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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32H747AI датащи(PDF) 167 Page - STMicroelectronics |
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STM32H747AI датащи(HTML) 167 Page - STMicroelectronics |
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167 / 252 page  DS12930 Rev 1 157/242 STM32H747xI/G Electrical characteristics 221 Table 79. Asynchronous non-multiplexed SRAM/PSRAM/NOR write timings(1) 1. Guaranteed by characterization results. Symbol Parameter Min Max Unit tw(NE) FMC_NE low time 3Tfmc_ker_ck –1 3Tfmc_ker_ck ns tv(NWE_NE) FMC_NEx low to FMC_NWE low Tfmc_ker_ck Tfmc_ker_ck+1 tw(NWE) FMC_NWE low time Tfmc_ker_ck –0.5 Tfmc_ker_ck+0.5 th(NE_NWE) FMC_NWE high to FMC_NE high hold time Tfmc_ker_ck - tv(A_NE) FMC_NEx low to FMC_A valid - 2 th(A_NWE) Address hold time after FMC_NWE high Tfmc_ker_ck –0.5 - tv(BL_NE) FMC_NEx low to FMC_BL valid - 0.5 th(BL_NWE) FMC_BL hold time after FMC_NWE high Tfmc_ker_ck –0.5 - tv(Data_NE) Data to FMC_NEx low to Data valid - Tfmc_ker_ck+ 2.5 th(Data_NWE) Data hold time after FMC_NWE high Tfmc_ker_ck+0.5 - tv(NADV_NE) FMC_NEx low to FMC_NADV low - 0 tw(NADV) FMC_NADV low time - Tfmc_ker_ck+ 1 Table 80. Asynchronous non-multiplexed SRAM/PSRAM/NOR write-NWAIT timings(1)(2) 1. Guaranteed by characterization results. 2. NWAIT pulse width is equal to 1 AHB cycle. Symbol Parameter Min Max Unit tw(NE) FMC_NE low time 8Tfmc_ker_ck –1 8Tfmc_ker_ck+1 ns tw(NWE) FMC_NWE low time 6Tfmc_ker_ck –1.5 6Tfmc_ker_ck+0.5 tsu(NWAIT_NE) FMC_NWAIT valid before FMC_NEx high 5Tfmc_ker_ck+13 - th(NE_NWAIT) FMC_NEx hold time after FMC_NWAIT invalid 4Tfmc_ker_ck+13 - |
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