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TLE5014
GMR-Based Angle Sensor
SICI
Figure 6
Timing description of master bit
After receiving a bit from the master, the sensor answers by transmitting one bit:
•
the sensor transmits a "1" by pulling the SICI-line "low" for the time difference ∆T between "high" and
"low" level given by the received PWM signal (i.e. if a "0" was transmitted by the master, ∆T = T - 2*T
whereas if a "1" was transmitted by the master, ∆T = 2*T
•
the sensor transmits a "0" by keeping the line "high"
To read the bit transmitted by the sensor, the master has to check the level of the line after T
pulse) but before time ∆T has expired (recommended 80% of ∆T, see
Figure 7
Timing description of response bit from sensor
After receiving the response bit from the sensor, the master can pause for a time T
next bit. T
has to be shorter than the time-out limit (see
4
interface is reset.
Figure 8
User's Manual
T
0
T
1
0:
T
2
1:
ΔT
master pulls low
line is released
Δ T
0
1
T
3
shows an example communication between master and sensor.
V
DD
1
GND
ΔT = T – 2*T
ΔT = 2*T
- T)
2
Figure
7).
V
DD
GND
Master checks
response here
Table
11, interface reset time), otherwise the
32
1
- T
2
1
(master low
3
Master pulls low
Sensor pulls low
Line is released
before transmitting the
4
Rev. 1.0
2019-03-12
,
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