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STM32L151C6U6ADTR bảng dữ liệu(PDF) 87 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3,128KB Flash, 32KB SRAM, 4KB EEPROM, LCD, USB, ADC, DAC
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STM32L151C6U6ADTR bảng dữ liệu(HTML) 87 Page - STMicroelectronics

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STM32L151x6/8/B-A STM32L152x6/8/B-A
Electrical characteristics
105
Figure 19. 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 (see Table 46).
Unless otherwise specified, the parameters given in Table 46 are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
Table 14.
Table 46. NRST pin characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VIL(NRST)(1) NRST input low level voltage
-
-
-
0.3 VDD
V
VIH(NRST)(1) NRST input high level voltage
-
0.39 VDD+0.59
-
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)
mV
RPU
Weak pull-up equivalent
resistor(3)
VIN = VSS
25
45
65
k
Ω
VF(NRST)(1) NRST input filtered pulse
-
-
-
50
ns
VNF(NRST)(1) NRST input not filtered pulse
-
350
-
-
ns
1. Guaranteed by design.
2. 200 mV minimum value.
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%.



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