参数资料
型号: STM32F103VEH6
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 72 MHz, RISC MICROCONTROLLER, PBGA100
封装: 10 X 10 MM, 0.50 MM PITCH, ROHS COMPLIANT, LFBGA-100
文件页数: 100/115页
文件大小: 1225K
代理商: STM32F103VEH6
STM32F103xC, STM32F103xD, STM32F103xE
Electrical characteristics
Figure 42.
I2C bus AC waveforms and measurement circuit
1.
Measurement points are done at CMOS levels: 0.3VDD and 0.7VDD.
Table 51.
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
±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
ai14149b
START
SDA
100
Ω
4.7k
Ω
I2C bus
4.7k
Ω
100
Ω
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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