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STM32F412RGH6TR 数据表(PDF) 108 Page - STMicroelectronics

部件名 STM32F412RGH6TR
功能描述  Arm®-Cortex®-M4 32b MCUFPU, 125 DMIPS, 1MB Flash, 256KB RAM, USB OTG FS, 17 TIMs, 1 ADC, 17 comm. interfaces
PDF  201 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STM32F412RGH6TR 数据表(HTML) 108 Page - STMicroelectronics

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Electrical characteristics
STM32F412xE/G
108/201
DocID028087 Rev 7
Low-speed external user clock generated from an external source
In bypass mode the LSE oscillator is switched off and the input pin is a standard I/O. The
external clock signal has to respect the Table 57. However, the recommended clock input
waveform is shown in Figure 28.
The characteristics given in Table 40 result from tests performed using an low-speed
external clock source, and under ambient temperature and supply voltage conditions
summarized in Table 16.
Figure 27. High-speed external clock source AC timing diagram
Table 40. Low-speed external user clock characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fLSE_ext
User External clock source
frequency(1)
-
32.768
1000
kHz
VLSEH
OSC32_IN input pin high level
voltage
0.7VDD
-VDD
V
VLSEL
OSC32_IN input pin low level voltage
VSS
-0.3VDD
tw(LSE)
tf(LSE)
OSC32_IN high or low time(1)
450
-
-
ns
tr(LSE)
tf(LSE)
OSC32_IN rise or fall time(1)
--
50
Cin(LSE)
OSC32_IN input capacitance(1)
-5
-
pF
DuCy(LSE) Duty cycle
30
-
70
%
IL
OSC32_IN Input leakage current
VSS ≤ VIN ≤ VDD
--
±1
µA
1. Guaranteed by design, not tested in production.



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