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STM32F411CC 数据表(PDF) 123 Page - STMicroelectronics |
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STM32F411CC 数据表(HTML) 123 Page - STMicroelectronics |
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123 / 149 page  DocID026289 Rev 6 123/149 STM32F411xC STM32F411xE Electrical characteristics 123 6.3.25 RTC characteristics Table 77. Dynamic characteristics: eMMC characteristics VDD = 1.7 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 - 50 MHz - SDIO_CK/fPCLK2 frequency ratio - - - 8/3 - tW(CKL) Clock low time fpp = 50 MHz 10 10.5 - ns tW(CKH) Clock high time fpp = 50 MHz 9 9.5 - CMD, D inputs (referenced to CK) in eMMC mode tISU Input setup time HS fpp = 50 MHz 0 - - ns tIH Input hold time HS fpp = 50 MHz 6 - - CMD, D outputs (referenced to CK) in eMMC mode tOV Output valid time HS fpp = 50 MHz - 3.5 5 ns tOH Output hold time HS fpp = 50 MHz 2 - - Table 78. RTC characteristics Symbol Parameter Conditions Min Max -fPCLK1/RTCCLK frequency ratio Any read/write operation from/to an RTC register 4- |
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