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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MNSC140CORE датащи(PDF) 77 Page - Freescale Semiconductor, Inc |
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MNSC140CORE датащи(HTML) 77 Page - Freescale Semiconductor, Inc |
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77 / 80 page  Power Considerations MSC8102 Quad Core Digital Signal Processor, Rev. 12 Freescale Semiconductor 4-5 4.4 Power Considerations The internal power dissipation consists of three components: PINT = PTCORE + PSIU + PBUSES + PPERIPH The power dissipation depends on the operating frequency of the different portions of the chip. To determine the power dissipation at a given frequency, the following equations should be applied: PCORE (fc) = ((PCORE – PLCO)/275) × fc + PLCO PTCORE (fc) = (PCORE × 4) PSIU (fc) = ((PSIU – PLSI)/91.67) × fc + PLSI PPERIPH (fc) = ((PPERIPH – PLPE)/91.67) × fc + PLPE PBUSES (fc) = PBUSES /91.67 × fc Where, fc is the operating frequency in MHz and all power numbers are in mW PLCO is the SC140 Core leakage power PLSI is the SIU leakage power PLPE is the peripheral leakage power To determine a total power dissipation in a specific application, the following equation should be applied for each I/O output pin: P = C × VDDH2 × fs × 10–3 Equation 1 Where: P = power in mW C = load capacitance in pF fs = output switching frequency in MHz. |
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