LPS25HB Datasheet, PDF (11/40 Pages) STMicroelectronics – MEMS pressure sensor: 260-1260 hPa absolute digital output barometer

LPS25HB
Mechanical and electrical specifications
2.3.2
I²C - inter-IC control interface
Subject to general operating conditions for Vdd and T_OP.
Symbol
Table 6. I²C slave timing values
Parameter (1)
I²C standard mode⁽¹⁾
Min
Max
I²C fast mode⁽¹⁾
Min
Max
f_(SCL)
t_w(SCLL)
t_w(SCLH)
t_su(SDA)
t_h(SDA)
t_r(SDA) t_r(SCL)
t_f(SDA) t_f(SCL)
t_h(ST)
t_su(SR)
SCL clock frequency
SCL clock low time
SCL clock high time
SDA setup time
SDA data hold time
SDA and SCL rise time
SDA and SCL fall time
START condition hold time
Repeated START condition
setup time
0
4.7
4.0
250
0.01
4
4.7
100
0
400
1.3
0.6
100
3.45
0
0.9
1000
20 + 0.1C_b(2)
300
300
20 + 0.1C_b(2)
300
0.6
0.6
t_su(SP)
STOP condition setup time
4
0.6
t_w(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. C_b = total capacitance of one bus line, in pF.
Unit
kHz
µs
ns
µs
ns
µs
Figure 4. I²C slave timing diagram
SDA
START
REPEATED
START
t_su(SR)
tw(SP:SR)
START
t_f(SDA)
SCL
t_r(SDA)
t_su(SDA)
th(SDA)
t_su(SP)
STOP
Note:
th(ST) tw(SCLL)
tw(SCLH)
tr(SCL)
tf(SCL)
Measurement points are done at 0.2·Vdd_IO and 0.8·Vdd_IO, for both ports.
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