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LPS22DF Scheda tecnica(PDF) 7 Page - STMicroelectronics

Il numero della parte LPS22DF
Spiegazioni elettronici  Low-power and high-precision MEMS nano pressure sensor: 260-1260 hPa absolute digital output barometer
PDF  54 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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LPS22DF Scheda tecnica(HTML) 7 Page - STMicroelectronics

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3.3.2
I²C - inter-IC control interface
Subject to general operating conditions for Vdd and TOP.
Table 6. I²C slave timing values
Symbol
Parameter
I²C fast mode(1)(2)
I²C fast mode+(1)(2)
Unit
Min
Max
Min
Max
f(SCL)
SCL clock frequency
0
400
0
1000
kHz
tw(SCLL)
SCL clock low time
1.3
0.5
µs
tw(SCLH)
SCL clock high time
0.6
0.26
tsu(SDA)
SDA setup time
100
50
ns
th(SDA)
SDA data hold time
0
0.9
0
µs
th(ST)
START/REPEATED START condition hold time
0.6
0.26
tsu(SR)
REPEATED START condition setup time
0.6
0.26
tsu(SP)
STOP condition setup time
0.6
0.26
tw(SP:SR)
Bus free time between STOP and START condition
1.3
0.5
Data valid time
0.9
0.45
Data valid acknowledge time
0.9
0.45
CB
Capacitive load for each bus line
400
550
pF
1. Data based on standard I²C protocol requirement, not tested in production.
2. Data for I²C fast mode and I²C fast mode+ have been evaluated by characterization, not tested in production
Figure 5. 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 0.3·Vdd_IO and 0.7·Vdd_IO for both ports.
LPS22DF
Communication interface characteristics
DS13316 - Rev 1
page 7/54



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