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LIS331DL

MEMS motion sensor 3-axis - ±2g/±8g smart digital output “nano” accelerometer

STMicroelectronics 

LIS331DL

Mechanical and electrical specifications

2.3.2

I2C - Inter IC control interface

Subject to general operating conditions for Vdd and top.

Table 6.

Symbol

I2C slave timing values

Parameter

I2C Standard mode(1)

Min

Max

I2C Fast mode (1)

Min

Max

Unit

f(SCL)

SCL clock frequency

0

100

0

400

KHz

tw(SCLL)

SCL clock low time

4.7

tw(SCLH) SCL clock high time

4.0

1.3

µs

0.6

tsu(SDA)

SDA setup time

250

100

ns

th(SDA)

SDA data hold time

0(2)

3.45

0(2)

0.9

µs

tr(SDA) tr(SCL) SDA and SCL rise time

tf(SDA) tf(SCL) SDA and SCL fall time

1000

20 + 0.1Cb (3)

300

ns

300

20 + 0.1Cb (3)

300

th(ST)

START condition hold time

4

0.6

tsu(SR)

Repeated START condition

setup time

4.7

tsu(SP)

STOP condition setup time

4

0.6

µs

0.6

tw(SP:SR)

Bus free time between STOP

and START condition

4.7

1.3

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

2. A device must internally provide an hold time of at least 300ns for the SDA signal (referred to VIHmin of the SCL signal) to

bridge the undefined region of the falling edge of SCL

3. Cb = total capacitance of one bus line, in pF

Figure 4. I2C slave timing diagram (4)

START

REPEATED

START

SDA

tsu(SR)

tw(SP:SR)

START

tf(SDA)

SCL

tr(SDA)

tsu(SDA)

th(SDA)

tsu(SP)

STOP

th(ST) tw(SCLL)

tw(SCLH)

tr(SCL)

tf(SCL)

4. Measurement points are done at 0.2·Vdd_IO and 0.8·Vdd_IO, for both ports

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