STM32F205RCT6 STMicroelectronics, STM32F205RCT6 Datasheet - Page 79

• Manufacturer Part Number: STM32F205RCT6
• Description: MCU ARM 256KB FLASH 64LQFP
• Manufacturer: STMicroelectronics
• Series: STM32r

Specifications of STM32F205RCT6

• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 120MHz
• Connectivity: CAN, I²C, IrDA, LIN, MMC, SPI, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, I²S, LCD, POR, PWM, WDT
• Number Of I /o: 51
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 100K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 16x12b; D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-LFQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-11154

STM32F205xx, STM32F207xx
Note:
Caution:
Table 26.
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 31. 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
Resonator with
integrated capacitors
31). C
(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 15818 Rev 6
OSC32_OU T
OSC32_IN
S
)
(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
gain
= 30 kΩ
= 32.768 kHz)
= C
L2
L1
IN
(15 pF) it is strongly recommended
= V
x C
SS
L2
STM32F
/ (C
Electrical characteristics
Min
L
L1
f LSE
(1)
7
-
-
-
-
= 6 pF, and C
L1
and C
+ C
18.4
Typ
2
-
-
-
L2
L2
) + C
.
ai17531
Max
3.5
15
stray
stray
-
-
-
= 2 pF,
where
79/163
µA/V
Unit
MΩ
pF
µA
s