STM32F051R4T6TR STMicroelectronics, STM32F051R4T6TR Datasheet - Page 60

• Manufacturer Part Number: STM32F051R4T6TR
• Description: ARM Microcontrollers - MCU ARM Cortex M0 16kB 48 MHz CPU 8kB Flash
• Manufacturer: STMicroelectronics

Specifications of STM32F051R4T6TR

• Rohs: yes

STM32F051x
Table 37.
1. Refer to the note and caution paragraphs below the table, and to the application note AN2867 “Oscillator design guide for
2. Guaranteed by design, not tested in production.
3.
Note:
t
SU(LSE)
Symbol
ST microcontrollers”.
reached. This value is measured for a standard crystal and it can vary significantly with the crystal manufacturer
t
I
g
SU(LSE)
DD
m
(3)
is the startup time measured from the moment it is enabled (by software) to a stabilized 32.768 kHz oscillation is
LSE current consumption
Oscillator
transconductance
Startup time
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
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).
LSE oscillator characteristics (f
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.
Parameter
medium high driving capability
medium high driving capability
Doc ID 022265 Rev 3
medium low driving capability
medium low driving capability
higher driving capability
higher driving capability
lower driving capability
lower driving capability
LSE
LSEDRV[1:0] = 10
LSEDRV[1:0] = 10
LSEDRV[1:0]= 01
LSEDRV[1:0]= 01
LSEDRV[1:0]=00
LSEDRV[1:0]=11
LSEDRV[1:0]=00
LSEDRV[1:0]=11
V
Conditions
DD
= 32.768 kHz)
is stabilized
(1)
Table
37. In the application, the
Min
Electrical characteristics
15
25
5
8
-
-
-
-
-
(2)
Typ
0.5
2
-
-
-
-
-
-
-
Max
0.9
1.3
1.6
1
-
-
-
-
-
(2)
61/105
µA/V
Unit
µA
s