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STM32H753II датащи(PDF) 151 Page - STMicroelectronics |
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STM32H753II датащи(HTML) 151 Page - STMicroelectronics |
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151 / 361 page ![]() DS12117 Rev 8 151/360 STM32H753xI Electrical characteristics (rev Y) 318 Synchronous waveforms and timings Figure 27 through Figure 30 represent synchronous waveforms and Table 73 through Table 76 provide the corresponding timings. The results shown in these tables are obtained with the following FMC configuration: • BurstAccessMode = FMC_BurstAccessMode_Enable • MemoryType = FMC_MemoryType_CRAM • WriteBurst = FMC_WriteBurst_Enable • CLKDivision = 1 • DataLatency = 1 for NOR Flash; DataLatency = 0 for PSRAM In all the timing tables, the Tfmc_ker_ck is the fmc_ker_ck clock period, with the following FMC_CLK maximum values: • For 2.7 V<VDD<3.6 V, FMC_CLK =100 MHz at 20 pF • For 1.8 V<VDD<1.9 V, FMC_CLK =100 MHz at 20 pF • For 1.62 V<VDD<1.8 V, FMC_CLK =100 MHz at 15 pF Table 72. Asynchronous multiplexed PSRAM/NOR write-NWAIT timings(1) Symbol Parameter Min Max Unit tw(NE) FMC_NE low time 9Tfmc_ker_ck – 1 9Tfmc_ker_ck ns tw(NWE) FMC_NWE low time 7Tfmc_ker_ck – 0.5 7Tfmc_ker_ck + 0.5 tsu(NWAIT_NE) FMC_NWAIT valid before FMC_NEx high 6Tfmc_ker_ck + 3 - th(NE_NWAIT) FMC_NEx hold time after FMC_NWAIT invalid 4Tfmc_ker_ck - 1. Guaranteed by characterization results. |
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