Datasheet

DS10690 Rev 6 17/144
STM32L071xx Functional overview
33
V
DD
= 2.0 to 2.4 V
Conversion time up to 1.14
Msps
Range 1, range 2 or range 3
V
DD
= 2.4 to 3.6 V
Conversion time up to 1.14
Msps
Range 1, range 2 or range 3
1. GPIO speed depends on V
DD
voltage. Refer to Table 60: I/O AC characteristics for more information about
I/O speed.
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.
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
(1)
Functionalities depending on the operating power
supply range
ADC operation
Dynamic voltage scaling
range
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 Y -- Y -- -- --
Flash memory O O O O -- --
RAM Y Y Y Y Y --
Backup registers Y Y Y Y Y Y
EEPROM O O O O -- --
Brown-out reset
(BOR)
OOOOOOOO
DMA O O O O -- --
Programmable
Voltage Detector
(PVD)
OOOOOO-
Power-on/down
reset (POR/PDR)
YYYYYYYY
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