LPS33K datasheet(5/31 Pages) STMICROELECTRONICS

部件名	LPS33K

功能描述	MEMS pressure sensor: 300-1200 hPa absolute digital output barometer with potted gel package

PDF	31 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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2.3

Communication interface characteristics

2.3.1

I²C - inter-IC control interface

Subject to general operating conditions for Vdd and TOP.

Table 5. I²C slave timing values

Symbol

Parameter

I²C standard mode(1)

I²C fast mode(1)

Unit

Min.

Max

Min.

Max.

f(SCL)

SCL clock frequency

100

400

kHz

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

3.45

0.9

µs

th(ST)

START condition hold time

0.6

µs

tsu(SR)

Repeated START condition setup time

4.7

0.6

tsu(SP)

STOP condition setup time

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.

Figure 3. I²C slave timing diagram

SDA

SCL

tsu(SP)

tw(SCLL)

tsu(SDA)

tsu(SR)

th(ST)

tw(SCLH)

th(SDA)

tw(SP:SR)

START

REPEATED

START

STOP

START

Note:

Measurement points are done at 0.2·VDD and 0.8·VDD for both ports.

LPS33K

Communication interface characteristics

DS12817 - Rev 3

page 5/31

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