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STM32U545NET3QTR 数据表(PDF) 198 Page - STMicroelectronics |
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STM32U545NET3QTR 数据表(HTML) 198 Page - STMicroelectronics |
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198 / 283 page  Electrical characteristics STM32U545xx 198/283 DS14216 Rev 1 High-speed internal 48 MHz (HSI48) RC oscillator IDD(MSI)(3) MSI oscillator power consumption Continuous mode(7) LDO MSI range 0 to 3 - 21 + 2.5 µA/MHz - µA MSI range 4 to 15 - 19 + 2.5 µA/MHz - SMPS(9) MSI range 0 to 3 - 21 + 1,3 µA/MHz - MSI range 4 to 15 - 19 + 1,3 µA/MHz - Sampling mode(8) LDO Range 0 to 3 - 3 + 2.5 µA/MHz - Range 4 to 15 - 1 + 2.5µA/ MHz - SMPS Range 0 to 3 - 3 + 1 µA/MHz - Range 4 to 15 - 1 + 1 µA/MHz - 1. Evaluated by characterization and not tested in production, unless otherwise specified. 2. In PLL mode, the MSI accuracy is the LSE crystal accuracy. 3. Specified by design. Not tested in production. 4. This is a deviation for an individual part once the initial frequency has been measured. 5. The MSI startup time is the time when the four MSIRCs are in power down. 6. This delay is the time to switch from one MSIRC to another one. In case the destination MSIRC is in power down, the total delay is tsu(MSI) + tswitch(MSI). 7. The MSI is in continuous mode when the internal regulator is in voltage range 1, 2 or 3. 8. The MSI is in sampling mode when MSIBIAS = 1 in RCC_ICSCR1, and the regulator is in voltage range 4, or when the device is in Stop 1 or Stop 2 mode. 9. SMPS efficiency in range 1, based on VCORE current = 19.4 mA (CoreMark current on VCORE at 160 MHz). Table 82. MSI oscillator characteristics(1) (continued) Symbol Parameter Conditions Min Typ Max Unit Table 83. HSI48 oscillator characteristics Symbol Parameter Conditions Min Typ Max Unit fHSI48 HSI48 frequency after factory calibration VDD = 3.0 V, TJ = 30 °C 47.5 48 48.5 MHz |
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