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FLEX10KE Datasheet(PDF) 39 Page - Altera Corporation |
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FLEX10KE Datasheet(HTML) 39 Page - Altera Corporation |
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39 / 100 page  Altera Corporation 39 FLEX 10KE Embedded Programmable Logic Devices Data Sheet ClockLock & ClockBoost Timing Parameters For the ClockLock and ClockBoost circuitry to function properly, the incoming clock must meet certain requirements. If these specifications are not met, the circuitry may not lock onto the incoming clock, which generates an erroneous clock within the device. The clock generated by the ClockLock and ClockBoost circuitry must also meet certain specifications. If the incoming clock meets these requirements during configuration, the ClockLock and ClockBoost circuitry will lock onto the clock during configuration. The circuit will be ready for use immediately after configuration. Figure 19 shows the incoming and generated clock specifications. Figure 19. Specifications for Incoming & Generated Clocks The tI parameter refers to the nominal input clock period; the tO parameter refers to the nominal output clock period. tR tF tCLK1 tINDUTY tI ± fCLKDEV tI tI ± tINCLKSTB tOUTDUTY tO tO + tJITTER tO – tJITTER Input Clock ClockLock- Generated Clock |
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