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APR9/D 数据表(PDF) 24 Page - NXP Semiconductors |
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APR9/D 数据表(HTML) 24 Page - NXP Semiconductors |
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24 / 101 page ![]() 2-6 DSP56001A/D, Rev. 1 MOTOROLA DSP56001A External Clock (EXTAL Pin) Figure 2-3 External Clock Timing Table 2-7 Clock Operation No Characteristics Symbol 27 MHz 33 MHz Unit Min Max Min Max Frequency of Operation (EXTAL Pin) Ef 4 27 4 33 MHz 1 Clock Input High (46.7% – 53.3% duty cycle) ETH 17 150 13.5 150 ns 2 Clock Input Low (46.7% – 53.3% duty cycle) ETL 17 150 13.5 150 ns 3 Clock Cycle Time ETC 37 250 30 250 ns 4 Instruction Cycle Time = ICYC = 2 × TC ICYC 74 500 60 500 ns Note: External Clock Input High and External Clock Input Low are reserved at 50% of the input transition. EXTAL VILC VIHC Midpoint NOTE: The midpoint is VILC + 0.5 (VIHC – VILC). ETH ETL ETC 1 2 3 4 AA0360 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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