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STM32F103RBH7TR ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 63 Page - STMicroelectronics

๋ถ€ํ’ˆ๋ช… STM32F103RBH7TR
์ƒ์„ธ๋‚ด์šฉ  Medium-density performance line ARM-based 32-bit MCU with 64 or 128 KB Flash, USB, CAN, 7 timers, 2 ADCs, 9 communication interfaces
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STM32F103RBH7TR ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 63 Page - STMicroelectronics

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STM32F103x8, STM32F103xB
Electrical characteristics
Doc ID 13587 Rev 11
63/92
Figure 26.
I2C bus AC waveforms and measurement circuit
1.
Measurement points are done at CMOS levels: 0.3VDD and 0.7VDD.
Table 40.
SCL frequency (fPCLK1= 36 MHz.,VDD = 3.3 V)
(1)(2)
1.
RP = External pull-up resistance, fSCL = I
2C speed,
2.
For speeds around 200 kHz, the tolerance on the achieved speed is of
๏‚ฑ5%. For other speed ranges, the
tolerance on the achieved speed
๏‚ฑ2%. These variations depend on the accuracy of the external
components used to design the application.
fSCL (kHz)
I2C_CCR value
RP = 4.7 k๏—
400
0x801E
300
0x8028
200
0x803C
100
0x00B4
50
0x0168
20
0x0384
ai14149b
START
SDA
100
ฮฉ
4.7k
ฮฉ
I2C bus
4.7k
ฮฉ
100
ฮฉ
VDD
VDD
STM32F103xx
SDA
SCL
tf(SDA)
tr(SDA)
SCL
th(STA)
tw(SCKH)
tw(SCKL)
tsu(SDA)
tr(SCK)
tf(SCK)
th(SDA)
S TART REPEATED
START
tsu(STA)
tsu(STO)
S TOP
tsu(STA:STO)


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