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STM32F479AI bảng dữ liệu(PDF) 161 Page - STMicroelectronics |
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STM32F479AI bảng dữ liệu(HTML) 161 Page - STMicroelectronics |
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161 / 208 page ![]() DocID028010 Rev 2 161/208 STM32F479xx Electrical characteristics 187 Figure 56. 12-bit buffered/non-buffered DAC 1. The DAC integrates an output buffer that can be used to reduce the output impedance and to drive external loads directly without the use of an external operational amplifier. The buffer can be bypassed by configuring the BOFFx bit in the DAC_CR register. 5.3.29 FMC characteristics Unless otherwise specified, the parameters given in Tables 89 through 102 for the FMC interface are derived from tests performed under the ambient temperature, fHCLK frequency and VDD supply voltage conditions summarized in Table 17, with the following configuration: • Output speed is set to OSPEEDRy[1:0] = 11 • Measurement points are done at CMOS levels: 0.5 VDD Refer to Section 5.3.20 for more details on the input/output characteristics. Asynchronous waveforms and timings Figures 57 through 60 represent asynchronous waveforms, and Tables 89 through 96 provide the corresponding timings. The results shown in these tables are obtained with the following FMC configuration: • AddressSetupTime = 0x1 • AddressHoldTime = 0x1 • DataSetupTime = 0x1 (except for asynchronous NWAIT mode , DataSetupTime = 0x5) • BusTurnAroundDuration = 0x0 • Capacitive load CL = 30 pF |
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