STM32F207ICH6 STMicroelectronics, STM32F207ICH6 Datasheet - Page 84

• Manufacturer Part Number: STM32F207ICH6
• Description: ARM Microcontrollers - MCU 32-Bit ARM Cortex M3 CAM 256 kB
• Manufacturer: STMicroelectronics

Specifications of STM32F207ICH6

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

Electrical characteristics
Note:
Note:
Caution:
84/177
Table 29.
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 31. 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
31). 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 15818 Rev 9
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
Min
L
L1
2.8
f LSE
(1)
-
-
-
= 6 pF, and C
L1
and C
+ C
18.4
Typ
2
-
-
L2
L2
) + C
.
STM32F20xxx
ai17531
Max
stray
1
stray
-
-
-
= 2 pF,
where
µA/V
Unit
MΩ
µA
s