STM32F103CBT6 datasheet(70/102 Pages) STMICROELECTRONICS

部件名	STM32F103CBT6

功能描述	Clock, reset and supply management

PDF	102 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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70 / 102 page

Electrical characteristics

STM32F103x8, STM32F103xB

70/102

Doc ID 13587 Rev 14

Figure 32.

I2C bus AC waveforms and measurement circuit

Measurement points are done at CMOS levels: 0.3VDD and 0.7VDD.

Table 41.

SCL frequency (fPCLK1= 36 MHz.,VDD = 3.3 V)

(1)(2)

RP = External pull-up resistance, fSCL = I

2C speed,

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

0x0168

0x0384

ai14133d

Start

SDA

100

4.7k

I²C bus

4.7k

100

VDD

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)

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