STM32L071X8 datasheet(16/136 Pages) STMICROELECTRONICS

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Functional overview

STM32L071xx

16/136

DocID027101 Rev 3

VDD = 2.0 to 2.4 V

Conversion time up

to 1.14 Msps

Range 1, range 2 or

range 3

Full speed operation

VDD = 2.4 to 3.6 V

Conversion time up

to 1.14 Msps

Range 1, range 2 or

range 3

Full speed operation

1. 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.

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

Table 3. Functionalities depending on the operating power supply range (continued)

Operating power supply

range

Functionalities depending on the operating power supply range

ADC operation

Dynamic voltage

scaling range

I/O operation

Table 5. Functionalities depending on the working mode

(from Run/active down to standby) (1)(2)

IPs

Run/Active

Sleep

Low-

power

run

Low-

power

sleep

Stop

Standby

Wakeup

capability

Wakeup

capability

CPU

Flash memory

RAM

Backup registers

EEPROM

Brown-out reset

(BOR)

DMA

Programmable

Voltage Detector

(PVD)

Power-on/down

reset (POR/PDR)

High Speed

Internal (HSI)

(3)

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