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STM32F207IE 数据表(PDF) 141 Page - STMicroelectronics |
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STM32F207IE 数据表(HTML) 141 Page - STMicroelectronics |
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141 / 177 page ![]() STM32F20xxx Electrical characteristics Doc ID 15818 Rev 9 141/177 5.3.26 Camera interface (DCMI) timing specifications 5.3.27 SD/SDIO MMC card host interface (SDIO) characteristics Unless otherwise specified, the parameters given in Table 83 are derived from tests performed under ambient temperature, fPCLKx frequency and VDD supply voltage conditions summarized in Table 12. Refer to Section 5.3.16: I/O port characteristics for more details on the input/output alternate function characteristics (D[7:0], CMD, CK). Figure 72. SDIO high-speed mode Table 81. Switching characteristics for NAND Flash write cycles(1)(2) 1. CL = 30 pF. 2. Based on characterization, not tested in production. Symbol Parameter Min Max Unit tw(NWE) FSMC_NWE low width 4THCLK- 1 4THCLK+ 3 ns tv(NWE-D) FSMC_NWE low to FSMC_D[15-0] valid - 0 ns th(NWE-D) FSMC_NWE high to FSMC_D[15-0] invalid 3THCLK -ns td(D-NWE) FSMC_D[15-0] valid before FSMC_NWE high 5THCLK -ns td(ALE-NWE) FSMC_ALE valid before FSMC_NWE low - 3THCLK+ 2 ns th(NWE-ALE) FSMC_NWE high to FSMC_ALE invalid 3THCLK- 2 - ns Table 82. DCMI characteristics Symbol Parameter Conditions Min Max Frequency ratio DCMI_PIXCLK/ fHCLK DCMI_PIXCLK= 48 MHz 0.4 tW(CKH) CK D, CMD (output) D, CMD (input) tC tW(CKL) tOV tOH tISU tIH tf tr ai14887 |
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