XETK-S21.0B - User’s Guide
26
Hardware Description
ETAS
• Minimum time interval 100
μ
s
• Maximum period duration 1 s
• Timer resolution 1
μ
s
The timers trigger the XETK in an asynchronous manner to the microcontroller
software. Variables assigned to a measurement raster using a timer trigger are
acquired from their original locations in RAM via JTAG.
4.13
Reset
The requirement for the XETK-S21.0 reset mechanism is to ensure that power-up
and power-down behavior of ECU is clean and smooth. The XETK-S21.0 nor-
mally drives /PORST low during XETK power up or upon INCA request.
The signals /PORST and /ESR0 of the microcontroller are used by the XETK-S21.0
to detect when the ECU is in reset.
The XETK-S21.0 senses the switched ECU power supply. This allows it to detect
when the ECU is off and forward this information to INCA. In addition, it allows
the XETK to enter the power save mode with the calibration system unplugged.
4.14
Pull CalWakeUp until Startup Handshake
The XETK has the ability to wake up the ECU by applying voltage to the Cal-
WakeUp pin of the ECU connector. This allows the XETK to configure a measure-
ment while the ECU is off.
When waking up the ECU via the CalWakeUp pin, it can be configured if the pin
is driven high until the microcontroller core voltage (VDDP) is high or if the pin
should be driven high until the start-up handshake between ECU and XETK is
complete.
Note
If variables are measured from ECC protected memories, the ECU software
must ensure the proper initialization of these locations. A time-out period can
be set in the XETK configuration to allow for the ECU to initialize the memories
before the measurement begins.
Содержание XETK-S21.0B
Страница 1: ...XETK S21 0B Emulator Probe for MPC57xx and EMU57xx MCU Family User s Guide ...
Страница 6: ...XETK S21 0B User s Guide 6 Contents ETAS ...
Страница 31: ...XETK S21 0B User s Guide 31 ETAS Installation ...
Страница 32: ...XETK S21 0B User s Guide 32 Installation ETAS ...
Страница 58: ...XETK S21 0B User s Guide 58 Cables and Accessories ETAS ...
Страница 64: ...XETK S21 0B User s Guide 64 ETAS Contact Addresses ETAS ...