — — — — — — 182.0 3.64 0.273 0.273 9.1 9.1 — — — — — — ns µs ms ms ns ns 10 Delay from asynchronous RESET deassertion to first external address output (internal reset deassertion) • Minimum •Maximum 3.25 × T C + 2.0 18.25 — — 180 16.77 — — 163 15.55 — — 150 13.82 — — 140 ns ns 13 Mode select setup time 30.0 — 30.0 — 30.0 — 30.0 — ns 14 Mode select hold time 0.0 — 0.0 — 0.0 — 0.0 — ns 15 Minimum edge-triggered interrupt request assertion width 4.0 — 4.0 — 4.0 — 4.0 — ns 16 Minimum edge-triggered interrupt request deassertion width 4.0 — 4.0 — 4.0 — 4.0 — ns 17 Delay from IRQA, IRQB, IRQC, IRQD, NMI assertion to external memory access address out valid • Caused by first interrupt instruction fetch • Caused by first interrupt instruction execution 4.25 × TC + 2.0 7.25 × TC + 2.0 23.25 38.25 — — 21.24 34.99 — — 19.72 32.23 — — 17.45 28.36 — — ns ns 18 Delay from IRQA, IRQB, IRQC, IRQD, NMI assertion to general-purpose transfer output valid caused by first interrupt instruction execution 8.9 × T C 44.5 — 40.45 — 37.0 — 32.37 — ns 19 Delay from address output valid caused by first interrupt instruction execute to interrupt request deassertion for level sensitive fast interrupts 1, 6, 7 (WS + 3.75) × TC – 10.94 — Note 7 — Note 7 — Note 7 — Note 7 ns Table 2-6. CLKGEN and DPLL Characteristics (Continued) Characteristics Symbol 200 MHz 220 MHz 240 MHz 275 MHz Unit Min Max Min Max Min Max Min Max |
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