STM8S207MB datasheet(80/103 Pages) STMICROELECTRONICS

80 / 103 page

Electrical characteristics

STM8S207xx, STM8S208xx

80/103

Doc ID 14733 Rev 12

10.3.9

I2C interface characteristics

Table 43.

I2C characteristics

Symbol

Parameter

Standard mode I2C Fast mode I2C(1)

fMASTER, must be at least 8 MHz to achieve max fast I

2C speed (400kHz)

Unit

Min(2)

Data based on standard I2C protocol requirement, not tested in production

Max(2)

Min(2)

Max(2)

tw(SCLL)

SCL clock low time

4.7

1.3

µs

tw(SCLH)

SCL clock high time

4.0

0.6

tsu(SDA)

SDA setup time

250

100

th(SDA)

SDA data hold time

0(3)

The maximum hold time of the start condition has only to be met if the interface does not stretch the low

time

0(4)

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

900(3)

tr(SDA)

tr(SCL)

SDA and SCL rise time

1000

300

tf(SDA)

tf(SCL)

SDA and SCL fall time

300

th(STA)

START condition hold time

4.0

0.6

µs

tsu(STA)

Repeated START condition setup time

4.7

0.6

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

Capacitive load for each bus line

400

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