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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F217VG датащи(PDF) 122 Page - STMicroelectronics |
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STM32F217VG датащи(HTML) 122 Page - STMicroelectronics |
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122 / 173 page  Electrical characteristics STM32F21xxx 122/173 Doc ID 17050 Rev 8 5.3.24 Embedded reference voltage The parameters given in Table 68 are derived from tests performed under ambient temperature and VDD supply voltage conditions summarized in Table 11. 5.3.25 FSMC characteristics Asynchronous waveforms and timings Figure 53 through Figure 56 represent asynchronous waveforms and Table 69 through Table 72 provide the corresponding timings. The results shown in these tables are obtained with the following FSMC configuration: ● AddressSetupTime = 1 ● AddressHoldTime = 1 ● DataSetupTime = 1 ● BusTurnAroundDuration = 0x0 In all timing tables, the THCLK is the HCLK clock period. Table 68. Embedded internal reference voltage Symbol Parameter Conditions Min Typ Max Unit VREFINT Internal reference voltage –40 °C < TA < +105 °C 1.18 1.21 1.24 V TS_vrefint (1) 1. Shortest sampling time can be determined in the application by multiple iterations. ADC sampling time when reading the internal reference voltage 10 - - µs VRERINT_s (2) 2. Guaranteed by design, not tested in production. Internal reference voltage spread over the temperature range VDD = 3 V - 3 5 mV TCoeff (2) Temperature coefficient - 30 50 ppm/°C tSTART (2) Startup time - 6 10 µs |
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