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STM32L072RZ Datasheet(PDF) 17 Page - STMicroelectronics |
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STM32L072RZ Datasheet(HTML) 17 Page - STMicroelectronics |
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17 / 160 page ![]() DS10689 Rev 5 17/160 STM32L072xx Functional overview 36 Table 3. Functionalities depending on the operating power supply range Operating power supply range(1) 1. GPIO speed depends on VDD voltage range. Refer to Table 62: I/O AC characteristics for more information about I/O speed. Functionalities depending on the operating power supply range DAC and ADC operation Dynamic voltage scaling range USB VDD = 1.65 to 1.71 V ADC only, conversion time up to 570 ksps Range 2 or range 3 Not functional VDD = 1.71 to 1.8 V(2) 2. CPU frequency changes from initial to final must respect "fcpu initial <4*fcpu final". It must also respect 5 μs delay between two changes. For example to switch from 4.2 MHz to 32 MHz, you can switch from 4.2 MHz to 16 MHz, wait 5 μs, then switch from 16 MHz to 32 MHz. ADC only, conversion time up to 1.14 Msps Range 1, range 2 or range 3 Functional(3) VDD = 1.8 to 2.0 V(2) Conversion time up to 1.14 Msps Range1, range 2 or range 3 Functional(3) VDD = 2.0 to 2.4 V Conversion time up to 1.14 Msps Range 1, range 2 or range 3 Functional(3) 3. To be USB compliant from the I/O voltage standpoint, the minimum VDD_USB is 3.0 V. VDD = 2.4 to 3.6 V Conversion time up to 1.14 Msps Range 1, range 2 or range 3 Functional(3) Table 4. CPU frequency range depending on dynamic voltage scaling CPU frequency range Dynamic voltage scaling range 16 MHz to 32 MHz (1ws) 32 kHz to 16 MHz (0ws) Range 1 8 MHz to 16 MHz (1ws) 32 kHz to 8 MHz (0ws) Range 2 32 kHz to 4.2 MHz (0ws) Range 3 |
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