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AGL1000V2-FGG144I Datasheet(PDF) 30 Page - Actel Corporation |
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AGL1000V2-FGG144I Datasheet(HTML) 30 Page - Actel Corporation |
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30 / 212 page  IGLOO DC and Switching Characteristics 2- 16 Advance v0.5 Power Calculation Methodology This section describes a simplified method to estimate power consumption of an application. For more accurate and detailed power estimations, use the SmartPower tool in Actel Libero IDE software. The power calculation methodology described below uses the following variables: • The number of PLLs as well as the number and the frequency of each output clock generated • The number of combinatorial and sequential cells used in the design •The internal clock frequencies • The number and the standard of I/O pins used in the design • The number of RAM blocks used in the design • Toggle rates of I/O pins as well as VersaTiles—guidelines are provided in Table 2-22 on page 2-18. • Enable rates of output buffers—guidelines are provided for typical applications in Table 2-23 on page 2-18. • Read rate and write rate to the memory—guidelines are provided for typical applications in Table 2-23 on page 2-18. The calculation should be repeated for each clock domain defined in the design. Methodology Total Power Consumption—PTOTAL PTOTAL = PSTAT + PDYN PSTAT is the total static power consumption. PDYN is the total dynamic power consumption. Total Static Power Consumption—PSTAT PSTAT = (PDC1 or PDC2 or PDC3) + NBANKS * PDC5 + NINPUTS * PDC6 + NOUTPUTS * PDC7 NINPUTS is the number of I/O input buffers used in the design. NOUTPUTS is the number of I/O output buffers used in the design. NBANKS is the number of I/O banks powered in the design. Total Dynamic Power Consumption—PDYN PDYN = PCLOCK + PS-CELL + PC-CELL + PNET + PINPUTS + POUTPUTS + PMEMORY + PPLL Global Clock Contribution—PCLOCK PCLOCK = (PAC1 + NSPINE* PAC2 + NROW * PAC3 + NS-CELL* PAC4) * FCLK NSPINE is the number of global spines used in the user design—guidelines are provided in Table 2-22 on page 2-18. NROW is the number of VersaTile rows used in the design—guidelines are provided in Table 2-22 on page 2-18. FCLK is the global clock signal frequency. NS-CELL is the number of VersaTiles used as sequential modules in the design. PAC1, PAC2, PAC3, and PAC4 are device-dependent. Sequential Cells Contribution—PS-CELL PS-CELL = NS-CELL * (PAC5 + α 1 / 2 * PAC6) * FCLK NS-CELL is the number of VersaTiles used as sequential modules in the design. When a multi-tile sequential cell is used, it should be accounted for as 1. α 1 is the toggle rate of VersaTile outputs—guidelines are provided in Table 2-22 on page 2-18. FCLK is the global clock signal frequency. |
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