H3LIS331DL Datasheet, PDF (12/38 Pages) STMicroelectronics – MEMS motion sensor: low-power high-g 3-axis digital accelerometer

Mechanical and electrical specifications
H3LIS331DL
2.3.2
I²C - inter-IC control interface
Subject to general operating conditions for Vdd and Top.
Symbol
Table 6. I²C slave timing values
Parameter
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
0.01
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.
Figure 4. I²C slave timing diagram
Unit
KHz
μs
ns
μs
ns
μs
START
SDA
t_{f(SD A)}
t_r(SDA)
SCL
t_su(SDA)
th(SDA)
REPEATED
START
t_su(SR)
tw (SP:SR)
START
t_su(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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