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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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STM32MP157C 데이터시트(PDF) 189 Page - STMicroelectronics |
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STM32MP157C 데이터시트(HTML) 189 Page - STMicroelectronics |
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189 / 258 page  DS12505 Rev 2 189/258 STM32MP157C Electrical characteristics 238 NAND controller waveforms and timings Figure 33 through Figure 36 represent synchronous waveforms, and Table 71 and Table 72 provide the corresponding timings. The results shown in this table are obtained with the following FMC configuration: • FMC_SetupTime = 0x01 • FMC_WaitSetupTime = 0x03 • FMC_HoldSetupTime = 0x02 • FMC_HiZSetupTime = 0x01 • Bank = FMC_Bank_NAND • MemoryDataWidth = FMC_MemoryDataWidth_16b • ECC = FMC_ECC_Enable • ECCPageSize = FMC_ECCPageSize_512Bytes • TCLRSetupTime = 0 • TARSetupTime = 0 • CL = 30 pF In all timing tables, the Tfmc_ker_ck is the fmc_ker_ck clock period. Table 70. Synchronous non-multiplexed PSRAM write timings(1) Symbol Parameter Min Max Unit t(CLK) FMC_CLK period R×Tfmc_ker_ck -1(2) - ns td(CLKL-NExL) FMC_CLK low to FMC_NEx low (x=0..2) - 1 t(CLKH-NExH) FMC_CLK high to FMC_NEx high (x= 0…2) R×Tfmc_ker_ck/2+0.5(2) - td(CLKL-NADVL) FMC_CLK low to FMC_NADV low - 1.5 td(CLKL-NADVH) FMC_CLK low to FMC_NADV high 1 - td(CLKL-AV) FMC_CLK low to FMC_Ax valid (x=16…25) - 1 td(CLKH-AIV) FMC_CLK high to FMC_Ax invalid (x=16…25) R×Tfmc_ker_ck/2+1.5(2) - td(CLKL-NWEL) FMC_CLK low to FMC_NWE low - 1 td(CLKH-NWEH) FMC_CLK high to FMC_NWE high R×Tfmc_ker_ck/2+0.5(2) - td(CLKL-Data) FMC_D[15:0] valid data after FMC_CLK low - 3 td(CLKL-NBLL) FMC_CLK low to FMC_NBL low 1 - td(CLKH-NBLH) FMC_CLK high to FMC_NBL high R×Tfmc_ker_ck/2+0.5(2) - tsu(NWAIT-CLKH) FMC_NWAIT valid before FMC_CLK high 3 - th(CLKH-NWAIT) FMC_NWAIT valid after FMC_CLK high 1.5 - 1. Guaranteed by characterization results. 2. Clock ratio R = (FMC_CLK period / fmc_ker_ck period). |
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