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STM32L072KZ 数据表(PDF) 85 Page - STMicroelectronics |
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STM32L072KZ 数据表(HTML) 85 Page - STMicroelectronics |
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85 / 147 page  DocID027100 Rev 3 85/147 STM32L072xx Electrical characteristics 117 High-speed internal 48 MHz (HSI48) RC oscillator Low-speed internal (LSI) RC oscillator Multi-speed internal (MSI) RC oscillator Table 48. HSI48 oscillator characteristics(1) 1. VDDA = 3.3 V, TA = –40 to 125 °C unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit fHSI48 Frequency - 48 - MHz TRIM HSI48 user-trimming step 0.09(2) 0.14 0.2(2) % DuCy(HSI48) Duty cycle 45(2) 2. Guaranteed by design. -55(2) % ACCHSI48 Accuracy of the HSI48 oscillator (factory calibrated before CRS calibration) TA = 25 °C -4(3) 3. Guaranteed by characterization results. -4(3) % tsu(HSI48) HSI48 oscillator startup time - - 6(2) µs IDDA(HSI48) HSI48 oscillator power consumption - 330 380(2) µA Table 49. LSI oscillator characteristics Symbol Parameter Min Typ Max Unit fLSI(1) 1. Guaranteed by test in production. LSI frequency 26 38 56 kHz DLSI(2) 2. This is a deviation for an individual part, once the initial frequency has been measured. LSI oscillator frequency drift 0°C TA 85°C -10 - 4 % tsu(LSI)(3) 3. Guaranteed by design. LSI oscillator startup time - - 200 µs IDD(LSI)(3) LSI oscillator power consumption - 400 510 nA Table 50. MSI oscillator characteristics Symbol Parameter Condition Typ Max Unit fMSI Frequency after factory calibration, done at VDD= 3.3 V and TA = 25 °C MSI range 0 65.5 - kHz MSI range 1 131 - MSI range 2 262 - MSI range 3 524 - MSI range 4 1.05 - MHz MSI range 5 2.1 - MSI range 6 4.2 - |
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