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STM32F427AI 数据表(PDF) 173 Page - STMicroelectronics |
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STM32F427AI 数据表(HTML) 173 Page - STMicroelectronics |
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173 / 240 page  DS9405 Rev 12 173/240 STM32F427xx STM32F429xx Electrical characteristics 197 Figure 57. Asynchronous multiplexed PSRAM/NOR read waveforms Table 90. Asynchronous non-multiplexed SRAM/PSRAM/NOR write - NWAIT timings(1)(2) 1. CL = 30 pF. 2. Evaluated by characterization. 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 NBL Data FMC_ NBL[1:0] FMC_ AD[15:0] tv(BL_NE) th(Data_NE) Address FMC_ A[25:16] tv(A_NE) FMC_NWE t v(A_NE) MS32755V1 Address FMC_NADV t v(NADV_NE) tw(NADV) tsu(Data_NE) th(AD_NADV) FMC_ NE FMC_NOE tw(NE) tw(NOE) tv(NOE_NE) t h(NE_NOE) th(A_NOE) th(BL_NOE) tsu(Data_NOE) th(Data_NOE) FMC_NWAIT tsu(NWAIT_NE) th(NE_NWAIT) |
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