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STM32F091CB Datasheet(PDF) 70 Page - STMicroelectronics

No. de pieza STM32F091CB
Descripción Electrónicos  ARM-based 32-bit MCU, up to 256 KB Flash, CAN, 12 timers, ADC, DAC & comm. interfaces, 2.0 - 3.6V
PDF  127 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32F091CB Datasheet(HTML) 70 Page - STMicroelectronics

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Electrical characteristics
STM32F091xB STM32F091xC
70/127
DocID026284 Rev 3
Figure 17. Typical application with an 8 MHz crystal
1. REXT value depends on the crystal characteristics.
Low-speed external clock generated from a crystal resonator
The low-speed external (LSE) clock can be supplied with a 32.768 kHz crystal resonator
oscillator. All the information given in this paragraph are based on design simulation results
obtained with typical external components specified in Table 40. 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).
Table 40. LSE oscillator characteristics (fLSE = 32.768 kHz)
Symbol
Parameter
Conditions(1)
Min(2)
Typ
Max(2) Unit
IDD
LSE current consumption
LSEDRV[1:0]=00
lower driving capability
-0.5
0.9
µA
LSEDRV[1:0]= 01
medium low driving capability
--
1
LSEDRV[1:0] = 10
medium high driving capability
--
1.3
LSEDRV[1:0]=11
higher driving capability
--
1.6



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