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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) 169 Page - STMicroelectronics |
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STM32H747AI датащи(HTML) 169 Page - STMicroelectronics |
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169 / 252 page  DS12930 Rev 1 159/242 STM32H747xI/G Electrical characteristics 221 Table 81. Asynchronous multiplexed PSRAM/NOR read timings(1) 1. Guaranteed by characterization results. Symbol Parameter Min Max Unit tw(NE) FMC_NE low time 4Tfmc_ker_ck –1 4Tfmc_ker_ck +1 ns tv(NOE_NE) FMC_NEx low to FMC_NOE low 2Tfmc_ker_ck 2Tfmc_ker_ck +0.5 ttw(NOE) FMC_NOE low time Tfmc_ker_ck –1 Tfmc_ker_ck +1 th(NE_NOE) FMC_NOE high to FMC_NE high hold time 0 - tv(A_NE) FMC_NEx low to FMC_A valid - 0.5 tv(NADV_NE) FMC_NEx low to FMC_NADV low 0 0.5 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_NOE) Address hold time after FMC_NOE high Tfmc_ker_ck –0.5 - tsu(Data_NE) Data to FMC_NEx high setup time 11 - tsu(Data_NOE) Data to FMC_NOE high setup time 11 - th(Data_NE) Data hold time after FMC_NEx high 0 - th(Data_NOE) Data hold time after FMC_NOE high 0 - Table 82. Asynchronous multiplexed PSRAM/NOR read-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 ns tw(NOE) FMC_NWE low time 5Tfmc_ker_ck –1.5 5Tfmc_ker_ck +0.5 tsu(NWAIT_NE) FMC_NWAIT valid before FMC_NEx high 4Tfmc_ker_ck +11 - th(NE_NWAIT) FMC_NEx hold time after FMC_NWAIT invalid 3Tfmc_ker_ck +11.5 - |
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