STM32F407IGT7 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM32F407IGT7

ARM Cortex-M4 32b MCU+FPU, 210DMIPS, up to 1MB Flash/192+4KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 15 comm. interfaces & camera

STMicroelectronics 

STM32F405xx, STM32F407xx

Electrical characteristics

Symbol

Table 53. I2C characteristics (continued)

Parameter

Standard mode I2C(1)

Min

Max

Fast mode I2C(1)(2)

Min

Max

Unit

th(STA) Start condition hold time

4.0

-

0.6

-

tsu(STA)

Repeated Start condition

setup time

4.7

-

0.6

µs

-

tsu(STO) Stop condition setup time

4.0

-

0.6

-

μs

tw(STO:STA)

Stop to Start condition time

(bus free)

4.7

-

1.3

-

μs

Cb

Capacitive load for each bus

line

-

400

-

400

pF

1. Guaranteed by design, not tested in production.

2.

faPcChLieK1vemfuasstt

be at least 2 MHz to achieve

mode I2C frequencies, and a

standard mode I2C frequencies. It must

multiple of 10 MHz to reach the 400 kHz

be at least 4 MHz

maximum I2C fast

to

mode

clock.

3. The device must internally provide a hold time of at least 300 ns for the SDA signal in order to bridge the

undefined region of the falling edge of SCL.

4. The maximum data hold time has only to be met if the interface does not stretch the low period of SCL

signal.

Figure 39. I2C bus AC waveforms and measurement circuit

VDD_I2C VDD_I2C

I²C bus

RP

RP

RS

STM32Fxx

SDA

RS

SCL

S TAR T

SDA

tf(SDA)

tr(SDA)

tsu(SDA)

th(STA)

tw(SCLL)

th(SDA)

SCL

tw(SCLH)

tr(SCL)

tf(SCL)

1. Rs= series protection resistor.

2. Rp = external pull-up resistor.

3. VDD_I2C is the I2C bus power supply.

S T AR T REPEATED

tsu(STA)

S TAR T

S TOP

tw(STO:STA)

tsu(STO)

ai14979c

DocID022152 Rev 4

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