STM32F205VE View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM32F205VE

ARM-based 32-bit MCU, 150DMIPs, up to 1 MB Flash/128+4KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 15 comm. interfaces & camera

STMicroelectronics 

Electrical characteristics

Figure 38. I2C bus AC waveforms and measurement circuit

VDD

VDD

I²C bus

4 .7 kΩ 4 .7 kΩ

100 Ω

100 Ω

STM32Fxx

SDA

SCL

STM32F20xxx

SD A

tf(SDA)

S TART

S TART REPEATED

tsu(STA)

S TART

tr(SDA)

tsu(SDA)

th(STA)

tw(SCLL)

th(SDA)

S TOP

tw(STO:STA)

SCL

tw(SCLH)

tr(SCL)

tf(SCL)

tsu(STO)

ai14979b

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

Table 51.

SCL frequency (fPCLK1= 30 MHz.,VDD = 3.3 V)(1)(2)

fSCL (kHz)

I2C_CCR value

RP = 4.7 kΩ

400

0x8019

300

0x8021

200

0x8032

100

0x0096

50

0x012C

20

0x02EE

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.

104/177

Doc ID 15818 Rev 9

Share Link: