LIS3DSHTR Datasheet, PDF (15/53 Pages) STMicroelectronics – MEMS digital output motion sensor ultra low-power high performance three-axis “nano” accelerometer

LIS3DSH
Mechanical and electrical specifications
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 standard mode ⁽¹⁾
Min.
Max.
f_(SCL)
t_w(SCLL)
t_w(SCLH)
t_su(SDA)
t_h(SDA)
SCL clock frequency
SCL clock low time
SCL clock high time
SDA setup time
SDA data hold time
0
100
4.7
4.0
250
0.01
3.45
t_r(SDA) t_r(SCL) SDA and SCL rise time
1000
t_f(SDA) t_f(SCL) SDA and SCL fall time
300
t_h(ST)
START condition hold time
4
t_su(SR)
Repeated START condition
setup time
4.7
t_su(SP)
STOP condition setup time
4
t_w(SP:SR)
Bus free time between STOP
and START condition
4.7
1. Data based on standard I²C protocol requirement, not tested in production.
2. Cb = total capacitance of one bus line, in pF.
I²C fast mode ⁽¹⁾
Min.
Max.
0
400
1.3
0.6
100
0.01
0.9
20 + 0.1C_b ⁽²⁾
300
20 + 0.1C_b ⁽²⁾
300
0.6
0.6
0.6
1.3
Unit
kHz
µs
ns
µs
ns
µs
Figure 4. I²C slave timing diagram ^(d)
START
SDA
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
th(ST) tw(SCLL)
tw(SCLH)
tr(SCL)
tf(SCL)
d. Measurement points are done at 0.2·Vdd_IO and 0.8·Vdd_IO, for both ports.
Doc ID 022405 Rev 1
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