LIS331DLTR(2007) Ver la hoja de datos (PDF) - STMicroelectronics

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LIS331DLTR
(Rev.:2007)

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

STMicroelectronics 

Mechanical and electrical specifications

LIS331DL

2.3.2

I2C interface

Subject to general operating conditions for Vdd and top.

Table 5.

Symbol

I2C Slave timing values

Parameter

I2C standard mode (1)

Min

Max

f(SCL)

SCL clock frequency

0

100

tw(SCLL)

SCL clock low time

4.7

tw(SCLH) SCL clock high time

4.0

tsu(SDA)

th(SDA)

SDA setup time

SDA data hold time

250

0

3.45(2)

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

1000

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

300

th(ST)

START condition hold time

4

tsu(SR)

Repeated START condition

setup time

4.7

tsu(SP)

STOP condition setup time

4

tw(SP:SR)

Bus free time between STOP

and START condition

4.7

I2C fast mode (1)

Min

Max

0

400

1.3

0.6

100

0

20 + 0.1Cb (3)

20 + 0.1Cb (3)

0.6

0.9(2)

300

300

0.6

0.6

1.3

Unit

KHz

µs

ns

µs

ns

µs

Figure 5. I2C slave timing diagram (4)

START

SDA

REPEATED

START

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)

Note: 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

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

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