STM32F102R4T6A STMicroelectronics, STM32F102R4T6A Datasheet - Page 41

• Manufacturer Part Number: STM32F102R4T6A
• Description: MCU ARM 32BIT 16KB FLASH 64-LQFP
• Manufacturer: STMicroelectronics
• Series: STM32r

Specifications of STM32F102R4T6A

• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 48MHz
• Connectivity: I²C, IrDA, LIN, SPI, UART/USART, USB
• Peripherals: DMA, PDR, POR, PVD, PWM, Temp Sensor, WDT
• Number Of I /o: 51
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Data Converters: A/D 16x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-LQFP
• For Use With: 497-10030 - STARTER KIT FOR STM32497-8853 - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL - KIT IAR KICKSTART STM32 CORTEXM3497-8512 - KIT STARTER FOR STM32F10XE MCU497-8505 - KIT STARTER FOR STM32F10XE MCU497-8304 - KIT STM32 MOTOR DRIVER BLDC497-6438 - BOARD EVALUTION FOR STM32 512K497-6289 - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U - BOARD EVAL MCBSTM32 + ULINK2497-6053 - KIT STARTER FOR STM32497-6052 - KIT STARTER FOR STM32497-6050 - KIT STARTER FOR STM32497-6049 - KIT EVALUATION LOW COST STM32497-6048 - BOARD EVALUATION FOR STM32497-6047 - KIT DEVELOPMENT FOR STM32497-5046 - KIT TOOL FOR ST7/UPSD/STR7 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 497-8309

STM32F102x4, STM32F102x6
Note:
Figure 18. Typical application with an 8 MHz crystal
1. R
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).
Table 22.
1. Refer to the note and caution paragraphs below the table, and to the application note AN2867 “Oscillator
2. The oscillator selection can be optimized in terms of supply current using an high quality resonator with
3.
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.
stray
t
SU(LSE)
Symbol
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
t
SU(LSE)
EXT
C
R
g
I
L1
(1)
2
m
is the pin capacitance and board or trace PCB-related capacitance. Typically, it is
F
value depends on the crystal characteristics.
and C
(3)
S
is the startup time measured from the moment it is enabled (by software) to a stabilized
value for example MSIV-TIN32.768 kHz. Refer to crystal manufacturer for more details
integrated capacitors
LSE oscillator characteristics (f
Feedback resistor
Recommended load capacitance
versus equivalent serial
resistance of the crystal (R
LSE driving current
Oscillator transconductance
Startup time
L2
it is recommended to use high-quality ceramic capacitors in the 5 pF to
Resonator with
L
C L2
C L1
has the following formula: C
Parameter
8 MH z
resonator
R EXT (1)
L1
Doc ID 15057 Rev 3
and C
S
L2
)
OSC_OU T
(2)
OSC_IN
.
LSE
V
R F
DD
V
Conditions
R
V
L
DD
S
= 32.768 kHz)
IN
is stabilized
= C
= 30 k
controlled
= 3.3 V
= V
Bias
gain
L1
SS
x C
L2
Table
/ (C
Electrical characteristics
Min
STM32F102xx
5
L1
22. In the application,
f HSE
+ C
Typ
5
3
L2
) + C
L1
ai14977b
Max
and C
1.4
15
stray
L2,
where
µA/V
Unit
M
41/69
pF
µA
s
are