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STM32L071CB Folha de dados(PDF) 101 Page - STMicroelectronics

Nome de Peças STM32L071CB
Descrição Electrónicos  Access line ultra-low-power 32-bit MCU ARM-based Cortex-M0, up to 192KB Flash, 20KB SRAM, 6KB EEPROM, ADC
PDF  136 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32L071CB Folha de dados(HTML) 101 Page - STMicroelectronics

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STM32L071xx
Electrical characteristics
107
The analog spike filter is compliant with I2C timings requirements only for the following
voltage ranges:
Fast mode Plus: 2.7 V
VDD 3.6 V and voltage scaling Range 1
Fast mode:
–2 V
 VDD  3.6 V and voltage scaling Range 1 or Range 2.
–VDD < 2 V, voltage scaling Range 1 or Range 2, Cload < 200 pF.
In other ranges, the analog filter should be disabled. The digital filter can be used instead.
Note:
In Standard mode, no spike filter is required.
USART/LPUART characteristics
The parameters given in the following table are guaranteed by design.
Table 70. I2C analog filter characteristics(1)
1. Guaranteed by characterization results.
Symbol
Parameter
Conditions
Min
Max
Unit
tAF
Maximum pulse width of spikes that
are suppressed by the analog filter
Range 1
50(2)
2. Spikes with widths below tAF(min) are filtered.
100(3)
3. Spikes with widths above tAF(max) are not filtered
ns
Range 2
-
Range 3
-
Table 71. USART/LPUART characteristics
Symbol
Parameter
Conditions
Typ
Max
Unit
tWUUSART
Wakeup time needed to
calculate the maximum
USART/LPUART baudrate
allowing to wake up from
Stop mode
Stop mode with main regulator in
Run mode, Range 2 or 3
-8.7
µs
Stop mode with main regulator in
Run mode, Range 1
-8.1
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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