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01CDU6 数据表(PDF) 114 Page - STMicroelectronics |
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01CDU6 数据表(HTML) 114 Page - STMicroelectronics |
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114 / 135 page  Electrical characteristics STM32F401xD STM32F401xE 114/135 Figure 45. SD default mode 6.3.25 RTC characteristics 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 - - CMD, D inputs (referenced to CK) in SD default mode tISUD Input setup time SD fpp = 24MHz 1.5 - - ns tIHD Input hold time SD fpp = 24MHz 0.5 - - CMD, D outputs (referenced to CK) in SD default mode tOVD Output valid default time SD fpp =24MHz - 4.5 6.5 ns tOHD Output hold default time SD fpp =24MHz 3.5 - - 1. Data based on characterization results, not tested in production. 2. VDD = 2.7 to 3.6 V. 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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