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STM32F479AI Datasheet(PDF) 180 Page - STMicroelectronics |
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STM32F479AI Datasheet(HTML) 180 Page - STMicroelectronics |
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180 / 208 page ![]() Electrical characteristics STM32F479xx 180/208 DocID028010 Rev 2 Table 105. SDRAM write 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 td(SDCLKL _Data) Data output valid time - 2.5 th(SDCLKL _Data) Data output hold time 3.5 - td(SDCLKL_Add) Address valid time - 1.5 td(SDCLKL_SDNWE) SDNWE valid time - 1 th(SDCLKL_SDNWE) SDNWE hold time 0 - td(SDCLKL_ SDNE) Chip select valid time - 0.5 th(SDCLKL-_SDNE) Chip select hold time 0 - td(SDCLKL_SDNRAS) SDNRAS valid time - 2 th(SDCLKL_SDNRAS) SDNRAS hold time 0 - td(SDCLKL_SDNCAS) SDNCAS valid time - 0.5 td(SDCLKL_SDNCAS) SDNCAS hold time 0 - td(SDCLKL_NBL) NBL valid time - 0.5 th(SDCLKL_NBL) NBL output time 0 - Table 106. LPSDR SDRAM write 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 td(SDCLKL _Data) Data output valid time - 5 th(SDCLKL _Data) Data output hold time 2 - td(SDCLKL_Add) Address valid time - 2.8 td(SDCLKL-SDNWE) SDNWE valid time - 2 th(SDCLKL-SDNWE) SDNWE hold time 1 - td(SDCLKL- SDNE) Chip select valid time - 1.5 th(SDCLKL- SDNE) Chip select hold time 1 - td(SDCLKL-SDNRAS) SDNRAS valid time - 1.5 th(SDCLKL-SDNRAS) SDNRAS hold time 1.5 - td(SDCLKL-SDNCAS) SDNCAS valid time - 1.5 td(SDCLKL-SDNCAS) SDNCAS hold time 1.5 - td(SDCLKL_NBL) NBL valid time - 1.5 th(SDCLKL-NBL) NBL output time 1.5 - |
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