E981.07 Datasheet, PDF (20/46 Pages) ELMOS Semiconductor AG – Two independent operating channels

Two Channel Sensor Interface PSI5
ADVANCE PRODUCT INFORMATION JUL 26, 2011
5.1.4 Sync Pulse Generation
E981.07
Each data transmission is initiated by a synchronisation signal generated by the device. The MCU will provide a
trigger signal SAT_SYNC, which initiates the device to rise the voltage on the bus from typically 6.5V to typically
11.5 V (resp. 8V to 13V) slew rate controlled for a time of typically 23 μs. The Figure 5.1-3 shows the timing of
the sync pulse generation.
V
SAT_OUTX
Phase1
Sync
Start
Phase2
Sync
Slope
V_{SAT_OUT_X_MAX}
V
t2
V
TRIG
Phase3
Sync
Sustain
Upper boundary
Lower boundary
Phase4
Sync
Discharge
V
t0
V
SAT_OUT_X
t0
t
t2
TRIG
t
t3
t4
Figure 5.1-3 Synchronisation Pulse Timing
Parameter
Sync signal start
Sync signal sustain start
Sync signal sustain time
Discharge time limit
Sync rise time
Symbol
t0
t2
t3
t4
tSYNC_rise
Condition
@Vt0 =0.5V
@Vt2 =3.5V
Min.
Typ.
0
7
16
35
4.6
Max. Unit
μs
μs
μs
μs
μs
ELMOS Semiconductor AG
Data Sheet 20 / 45
QM-No.: 25DS0050E.00
This document contains information on a new product. ELMOS Semiconductor AG reserves the right to change specifications and information herein without notice.