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LA-LATTICEXP2 데이터시트(PDF) 11 Page - Lattice Semiconductor |
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LA-LATTICEXP2 데이터시트(HTML) 11 Page - Lattice Semiconductor |
11 / 83 page 2-8 Architecture Lattice Semiconductor LA-LatticeXP2 Family Data Sheet Figure 2-5. Clock Divider Connections Clock Distribution Network LA-LatticeXP2 devices have eight quadrant-based primary clocks and between six and eight flexible region-based secondary clocks/control signals. Two high performance edge clocks are available on each edge of the device to support high speed interfaces. The clock inputs are selected from external I/Os, the sysCLOCK PLLs, or routing. Clock inputs are fed throughout the chip via the primary, secondary and edge clock networks. Primary Clock Sources LA-LatticeXP2 devices derive primary clocks from four sources: PLL outputs, CLKDIV outputs, dedicated clock inputs and routing. LA-LatticeXP2 devices have two to four sysCLOCK PLLs, located in the four corners of the device. There are eight dedicated clock inputs, two on each side of the device. Figure 2-6 shows the primary clock sources. RST RELEASE ÷1 ÷2 ÷4 ÷8 CLKOP (GPLL) ECLK CLKDIV |
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