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AX2000 Datasheet(PDF) 80 Page - Microsemi Corporation |
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AX2000 Datasheet(HTML) 80 Page - Microsemi Corporation |
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80 / 262 page  Detailed Specifications 2- 66 R e v i sio n 1 8 Global Resources One of the most important aspects of any FPGA architecture is its global resources or clocks. The Axcelerator family provides the user with flexible and easy-to-use global resources, without the limitations normally found in other FPGA architectures. The AX architecture contains two types of global resources, the HCLK (hardwired clock) and CLK (routed clock). Every Axcelerator device is provided with four HCLKs and four CLKs for a total of eight clocks, regardless of device density. Hardwired Clocks The hardwired (HCLK) is a low-skew network that can directly drive the clock inputs of all sequential modules (R-cells, I/O registers, and embedded RAM/FIFOs) in the device with no antifuse in the path. All four HCLKs are available everywhere on the chip. Timing Characteristics Table 2-70 • AX125 Dedicated (Hardwired) Array Clock Networks Worst-Case Commercial Conditions VCCA = 1.425 V, VCCI = 3.0 V, TJ = 70°C –2 Speed –1 Speed Std Speed Units Parameter Description Min. Max. Min. Max. Min. Max. Dedicated (Hardwired) Array Clock Networks tHCKL Input Low to High 3.02 3.44 4.05 ns tHCKH Input High to Low 3.03 3.46 4.06 ns tHPWH Minimum Pulse Width High 0.58 0.65 0.77 ns tHPWL Minimum Pulse Width Low 0.52 0.59 0.69 ns tHCKSW Maximum Skew 0.06 0.07 0.08 ns tHP Minimum Period 1.15 1.31 1.54 ns tHMAX Maximum Frequency 870 763 649 MHz Table 2-71 • AX250 Dedicated (Hardwired) Array Clock Networks Worst-Case Commercial Conditions VCCA = 1.425 V, VCCI = 3.0 V, TJ = 70°C –2 Speed –1 Speed Std Speed Units Parameter Description Min.Max.Min.Max.Min.Max. Dedicated (Hardwired) Array Clock Networks tHCKL Input Low to High 2.57 2.93 3.45 ns tHCKH Input High to Low 2.61 2.97 3.50 ns tHPWH Minimum Pulse Width High 0.58 0.65 0.77 ns tHPWL Minimum Pulse Width Low 0.52 0.59 0.69 ns tHCKSW Maximum Skew 0.06 0.07 0.08 ns tHP Minimum Period 1.15 1.31 1.54 ns tHMAX Maximum Frequency 870 763 649 MHz |
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