參數(shù)資料
型號: STM32F103RCT7
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 32-BIT, FLASH, 72 MHz, RISC MICROCONTROLLER, PQFP64
封裝: 10 X 10 MM, 0.50 MM PITCH, ROHS COMPLIANT, LQFP-64
文件頁數(shù): 101/118頁
文件大?。?/td> 1508K
代理商: STM32F103RCT7
STM32F103xC, STM32F103xD, STM32F103xE
Electrical characteristics
Figure 41.
I/O AC characteristics definition
5.3.14
NRST pin characteristics
The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up
resistor, RPU (see Table 45).
Unless otherwise specified, the parameters given in Table 48 are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
ai14131
10%
90%
50%
tr(IO)out
OUTPUT
EXT ERNAL
ON 50pF
Maximum fr equency is achieved if (tr + tf) 2/3)T and if the duty cycle is (45-55%)
10%
50%
90%
when loaded by 50pF
T
tr(IO)out
Table 48.
NRST pin characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VIL(NRST)
(1)
1.
Guaranteed by design, not tested in production.
NRST Input low level voltage
–0.5
0.8
V
VIH(NRST)
NRST Input high level voltage
2
VDD+0.5
Vhys(NRST)
NRST Schmitt trigger voltage
hysteresis
200
mV
RPU
Weak pull-up equivalent resistor(2)
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)
.
VIN = VSS
30
40
50
k
Ω
VF(NRST)
NRST Input filtered pulse
100
ns
VNF(NRST)
NRST Input not filtered pulse
300
ns
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