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LC4128ZE7TN48C Datasheet(PDF) 23 Page - Lattice Semiconductor |
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LC4128ZE7TN48C Datasheet(HTML) 23 Page - Lattice Semiconductor |
23 / 54 page Lattice Semiconductor ispMACH 4000ZE Family Data Sheet 23 Timing Model The task of determining the timing through the ispMACH 4000ZE family, like any CPLD, is relatively simple. The timing model provided in Figure 16 shows the specific delay paths. Once the implementation of a given function is determined either conceptually or from the software report file, the delay path of the function can easily be deter- mined from the timing model. The Lattice design tools report the timing delays based on the same timing model for a particular design. Note that the internal timing parameters are given for reference only, and are not tested. The external timing parameters are tested and guaranteed for every device. For more information on the timing model and usage, please refer to technical note TN1168, ispMACH 4000ZE Timing Model Design and Usage Guidelines. Figure 16. ispMACH 4000ZE Timing Model DATA MC Reg. C.E. S/R Q SCLK IN OE In/Out Delays Oscillator/ Timer Delays In/Out Delays Control Delays Register/Latch Delays Routing/GLB Delays Out Note: Italicized items are optional delay adders. tFBK Feedback Feedback From Feedback tBUF tMCELL tPTCLK tBCLK tPTSR tBIE tBSR tGPTOE tPTOE tEXP tROUTE tOSCDIS tOSCEN tOSCOD tBLA tINREG tINDIO tIN tPGRT tIOI tGCLK_IN tIOI tPGRT tPGRT tGOE tIOI tPDi tIOO tORP tEN tDIS |
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