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STM32F030x4 데이터시트(PDF) 62 Page - STMicroelectronics

부품명 STM32F030x4
상세설명  Value-line ARM-based 32-bit MCU with 16 to 64-KB Flash, timers, ADC, communication interfaces, 2.4-3.6 V operation
PDF  88 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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STM32F030x4 데이터시트(HTML) 62 Page - STMicroelectronics

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Electrical characteristics
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DocID024849 Rev 1
Figure 18. I/O AC characteristics definition
6.3.15
NRST pin characteristics
The NRST pin input driver uses the CMOS technology. It is connected to a permanent pull-
up resistor, RPU (see Table 44: I/O static characteristics).
Unless otherwise specified, the parameters given in the table below are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
Table 18: General operating conditions.
MS32132V1
T
10%
50%
90%
10%
50%
90%
EXTERNAL
OUTPUT
ON 50 pF
Maximum frequency is achieved if (t + t (≤ 2/3)T and if the duty cycle is (45-55%)
when loaded by 50 pF
r
f
r(IO)out
t
f(IO)out
t
Table 47. NRST pin characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VIL(NRST)
NRST input low level voltage
–0.3
-
0.8(1)
V
VIH(NRST)
NRST input high level
voltage
2-
VDD+0.3
(1)
Vhys(NRST)
NRST Schmitt trigger
voltage hysteresis
-200
-
mV
RPU
Weak pull-up equivalent
resistor(2)
VIN VSS
30
40
50
k
VF(NRST)
NRST input filtered pulse
-
-
100(1)
ns
VNF(NRST)
NRST input not filtered pulse
300(1)
--
ns
1. Guaranteed by design, not tested in production.
2. The pull-up is designed with a true resistance in series with a switchable PMOS. This PMOS contribution to
the series resistance must be minimum (~10% order)
.



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