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STM32F427NET7 数据表(PDF) 167 Page - STMicroelectronics |
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STM32F427NET7 数据表(HTML) 167 Page - STMicroelectronics |
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167 / 231 page ![]() DocID024030 Rev 6 167/231 STM32F427xx STM32F429xx Electrical characteristics 192 Figure 57. Asynchronous multiplexed PSRAM/NOR read waveforms Table 89. Asynchronous non-multiplexed SRAM/PSRAM/NOR write - NWAIT timings(1)(2) 1. CL = 30 pF. 2. Guaranteed by characterization results. Symbol Parameter Min Max Unit tw(NE) FMC_NE low time 8THCLK+1 8THCLK+2 ns tw(NWE) FMC_NWE low time 6THCLK − 16THCLK+2 ns tsu(NWAIT_NE) FMC_NWAIT valid before FMC_NEx high 6THCLK+1.5 - ns th(NE_NWAIT) FMC_NEx hold time after FMC_NWAIT invalid 4THCLK+1 ns |
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