LSM303D Datasheet, PDF (14/52 Pages) STMicroelectronics – Embedded temperature sensor

Module specifications
LSM303D
2.4.2
Sensor I²C - inter-IC control interface
Subject to general operating conditions for Vdd and Top.
Symbol
Table 7. I²C slave timing values
Parameter
I²C standard mode ⁽¹⁾
Min.
Max.
I²C fast mode ⁽¹⁾
Min.
Max.
f_(SCL)
SCL clock frequency
0
t_w(SCLL) SCL clock low time
4.7
t_w(SCLH) SCL clock high time
4.0
t_su(SDA)
SDA setup time
250
t_h(SDA)
SDA data hold time
0
t_r(SDA) t_r(SCL) SDA and SCL rise time
t_f(SDA) t_f(SCL) SDA and SCL fall time
t_h(ST)
START condition hold time
4
t_su(SR)
Repeated START condition
setup time
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
START
SDA
REPEATED
START
tsu(SR)
tw (SP:SR)
START
tf(SD A)
SCL
tr(SDA)
tsu(SDA)
th(SDA)
tsu(SP)
STO P
th(ST) tw (SCLL)
tw (SCLH)
tr(SCL)
tf(SCL)
Note:
Measurement points are done at 0.2·Vdd_IO and 0.8·Vdd_IO for both ports.
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