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STM32F411CC 数据表(PDF) 121 Page - STMicroelectronics |
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STM32F411CC 数据表(HTML) 121 Page - STMicroelectronics |
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121 / 149 page  DocID026289 Rev 6 121/149 STM32F411xC STM32F411xE Electrical characteristics 123 6.3.24 SD/SDIO MMC/eMMC card host interface (SDIO) characteristics Unless otherwise specified, the parameters given in Table 76 for the SDIO/MMC/eMMC interface are derived from tests performed under the ambient temperature, fPCLK2 frequency and VDD supply voltage conditions summarized in Table 14, with the following configuration: • Output speed is set to OSPEEDRy[1:0] = 10 • Capacitive load C = 30 pF (for eMMC C = 20 pF) • Measurement points are done at CMOS levels: 0.5VDD 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 |
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