Table of Contents
Advertisement
TLE5014
GMR-Based Angle Sensor
SICI
T
T
1
0 from master
master pulls low
sensor pulls low
line is released
Figure 8
SICI communication example
The transmission rate of the interface is determined by the width T of the PWM signal sent by the master. A
maximum transmission speed of 240 kbit/s can be reached for T = 2 µs. Lowering the transmission rate
generally increases the robustness of the communication in distorted environments and/or with high
capacitive loads on the line. The optimum communication speed thus depends on the application circuitry.
The timing specification of the SICI interface is given in
Table 11
SICI interface timing and level specification
Parameter
Master PWM period
Master low time to transmit "0" T
Master low time to transmit "1" T
Time difference between master
low and high level
Master low pulse after PWM bit
Master pause time after sensor
bit response
Interface reset time
Input signal low level
Input signal high level
Output signal low level
SICI line pull-up resistor
Wait time between transmitted
16-bit words
1) Achievable transmission rate (minimum master PWM period) depends on parasitic capacities in external circuitry.
2) Verified by design/characterization.
3) Rise/fall times due to parasitic capacitances on the line have to be added.
4) Max. time for reset calculated for worst case interruption of SICI transmission
User's Manual
ΔT
T
4
1 from sensor
Symbol
Min.
1)
T
2
0.2*T
1
0.66*T
2
∆T
0.33*T
T
0.4
3
T
0.75*T
4
T
–
Res
V
–
low,in
V
0.7*V
high,in
DD
V
–
low,in
R
1
pu
t
1
delay
ΔT
T
T
2
3
1 from master
0 from sensor
Table
11.
Values
Unit Note or Test Condition
Typ.
Max.
–
980
µs
–
0.33*T
µs
–
0.8*T
µs
–
0.6*T
µs
–
0.25*T
µs
–
810
µs
820
1640
µs
–
0.3*V
V
DD
–
–
V
–
0.9
V
–
–
kΩ
–
–
µs
33
V
DD
GND
Determines interface
2)
transmission rate
2)
2)
∆T = T - 2 * T
; for "0"
1
2)
∆T = 2 * T
- T; for "1"
2
2)3)
2)3)
2)4)
2)
2)
2)
2)
Rev. 1.0
2019-03-12
Advertisement
Table of Contents
