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STM32F401CB 数据表(PDF) 112 Page - STMicroelectronics |
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STM32F401CB 数据表(HTML) 112 Page - STMicroelectronics |
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112 / 134 page  Electrical characteristics STM32F401xB STM32F401xC 112/134 DocID024738 Rev 5 Refer to Section 6.3.16: I/O port characteristics for more details on the input/output characteristics. Figure 44. SDIO high-speed mode Figure 45. SD default mode tW(CKH) CK D, CMD (output) D, CMD (input) tC tW(CKL) tOV tOH tISU tIH tf tr ai14887 CK D, CMD (output) tOVD tOHD ai14888 Table 77. Dynamic characteristics: SD / MMC characteristics(1)(2) Symbol Parameter Conditions Min Typ Max Unit fPP Clock frequency in data transfer mode 0 - 48 MHz - SDIO_CK/fPCLK2 frequency ratio - - 8/3 - tW(CKL) Clock low time fpp = 48MHz 8.5 9 - ns tW(CKH) Clock high time fpp = 48MHz 8.3 10 - CMD, D inputs (referenced to CK) in MMC and SD HS mode tISU Input setup time HS fpp = 48MHz 3.5 - - ns tIH Input hold time HS fpp = 48MHz 0 - - CMD, D outputs (referenced to CK) in MMC and SD HS mode tOV Output valid time HS fpp = 48MHz - 4.5 7 ns tOH Output hold time HS fpp = 48MHz 3 - - |
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