参数资料
型号: STM32L151CBT6DTR
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 32 MHz, RISC MICROCONTROLLER, PQFP48
封装: 7 X 7 MM, 0.50 MM PITCH, ROHS COMPLIANT, LQFP-48
文件页数: 80/106页
文件大小: 1417K
代理商: STM32L151CBT6DTR
STM32L151xx, STM32L152xx
Electrical characteristics
Doc ID 17659 Rev 1
Figure 18.
I/O AC characteristics definition
6.3.12
NRST pin characteristics
The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up
resistor, RPU (see Table 37).
Unless otherwise specified, the parameters given in Table 40 are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
ai14131
10%
90%
50%
tr(IO)out
External
Output
on 50pF
Maximum frequency is achieved if (tr + tf) 2/3)T and if the duty cycle is (45-55%)
10%
50%
90%
when loaded by 50 pF
T
tr(IO)out
Table 40.
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
VSS
0.8
V
VIH(NRST)
NRST input high level voltage
1.4
VDD
VOL(NRST)
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)
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
TBD
45
TBD
k
Ω
VF(NRST)
NRST input filtered pulse
50
ns
VNF(NRST)
NRST input not filtered pulse
350
ns
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