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STM32F102X8 데이터시트(PDF) 61 Page - STMicroelectronics

부품명 STM32F102X8
상세설명  Medium-density USB access line, ARM-based 32b MCU with 64/128KB Flash, USB FS, 6 timers, ADC & 8 com. interfaces
PDF  80 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32F102X8 데이터시트(HTML) 61 Page - STMicroelectronics

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STM32F102x8, STM32F102xB
Electrical characteristics
79
Figure 26. I2C bus AC waveforms and measurement circuit(1)
1. Measurement points are done at CMOS levels: 0.3VDD and 0.7VDD.
Table 40. SCL frequency (fPCLK1= 36 MHz, VDD_I2C = 3.3 V)(1)(2)
1. RP = External pull-up resistance, fSCL = I2C speed,
2. For speeds around 200 kHz, the tolerance on the achieved speed is of
±5%. For other speed ranges, the
tolerance on the achieved speed
±2%. These variations depend on the accuracy of the external
components used to design the application.
fSCL
(kHz)
I2C_CCR value
RP = 4.7 kΩ
400
0x801E
300
0x8028
200
0x803C
100
0x00B4
50
0x0168
20
0x0384
ai14133e
Start
SDA
I²C bus
VDD_I2C
VDD_I2C
STM32F10x
SDA
SCL
tf(SDA)
tr(SDA)
SCL
th(STA)
tw(SCLH)
tw(SCLL)
tsu(SDA)
tr(SCL)
tf(SCL)
th(SDA)
Start repeated
Start
tsu(STA)
tsu(STO)
Stop
tsu(STO:STA)
Rp
Rp
Rs
Rs



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