STM32L072X8 Datasheet, PDF (109/147 Pages) STMicroelectronics – Ultra-low-power 32-bit MCU ARM-based Cortex-M0+, up to 192KB Flash, 20KB SRAM, 6KB EEPROM, USB, ADC, DACs

STM32L072xx
Electrical characteristics
Note:
The analog spike filter is compliant with I²C timings requirements only for the following
voltage ranges:
 Fast mode Plus: 2.7 V V_DD 3.6 V and voltage scaling Range 1
 Fast mode:
– 2 V  V_DD  3.6 V and voltage scaling Range 1 or Range 2.
– V_DD < 2 V, voltage scaling Range 1 or Range 2, C_load < 200 pF.
In other ranges, the analog filter should be disabled. The digital filter can be used instead.
In Standard mode, no spike filter is required.
Table 73. I2C analog filter characteristics⁽¹⁾
Symbol
Parameter
Conditions
Min
Range 1
t_AF
Maximum pulse width of spikes that
are suppressed by the analog filter
Range 2
Range 3
50⁽²⁾
1. Guaranteed by characterization results.
2. Spikes with widths below t_AF(min) are filtered.
3. Spikes with widths above t_AF(max) are not filtered
Max
100⁽³⁾
-
-
Unit
ns
USART/LPUART characteristics
The parameters given in the following table are guaranteed by design.
Symbol
Table 74. USART/LPUART characteristics
Parameter
Conditions
Typ
Max
Unit
Stop mode with main regulator in
Run mode, Range 2 or 3
-
8.7
Wakeup time needed to ^{Stop mode with main regulator in}
calculate the maximum ^{Run mode, Range 1}
-
8.1
t_WUUSART
USART/LPUART baudrate
µs
allowing to wake up from
Stop mode
Stop mode with main regulator in
low-power mode, Range 2 or 3
-
12
Stop mode with main regulator in
low-power mode, Range 1
-
11.4
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