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STM32L062C8 bảng dữ liệu(PDF) 81 Page - STMicroelectronics

tên linh kiện STM32L062C8
Giải thích chi tiết về linh kiện  Ultra-low-power 32-bit MCU Arm®-based Cortex®-M0, 64 KB Flash,8 KB SRAM, 2 KB EEPROM, USB, ADC, DAC, AES
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STM32L062C8 bảng dữ liệu(HTML) 81 Page - STMicroelectronics

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DS10183 Rev 11
81/124
STM32L062x8
Electrical characteristics
101
Figure 21. 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 54).
Unless otherwise specified, the parameters given in Table 54 are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
Table 21.
ai14131d
10%
90%
50%
tr(IO)out
OUTPUT
EXTERNAL
ON CL
Maximum frequency is achieved if (tr + tf) ≤ (2/3)T and if the duty cycle is (45-55%)
when loaded by CL specified in the table “
I/O AC characteristics”.
10%
50%
90%
T
tf(IO)out
Table 54. 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
25
45
65
k
Ω
VF(NRST)(1) NRST input filtered pulse
-
-
-
50
ns
VNF(NRST)(1) NRST input not filtered pulse
-
350
-
-
ns



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