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STM32U535NET3QTR 数据表(PDF) 195 Page - STMicroelectronics |
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STM32U535NET3QTR 数据表(HTML) 195 Page - STMicroelectronics |
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195 / 278 page  DS14217 Rev 1 195/278 STM32U535xx Electrical characteristics 253 Low-speed internal (LSI) RC oscillator 5.3.9 PLL characteristics The parameters given in the table below are derived from tests performed under temperature and VDD supply voltage conditions summarized in Table 32. Table 83. LSI oscillator characteristics Symbol Parameter Conditions Min Typ Max Unit fLSI LSI frequency VDD = 3.0 V, TJ = 30 °C, LSIPREDIV = 0 31.4 - 32.6 kHz VDD = 3.0 V, TJ = 30 °C, LSIPREDIV = 1 0.245 - 0.255 1.58 V≤ VDD ≤ 3.6 V, TJ = –40 to 125 °C 30.4(1) -33.6(1) DuCy(LSI) LSI duty cycle LSIPREDIV = 1 - 50 - % tSU(LSI)(2) LSI oscillator startup time - - 230 260 μs tSTAB(LSI)(2) LSI oscillator stabilization time 5% of final frequency - 230 260 IDD(LSI)(2) LSI oscillator power consumption LSIPREDIV = 0 - 140 255 nA LSIPREDIV = 1 - 130 240 1. Evaluated by characterization. Not tested in production. 2. Specified by design. Not tested in production. Table 84. PLL characteristics(1) Symbol Parameter Conditions Min Typ Max Unit fPLL_IN PLL input clock - 4 - 16 MHz PLL input clock duty cycle -10 - 90 % fPLL_OUT PLL P, Q, R output clock Voltage scaling range 1 1 - 160(2) MHz Voltage scaling range 2 1 - 110 Voltage scaling range 3 1 - 55 fVCO_OUT PLL VCO output Voltage scaling range 1, 2 128 - 544 Voltage scaling range 3 128 - 330 Duty cycle with division 1 40 - 60 % tLOCK(3)(4) PLL lock time Integer mode - 25 50 μs Fractional mode - 40 65 Jitter RMS cycle-to- cycle jitter Integer mode, VCO = 544 MHz - 20 - ±ps Fractional mode, VCO = 544 MHz - 70 - RMS period jitter Integer mode, VCO = 544 MHz - 35 - Fractional mode, VCO = 544 MHz - 45 - Long-term jitter(5), fPLL_IN = 8 MHz Integer mode, VCO = 544 MHz - 160 - Fractional mode, VCO = 544 MHz - 170 - |
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