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STM32F303VC 数据表(PDF) 75 Page - STMicroelectronics

部件名 STM32F303VC
功能描述  ARM®-based Cortex®-M4 32b MCUFPU, up to 256KB Flash 48KB SRAM, 4 ADCs, 2 DAC ch., 7 comp, 4 PGA, timers, 2.0-3.6 V
PDF  148 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STM32F303VC 数据表(HTML) 75 Page - STMicroelectronics

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STM32F303xB STM32F303xC
Electrical characteristics
124
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 GPIO. The
external clock signal has to respect the I/O characteristics in Section 6.3.14. However, the
recommended clock input waveform is shown in Figure 15
Figure 15. Low-speed external clock source AC timing diagram
Table 41. Low-speed external user clock characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fLSE_ext
User External clock source
frequency(1)
1. Guaranteed by design.
-
-
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(LSEH)
tw(LSEL)
OSC32_IN high or low time(1)
450
-
-
ns
tr(LSE)
tf(LSE)
OSC32_IN rise or fall time(1)
--
50



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