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AX2000-1CS896PP Datasheet(PDF) 71 Page - Actel Corporation |
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AX2000-1CS896PP Datasheet(HTML) 71 Page - Actel Corporation |
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71 / 226 page  Axcelerator Family FPGAs v2.7 2-57 Routed Clocks The routed clock (CLK) is a low-skew network that can drive the clock inputs of all sequential modules in the device (logically equivalent to the HCLK), but has the added flexibility in that it can drive the S0 (Enable), S1, PSET, and CLR input of a register (R-cells and I/O registers) as well as any of the inputs of any C-cell in the device. This allows CLKs to be used not only as clocks, but also for other global signals or high fanout nets. All four CLKs are available everywhere on the chip. Timing Characteristics Table 2-74 • AX125 Routed Array Clock Networks Worst-Case Commercial Conditions VCCA = 1.425V, VCCI = 3.0V, TJ = 70°C '–2' Speed '–1' Speed 'Std' Speed Parameter Description Min. Max. Min. Max. Min. Max. Units Routed Array Clock Networks tRCKL Input Low to High 3.08 3.50 4.12 ns tRCKH Input High to Low 3.13 3.56 4.19 ns tRPWH Minimum Pulse Width High 0.57 0.64 0.75 ns tRPWL Minimum Pulse Width Low 0.52 0.59 0.69 ns tRCKSW Maximum Skew 0.35 0.39 0.46 ns tRP Minimum Period 1.15 1.31 1.54 ns tRMAX Maximum Frequency 870 763 649 MHz Table 2-75 • AX250 Routed Array Clock Networks Worst-Case Commercial Conditions VCCA = 1.425V, VCCI = 3.0V, TJ = 70°C '–2' Speed '–1' Speed 'Std' Speed Parameter Description Min. Max. Min. Max. Min. Max. Units Routed Array Clock Networks tRCKL Input Low to High 2.52 2.87 3.37 ns tRCKH Input High to Low 2.59 2.95 3.47 ns tRPWH Minimum Pulse Width High 0.57 0.64 0.75 ns tRPWL Minimum Pulse Width Low 0.52 0.59 0.69 ns tRCKSW Maximum Skew 0.35 0.39 0.46 ns tRP Minimum Period 1.15 1.31 1.54 ns tRMAX Maximum Frequency 870 763 649 MHz |
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