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STM32L051C8 bảng dữ liệu(PDF) 85 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  Access line ultra-low-power 32-bit MCU ARM-based Cortex-M0, up to 64 KB Flash, 8 KB SRAM, 2 KB EEPROM, ADC
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STM32L051C8 bảng dữ liệu(HTML) 85 Page - STMicroelectronics

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STM32L051x6 STM32L051x8
Electrical characteristics
100
Figure 26. I/O AC characteristics definition
6.3.14
NRST pin characteristics
The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up
resistor, RPU , except when it is internally driven low (see Table 59).
Unless otherwise specified, the parameters given in Table 59 are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
Table 23.
Table 59. NRST pin characteristics
Symbol
Parameter
Conditions
Min
Typ
Max Unit
VIL(NRST)(1)
1. Guaranteed by design.
NRST input low level voltage
-
VSS
-0.8
V
VIH(NRST)(1) NRST input high level voltage
-
1.4
-
VDD
VOL(NRST)(1)
NRST output low level
voltage
IOL = 2 mA
2.7 V < VDD < 3.6 V
--
0.4
IOL = 1.5 mA
1.65 V < VDD < 2.7 V
--
Vhys(NRST)(1)
NRST Schmitt trigger voltage
hysteresis
--
10%VDD(2)
2. 200 mV minimum value
-mV
RPU
Weak pull-up equivalent
resistor(3)
3. The pull-up is designed with a true resistance in series with a switchable PMOS. This PMOS contribution to
the series resistance is around 10%.
VIN VSS
30
45
60
k
VF(NRST)(1) NRST input filtered pulse
-
-
-
50
ns
VNF(NRST)(1) NRST input not filtered pulse
-
350
-
-
ns



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