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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32MP151F датащи(PDF) 177 Page - STMicroelectronics |
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STM32MP151F датащи(HTML) 177 Page - STMicroelectronics |
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177 / 253 page  DS12501 Rev 3 177/253 STM32MP151C/F Electrical characteristics 232 Synchronous waveforms and timings Figure 29 through Figure 32 represent synchronous waveforms and Table 65 through Table 68 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 Table 63. Asynchronous multiplexed PSRAM/NOR write timings(1) Symbol Parameter Min Max Unit tw(NE) FMC_NE low time 5Tfmc_ker_ck-0.5 5Tfmc_ker_ck+1 ns tv(NWE_NE) FMC_NEx low to FMC_NWE low Tfmc_ker_ck-0.5 Tfmc_ker_ck+1 tw(NWE) FMC_NWE low time 2Tfmc_ker_ck-1 2Tfmc_ker_ck+0.5 th(NE_NWE) FMC_NWE high to FMC_NE high hold time 2Tfmc_ker_ck-0.5 - tv(A_NE) FMC_NEx low to FMC_A valid - 0.5 tv(NADV_NE) FMC_NEx low to FMC_NADV low 0 1 tw(NADV) FMC_NADV low time Tfmc_ker_ck+0.5 Tfmc_ker_ck+1 th(AD_NADV) FMC_AD(address) valid hold time after FMC_NADV high Tfmc_ker_ck+0.5 - th(A_NWE) Address hold time after FMC_NWE high Address held until next write operation - th(BL_NWE) FMC_BL hold time after FMC_NWE high 3Tfmc_ker_ck+0.5 - tv(BL_NE) FMC_NEx low to FMC_BL valid - 0.5 tv(Data_NADV) FMC_NADV high to Data valid - Tfmc_ker_ck+4 th(Data_NWE) Data hold time after FMC_NWE high 3Tfmc_ker_ck+0.5 - 1. Guaranteed by characterization results. Table 64. Asynchronous multiplexed PSRAM/NOR write-NWAIT timings(1) Symbol Parameter Min Max Unit tw(NE) FMC_NE low time 9Tfmc_ker_ck-0.5 9Tfmc_ker_ck+0.5 ns tw(NWE) FMC_NWE low time 6Tfmc_ker_ck-0.5 6Tfmc_ker_ck+1 tsu(NWAIT_NE) FMC_NWAIT valid before FMC_NEx high 8Tfmc_ker_ck+4 - th(NE_NWAIT) FMC_NEx hold time after FMC_NWAIT invalid 6Tfmc_ker_ck - 1. Guaranteed by characterization results. |
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