STM32F100RB STMicroelectronics, STM32F100RB Datasheet - Page 48

• Manufacturer Part Number: STM32F100RB
• Description: Mainstream Value line, ARM Cortex-M3 MCU with 128 Kbytes Flash, 24 MHz CPU, motor control and CEC functions
• Manufacturer: STMicroelectronics

Specifications of STM32F100RB

• Peripherals Supported: timers, ADC, SPIs, I2Cs, USARTs and DACs
• Conversion Range: 0 to 3.6 V
• 16-bit, 6-channel Advanced-control Timer: up to 6 channels for PWM output, dead time generation and emergency stop
• Systick Timer: 24-bit downcounter

Electrical characteristics
Note:
Caution:
Table 22.
1. Based on characterization, not tested in production.
2. Refer to the note and caution paragraphs above the table.
3. The oscillator selection can be optimized in terms of supply current using an high quality resonator with small R
4.
48/87
t
SU(LSE)
Symbol
example MSIV-TIN32.768 kHz. Refer to crystal manufacturer for more details
reached. This value is measured for a standard crystal and it can vary significantly with the crystal manufacturer
C
t
SU(LSE)
C
R
g
L2
I
L1
2
m
F
(2)
(4)
is the startup time measured from the moment it is enabled (by software) to a stabilized 32.768 kHz oscillation is
Low-speed external clock generated from a crystal/ceramic resonator
The low-speed external (LSE) clock can be supplied with a 32.768 kHz crystal/ceramic
resonator oscillator. All the information given in this paragraph are based on characterization
results obtained with typical external components specified in
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).
For C
15 pF range selected to match the requirements of the crystal or resonator. C
usually the same size. The crystal manufacturer typically specifies a load capacitance which
is the series combination of C
Load capacitance C
C
between 2 pF and 7 pF.
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
LSE oscillator characteristics (f
Feedback resistor
Recommended load capacitance
versus equivalent serial
resistance of the crystal (R
LSE driving current
Oscillator transconductance
Startup time
stray
L1
is the pin capacitance and board or trace PCB-related capacitance. Typically, it is
L1
and C
= C
Parameter
L2
L2
= 8 pF.
it is recommended to use high-quality ceramic capacitors in the 5 pF to
L
has the following formula: C
S
)
(3)
STM32F100x4, STM32F100x6, STM32F100x8, STM32F100xB
L1
Doc ID 16455 Rev 6
and C
LSE
stabilized
V
DD
= 32.768 kHz)
L2
is
.
L1
L
≤
and C
Conditions
R
V
7 pF. Never use a resonator with a load
T
T
T
T
T
T
T
L
V
T
DD
A
A
A
A
S
A
A
A
A
IN
= C
= -10 °C
= -20 °C
= -30 °C
= -40 °C
= 30 KΩ
= 50 °C
= 25 °C
= 10 °C
(1)
= 0 °C
L2
= 3.3 V
= V
L1
(15 pF) it is strongly recommended
SS
x C
L2
Table
/ (C
L
Min
5
= 6 pF, and C
L1
22. In the application,
+ C
Typ
1.5
2.5
10
17
32
60
5
4
L2
6
) + C
L1
and C
Max
S
1.4
stray
15
stray
value for
= 2 pF,
L2,
where
µA/V
Unit
MΩ
µA
pF
s
are