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STM32F412RGT3TR 数据表(PDF) 166 Page - STMicroelectronics |
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STM32F412RGT3TR 数据表(HTML) 166 Page - STMicroelectronics |
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166 / 201 page  Electrical characteristics STM32F412xE/G 166/201 DocID028087 Rev 7 6.3.27 RTC characteristics CMD, D inputs (referenced to CK) in SD default mode tISUD Input setup time SD fpp =25MHz 2.5 - - ns tIHD Input hold time SD fpp =25MHz 2.5 - - CMD, D outputs (referenced to CK) in SD default mode tOVD Output valid default time SD fpp =25 MHz -1.5 2 ns tOHD Output hold default time SD fpp =25 MHz 0.5 - - 1. Guaranteed by characterization results, not tested in production. 2. VDD = 2.7 to 3.6 V. Table 96. Dynamic characteristics: SD / MMC characteristics(1)(2) (continued) Symbol Parameter Conditions Min Typ Max Unit Table 97. Dynamic characteristics: eMMC characteristics VDD = 1.7 V to 1.9 V(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 eMMC mode tISU Input setup time HS fpp =50MHz 3.5 - - ns tIH Input hold time HS fpp =50MHz 4 - - CMD, D outputs (referenced to CK) in eMMC mode tOV Output valid time HS fpp =50MHz - 13.5 15 ns tOH Output hold time HS fpp =50MHz 12 - - 1. Guaranteed by characterization results, not tested in production. 2. CLOAD = 20 pF. Table 98. 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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