參數(shù)資料
型號(hào)： STM32F102RBT6TR
廠商： STMICROELECTRONICS
元件分類： 微控制器/微處理器
英文描述： 32-BIT, FLASH, 16 MHz, RISC MICROCONTROLLER, PQFP64
封裝： 10 X 10 MM, 0.50 MM PITCH, ROHS COMPLIANT, LQFP-64
文件頁(yè)數(shù)： 35/69頁(yè)
文件大?。?/td> 805K
代理商： STM32F102RBT6TR
Electrical characteristics
STM32F102x8, STM32F102xB
High-speed external clock generated from a crystal/ceramic resonator
The high-speed external (HSE) clock can be supplied with a 4 to 16 MHz crystal/ceramic
resonator oscillator. All the information given in this paragraph are based on characterization
results obtained with typical external components specified in Table 21. In the application,
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).
Figure 17.
Typical application with an 8 MHz crystal
1.
REXT value depends on the crystal characteristics. Typical value is in the range of 5 to 6RS.
Table 21.
HSE 4-16 MHz oscillator characteristics(1)(2)
1.
Resonator characteristics given by the crystal/ceramic resonator manufacturer.
2.
Based on characterization results, not tested in production.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fOSC_IN
Oscillator frequency
4
8
16
MHz
RF
Feedback resistor
200
k
Ω
CL1
CL2
(3)
3.
For CL1 and CL2 it is recommended to use high-quality ceramic capacitors in the 5 pF to 25 pF range (typ.),
designed for high-frequency applications, and selected to match the requirements of the crystal or
resonator. CL1 and CL2, are usually the same size. The crystal manufacturer typically specifies a load
capacitance which is the series combination of CL1 and CL2. PCB and MCU pin capacitance must be
included (10 pF can be used as a rough estimate of the combined pin and board capacitance) when sizing
CL1 and CL2.
Recommended load capacitance
versus equivalent serial
resistance of the crystal (RS)
(4)
4.
The relatively low value of the RF resistor offers a good protection against issues resulting from use in a
humid environment, due to the induced leakage and the bias condition change. However, it is
recommended to take this point into account if the MCU is used in tough humidity conditions.
RS = 30 Ω
30
pF
i2
HSE driving current
VDD = 3.3 V
VIN = VSS with 30 pF load
1mA
gm
Oscillator transconductance
Startup
25
mA/V
tSU(HSE)
(5)
5.
tSU(HSE) is the startup time measured from the moment it is enabled (by software) to a stabilized 8 MHz
oscillation is reached. This value is measured for a standard crystal resonator and it can vary significantly
with the crystal manufacturer
Startup time
VDD is stabilized
2
ms
ai14977b
OSC_OU T
OSC_IN
fHSE
CL1
RF
STM32F102xx
8 MH z
resonator
Bias
controlled
gain
REXT(1)
CL2
Resonator with
integrated capacitors
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相關(guān)代理商/技術(shù)參數(shù)
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STM32F102X6 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Low-density USB access line, ARM-based 32-bit MCU with 16/32 KB Flash, USB FS interface, 5 timers, ADC & 5 communication interfaces
STM32F102x8 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Medium-density USB access line,ARM-based 32b MCU with 64/128KB Flash,USB FS interface,6 timers, ADC&8 com. interfaces
STM32F102xB 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Medium-density USB access line,ARM-based 32b MCU with 64/128KB Flash,USB FS interface,6 timers, ADC&8 com. interfaces
STM32F1038 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Medium-density performance line ARM-based 32-bit MCU with 64 or 128 KB Flash, USB, CAN, 7 timers, 2 ADCs, 9 com. interfaces
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