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STM32F412RGU3 数据表(PDF) 165 Page - STMicroelectronics |
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STM32F412RGU3 数据表(HTML) 165 Page - STMicroelectronics |
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165 / 201 page  DocID028087 Rev 7 165/201 STM32F412xE/G Electrical characteristics 166 Figure 58. SDIO high-speed mode Figure 59. SD default mode Table 96. Dynamic characteristics: SD / MMC characteristics(1)(2) Symbol Parameter Conditions Min Typ Max Unit fPP Clock frequency in data transfer mode - 0 - 50 MHz - SDIO_CK/fPCLK2 frequency ratio - - - 8/3 - tW(CKL) Clock low time fpp =50MHz 9.5 10.5 - ns tW(CKH) Clock high time fpp =50MHz 8.5 9.5 - CMD, D inputs (referenced to CK) in MMC and SD HS mode tISU Input setup time HS fpp =50MHz 4 - - ns tIH Input hold time HS fpp =50MHz 2.5 - - CMD, D outputs (referenced to CK) in MMC and SD HS mode tOV Output valid time HS fpp =50MHz - 13 13.5 ns tOH Output hold time HS fpp =50MHz 11 - - |
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