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STM32F401RBT6 数据手册 - ST Microelectronics（意法半导体）
制造商:
ST Microelectronics（意法半导体）
分类:
微控制器
封装:
LQFP-64
描述:
STMICROELECTRONICS STM32F401RBT6 微控制器, 32位, 动态效率线, ARM 皮质-M4, 84 MHz, 128 KB, 64 KB, 64 引脚, LQFP
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引脚图在P32P33P34P35P36P37P38P39P40P41P42P43Hot
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封装尺寸在P114P115P116P117P118P119P120P121P122P123P124P125
型号编码规则在P130
技术参数、封装参数在P57P87
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STM32F401RBT6数据手册
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DocID024738 Rev 5 77/134
STM32F401xB STM32F401xC Electrical characteristics
113
series combination of C
L1
and C
L2
. PCB and MCU pin capacitance must be included (10 pF
can be used as a rough estimate of the combined pin and board capacitance) when sizing
C
L1
and C
L2
.
Note: For information on selecting the crystal, refer to the application note AN2867 “Oscillator
design guide for ST microcontrollers” available from the ST website www.st.com.
Figure 24. Typical application with an 8 MHz crystal
1. R
EXT
value depends on the crystal characteristics.
Low-speed external clock generated from a crystal/ceramic resonator
The low-speed external (LSE) clock can be supplied with a 32.768 kHz crystal/ceramic
resonator oscillator. All the information given in this paragraph are based on
characterization results obtained with typical external components specified in Table 38. In
the application, the resonator and the load capacitors have to be placed as close as
possible to the oscillator pins in order to minimize output distortion and startup stabilization
time. Refer to the crystal resonator manufacturer for more details on the resonator
characteristics (frequency, package, accuracy).
Note: For information on selecting the crystal, refer to the application note AN2867 “Oscillator
design guide for ST microcontrollers” available from the ST website www.st.com.
Table 38. LSE oscillator characteristics (f
LSE
= 32.768 kHz)
(1)
1. Guaranteed by design.
Symbol Parameter Conditions Min Typ Max Unit
R
F
Feedback resistor - 18.4 - MΩ
I
DD
LSE current consumption - - 1 µA
G
m
_crit_max Maximum critical crystal g
m
Startup - - 0.56 µA/V
t
SU(LSE)
(2)
2. t
SU(LSE)
is the startup time measured from the moment it is enabled (by software) to a stabilized
32.768 kHz oscillation is reached. This value is guaranteed by characterization. It is measured for a
standard crystal resonator and it can vary significantly with the crystal manufacturer.
startup time V
DD
is stabilized - 2 - s
DL
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