
XETK-V1.0 - User’s Guide
25
ETAS
Hardware Description
4.8
Power Supply
CON2
CON3
Fig. 4-10
Power Supply Connectors CON2 and CON3
The XETK-V1.0 needs a permanent power supply. It is powered directly from the
car battery. The input voltage may vary between 4.3 V and 18 V.
Fig. 4-11
Power Supply monitoring
The ECU voltage VCC (VDDE2/3) is monitored by the ETK to recognize whether
the ECU is switched on or off. In case of higher input voltages to the ETK an
additional voltage converter is required. All necessary voltages are created
through switching power supplies which minimizes heat build-up. The power
supply of the ECU is not affected by the XETK-V1.0. An automatic switch ensures
that the power supply of the XETK-V1.0 is automatically switched on and off.
Fig. 4-12
Power Supply Connector CON2
The XETK-V1.0 can be supplied with power through the 2-pin power supply con-
nector CON2.
ECU Pow er
Supply
M icro-
cont roller
ETK
Car Bat t ery
UBATT
VCC
VCC
ECU
CON2
CON4
CON1