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STM32F429NET6 데이터시트(PDF) 170 Page - STMicroelectronics |
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STM32F429NET6 데이터시트(HTML) 170 Page - STMicroelectronics |
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170 / 231 page ![]() Electrical characteristics STM32F427xx STM32F429xx 170/231 DocID024030 Rev 6 Synchronous waveforms and timings Figure 59 through Figure 62 represent synchronous waveforms and Table 94 through Table 97 provide the corresponding timings. The results shown in these tables are obtained with the following FMC configuration: • BurstAccessMode = FMC_BurstAccessMode_Enable; • MemoryType = FMC_MemoryType_CRAM; • WriteBurst = FMC_WriteBurst_Enable; • CLKDivision = 1; (0 is not supported, see the STM32F4xx reference manual : RM0090) • DataLatency = 1 for NOR Flash; DataLatency = 0 for PSRAM In all timing tables, the THCLK is the HCLK clock period (with maximum FMC_CLK = 90 MHz). 1. CL = 30 pF. 2. Guaranteed by characterization results. Table 93. Asynchronous multiplexed 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 9THCLK 9THCLK+0.5 ns tw(NWE) FMC_NWE low time 7THCLK 7THCLK+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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