STEVAL-PCC012V1 STMicroelectronics, STEVAL-PCC012V1 Datasheet - Page 48

• Manufacturer Part Number: STEVAL-PCC012V1
• Description: BOARD DEM CONN GATEWAY STM32F107
• Manufacturer: STMicroelectronics
• Series: STM32r
• Type: Other Power Managementr

Specifications of STEVAL-PCC012V1

• Main Purpose: Interface, Connectivity
• Embedded: Yes, MCU, 32-Bit
• Utilized Ic / Part: STM32F107
• Primary Attributes: Ethernet and 4 Digital/Analog Connectors
• Secondary Attributes: On-Board LEDs and Joystick
• Interface Type: Ethernet, USB, I2C, SPI, UART
• Operating Supply Voltage: 3.3 V
• Product: Power Management Development Tools
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: STM32F107xx
• Other names: 497-10757

Electrical characteristics
Note:
Caution:
48/101
resonator manufacturer for more details on the resonator characteristics (frequency,
package, accuracy).
Table 23.
1. Based on characterization, not tested in production.
2. Refer to the note and caution paragraphs below the table, and to the application note AN2867 “Oscillator
3. The oscillator selection can be optimized in terms of supply current using an high quality resonator with
4. 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.
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 17. Typical application with a 32.768 kHz crystal
t
SU(LSE)
Symbol
stray
design guide for ST microcontrollers”.
small R
32.768 kHz oscillation is reached. This value is measured for a standard crystal resonator and it can vary
significantly with the crystal manufacturer
C
SU(LSE)
R
g
I
(2)
2
m
F
L1
is the pin capacitance and board or trace PCB-related capacitance. Typically, it is
L1
17). C
Resonator with
integrated capacitors
(4)
and C
S
= C
is the startup time measured from the moment it is enabled (by software) to a stabilized
value for example MSIV-TIN32.768kHz. Refer to crystal manufacturer for more details
Feedback resistor
Recommended load capacitance
versus equivalent serial
resistance of the crystal (R
LSE driving current
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 15274 Rev 5
OSC32_OU T
S
OSC32_IN
)
(3)
V
R F
DD
L1
L
V

= 3.3 V, V
DD
LSE
and C
Conditions
R
controlled
S
7 pF. Never use a resonator with a load
is stabilized
L
Bias
= 30 k
gain
= 32.768 kHz)
= C
L2
L1
IN
(15 pF) it is strongly recommended
= V
x C
SS
STM32F105xx, STM32F107xx
L2
STM32F10xxx
/ (C
Min
L
L1
(1)
f LSE
5
= 6 pF, and C
L1
and C
+ C
Typ
5
3
L2
L2
) + C
.
Max
1.4
15
stray
stray
ai14129b
= 2 pF,
where
µA/V
Unit
M
pF
µA
s