STM32F101X6 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM32F101X6

Low-density access line, ARM-based 32-bit MCU with 16 or 32 KB Flash, 5 timers, ADC and 4 communication interfaces

STMicroelectronics 

Electrical characteristics

STM32F101x4, STM32F101x6

Figure 28. I2C bus AC waveforms and measurement circuit(1)

VDD

VDD

I²C bus

4 .7 kΩ 4 .7 kΩ

100 Ω

100 Ω

STM32F10x

SDA

SCL

SD A

tf(SDA)

Start

Start repeated

tsu(STA)

Start

tr(SDA)

tsu(SDA)

th(STA)

tw(SCLL)

th(SDA)

Stop

tsu(STO:STA)

SCL

tw(SCLH)

tr(SCL)

tf(SCL)

tsu(STO)

ai14133d

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

Table 40.

SCL frequency (fPCLK1= MHz, VDD = 3.3 V)(1)(2)

fSCL (kHz)

I2C_CCR value

RP = 4.7 kΩ

400

0x801E

300

0x8028

200

0x803C

100

0x00B4

50

0x0168

20

0x0384

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.

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Doc ID 15058 Rev 5

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