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STM32F479AI 数据表(PDF) 179 Page - STMicroelectronics |
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STM32F479AI 数据表(HTML) 179 Page - STMicroelectronics |
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179 / 208 page ![]() DocID028010 Rev 2 179/208 STM32F479xx Electrical characteristics 187 Figure 70. SDRAM write access waveforms Table 104. LPSDR SDRAM read timings(1) 1. Guaranteed based on test during characterization. Symbol Parameter Min Max Unit tW(SDCLK) FMC_SDCLK period 2THCLK − 0.5 2THCLK+0.5 ns tsu(SDCLKH_Data) Data input setup time 2.5 - th(SDCLKH_Data) Data input hold time 0 - td(SDCLKL_Add) Address valid time - 1 td(SDCLKL_SDNE) Chip select valid time - 1 th(SDCLKL_SDNE) Chip select hold time 1 - td(SDCLKL_SDNRAS SDNRAS valid time - 1 th(SDCLKL_SDNRAS) SDNRAS hold time 1 - td(SDCLKL_SDNCAS) SDNCAS valid time - 1 th(SDCLKL_SDNCAS) SDNCAS hold time 1 - |
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