ETAS FlexRay ES920.1, User Manual, Page: 20 / 44

ES920.1 - User’s Guide 20
ETAS Functional Description
Fig. 4 - 2 Operating Modes
For more detailed information on the operating modes refer to the ES910 man -
ual.
4.3.1 “Wake Up” Function
“Wake Up” Conditions
There are two different “Wake Up” conditions in the system:
• when FlexRay traffic is detected or
• when the FlexRay “Wake Up” pattern is detected.
Definition of the FlexRay “Wake Up” Pattern.
If the ES920.1 detects the “Wake Up” pattern defined in Fig. 4 - 3 on page 20 ,
the ES910/ ES920.1 system changes from “Standby” to “On”.
Fig. 4 - 3 Definition of the “Wake Up Pattern”
Note
The
ON/AUTO
switch of the ES910 must be switched to
AUTO
for this func -
tion to be able to be used.
ON
OFF
STANDBY
Sleep
Wake-Up
Power Connect Power Disconnect
Differential
Bus
Voltage
Idle
t
1
t
0
t
0
DATA_0 DATA_1 DATA_0
DATA_0
DATA_1