
XETK-V2.0 - User’s Guide
33
ETAS
Hardware Description
4.10.2
XETK-V2.0B
The watchdog disable control signal is available on the Samtec connector on
signal TOOL_IO2 (pin 28).
When the XETK-V2.0B is configured to use this signal (Configuration parameter
"ECU Watchdog Control" set to "Disabled"), the signal TOOL_IO2 is set to logic
high. Logic high is defined within the section "Electrical Characteristics"
on page 56. When the "ECU Watchdog Control" is set to "Controlled by ECU"
or "Enabled", the TOOL_IO2 pin is not driven by the XETK-V2.0B (high-Z).
XETK-V2.0B
ECU
TOOL_IO2
Watchdog
1= disable
0= enable
XETK Configuration Tool /
ProF (BDF):
ECU Watchdog Control
10k
GND
XETK
System
Controller
75k
GND
TOOL_IO2
Fig. 4-15
Equivalent Circuitry of the XETK-V2.0B WDT Interface
The ECU must be equipped with a Watchdog disable circuit when this feature
is required.
4.11
Startup and Triggering with DAI Pins
4.11.1
XETK-V2.0A/C DAI Interface via BGA VertiCal Base Boards
When using BGA VertiCal Base Boards additional circuitry and a VertiCal Base
Board with optional balls must be present on the ECU PCB to use the DAI inter-
face of the XETK-V2.0A/C. The XETK-V2.0A/C uses the same DAI Interface cir-
cuitry as other serial (X)ETKs; however, the connection between the
microcontroller and XETK is made using the optional balls of the BGA VertiCal
Base Board.
For ECUs with BGA adapters VertiCal Base Boards with optional balls are
required to use the DAI startup/ triggering and Watchdog Timer Disable fea-
tures of the XETK-V2.0A/C.
The DAI circuitry of the ECU is connected to the XETK-V2.0A/C using the balls
TOOL_IO0 (DAI1) and TOOL_IO1(DAI2) which are present on the BGA VertiCal
Base Board equipped with optional balls. Refer to Fig. 4-16 for the required cir-
cuitry and VertiCal Base Board package specific ball locations.
CAUTION!
Risk of damaging the XETK due to over voltage on TOOL_IO2!
The
XETK-V2.0
signal TOOL_IO2 is not 5 V tolerant, refer to the sec-
tion "Electrical Characteristics" on page 56 for the complete electrical
specification of the TOOL_IO2 pin
.
Note
Note