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STM32L552CEU6PTR 数据表(PDF) 305 Page - STMicroelectronics |
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STM32L552CEU6PTR 数据表(HTML) 305 Page - STMicroelectronics |
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305 / 340 page  DS12737 Rev 6 305/340 STM32L552xx Electrical characteristics 307 CMD, D outputs (referenced to CK) in SD default mode tOVD Output valid default time SD - - 1 2.5 ns tOHD Output hold default time SD - 0.5 - - 1. Guaranteed by characterization results. 2. For SD 1.8 V support, an external voltage converter is needed. Table 151. Dynamics characteristics: eMMC characteristics VDD=1.71 V to 1.9 V(1)(2) 1. Guaranteed by characterization results. 2. Cload=20 pF. Symbol Parameter Conditions Min Typ Max Unit fPP Clock frequency in data transfer mode -0 - 52 MHz - SDIO_CK/fPCLK2 frequency ratio - - - 8/3 - tW(CKL) Clock low time fpp =52 MHz 8.5 9.5 - ns tW(CKH) Clock high time fpp =52 MHz 8.5 9.5 - CMD, D inputs (referenced to CK) in eMMC mode tISU Input setup time HS - 2.5 - - ns tIH Input hold time HS - 2 - - CMD, D outputs (referenced to CK) in eMMC mode tOV Output valid time HS - - 5.5 6.5 ns tOH Output hold time HS - 4 - - Table 150. Dynamics characteristics: SD / eMMC characteristics, VDD=2.7V to 3.6 V(1) (continued) Symbol Parameter Conditions Min Typ Max Unit |
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