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STM32F217VG 数据表(PDF) 131 Page - STMicroelectronics |
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STM32F217VG 数据表(HTML) 131 Page - STMicroelectronics |
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131 / 175 page  DocID17050 Rev 9 131/175 STM32F21xxx Electrical characteristics 174 Figure 56. Asynchronous multiplexed PSRAM/NOR read waveforms 1. CL = 30 pF. 2. Based on characterization, not tested in production. Table 73. Asynchronous multiplexed PSRAM/NOR read timings(1)(2) Symbol Parameter Min Max Unit tw(NE) FSMC_NE low time 3THCLK-1 3THCLK+1 ns tv(NOE_NE) FSMC_NEx low to FSMC_NOE low 2THCLK 2THCLK+0.5 ns tw(NOE) FSMC_NOE low time THCLK-1 THCLK+1 ns th(NE_NOE) FSMC_NOE high to FSMC_NE high hold time 0 - ns tv(A_NE) FSMC_NEx low to FSMC_A valid - 2 ns tv(NADV_NE) FSMC_NEx low to FSMC_NADV low 1 2.5 ns tw(NADV) FSMC_NADV low time THCLK– 1.5 THCLK ns th(AD_NADV) FSMC_AD(adress) valid hold time after FSMC_NADV high) THCLK -ns th(A_NOE) Address hold time after FSMC_NOE high THCLK -ns th(BL_NOE) FSMC_BL time after FSMC_NOE high 0 - ns tv(BL_NE) FSMC_NEx low to FSMC_BL valid - 1 ns tsu(Data_NE) Data to FSMC_NEx high setup time THCLK+ 2 - ns NBL Data FSMC_NBL[1:0] FSMC_AD[15:0] tv(BL_NE) th(Data_NE) Address FSMC_A[25:16] tv(A_NE) FSMC_NWE t v(A_NE) ai14892b Address FSMC_NADV t v(NADV_NE) tw(NADV) tsu(Data_NE) th(AD_NADV) FSMC_NE FSMC_NOE tw(NE) t w(NOE) tv(NOE_NE) t h(NE_NOE) th(A_NOE) th(BL_NOE) tsu(Data_NOE) th(Data_NOE) |
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