STM32F215RGT6TR STMicroelectronics, STM32F215RGT6TR Datasheet - Page 83

• Manufacturer Part Number: STM32F215RGT6TR
• Description: ARM Microcontrollers - MCU STM32F21 High-Perf M3 1Mb 120 MHz MCU
• Manufacturer: STMicroelectronics

Specifications of STM32F215RGT6TR

• Product Category: ARM Microcontrollers - MCU
• Core: ARM Cortex M3
• Data Bus Width: 32 bit

STM32F21xxx
Note:
Note:
Caution:
Table 28.
1. Guaranteed by design, not tested in production.
2. t
For C
5 pF to 15 pF range selected to match the requirements of the crystal or resonator (see
Figure
specifies a load capacitance which is the series combination of C
Load capacitance C
C
between 2 pF and 7 pF.
For information on electing the crystal, refer to the application note AN2867 “Oscillator
design guide for ST microcontrollers” available from the ST website www.st.com.
To avoid exceeding the maximum value of C
to use a resonator with a load capacitance C
capacitance of 12.5 pF.
Example: if you choose a resonator with a load capacitance of C
then C
Figure 30. Typical application with a 32.768 kHz crystal
t
SU(LSE)
Symbol
stray
32.768 kHz oscillation is reached. This value is measured for a standard crystal resonator and it can vary
significantly with the crystal manufacturer
SU(LSE)
I
R
g
DD
m
F
L1
is the pin capacitance and board or trace PCB-related capacitance. Typically, it is
L1
Resonator with
integrated capacitors
30). C
(2)
and C
= C
is the startup time measured from the moment it is enabled (by software) to a stabilized
Feedback resistor
LSE current consumption
Oscillator Transconductance
startup time
LSE oscillator characteristics (f
L2
L1
L2
= 8 pF.
and C
C L2
C L1
it is recommended to use high-quality external ceramic capacitors in the
L
Parameter
has the following formula: C
L2,
32.768 kH z
resonator
are usually the same size. The crystal manufacturer typically
Doc ID 17050 Rev 8
OSC32_OU T
OSC32_IN
R F
L1
L
V
≤
DD
LSE
and C
Conditions
controlled
7 pF. Never use a resonator with a load
is stabilized
L
Bias
gain
= 32.768 kHz)
= C
L2
L1
(15 pF) it is strongly recommended
x C
L2
STM32F
/ (C
Electrical characteristics
Min
L
L1
2.8
f LSE
(1)
-
-
-
= 6 pF, and C
L1
and C
+ C
18.4
Typ
2
-
-
L2
L2
) + C
.
ai17531
Max
stray
1
stray
-
-
-
= 2 pF,
where
83/173
µA/V
Unit
MΩ
µA
s