STM32F412RGU7TR datasheet(131/201 Pages) STMICROELECTRONICS

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STM32F412xE/G

Electrical characteristics

166

FMPI2C characteristics

The following table presents FMPI2C characteristics.

Refer also to Section 6.3.16: I/O port characteristics for more details on the input/output

function characteristics (SDA and SCL).

Table 64. FMPI2C characteristics(1)

Parameter

Standard mode

Fast mode

Fast+ mode

Unit

Min

Max

Min

Max

Min

Max

fFMPI2CC

FMPI2CCLK frequency

µs

tw(SCLL)

SCL clock low time

4.7

1.3

0.5

tw(SCLH)

SCL clock high time

4.0

0.6

0.26

tsu(SDA)

SDA setup time

0.25

0.10

0.05

tH(SDA)

SDA data hold time

tv(SDA,ACK) Data, ACK valid time

3.45

0.9

0.45

tr(SDA)

tr(SCL)

SDA and SCL rise time

1.0

0.30

0.12

tf(SDA)

tf(SCL)

SDA and SCL fall time

0.30

0.12

th(STA)

Start condition hold time

0.6

0.26

tsu(STA)

Repeated Start condition

setup time

4.7

0.6

0.26

tsu(STO)

Stop condition setup time

0.6

0.26

tw(STO:STA)

Stop to Start condition time

(bus free)

4.7

1.3

0.5

tSP

Pulse width of the spikes that

are suppressed by the

analog filter for standard and

fast mode

0.05

0.1

0.05

0.1

Capacitive load for each bus

Line

400

550(2)

1. Based on characterization results, not tested in production.

2. Can be limited. Maximum supported value can be retrieved by referring to the following formulas:

tr(SDA/SCL) = 0.8473 x Rp x Cload

Rp(min) = (VDD -VOL(max)) / IOL(max)

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