XETK-V2.0 - User’s Guide
16
ETAS
Introduction
The XETK-V2.0’s Nexus (JTAG) debug interface at 2.5 V or 3.3 V. The XETK-V2.0
performs measurement and calibration of variables as well as flashing via the
JTAG portion of the Nexus interface. Additionally the Nexus Auxiliary interface
can be used for high speed trace measurement.
The XETK-V2.0A/C provides a Synchronous RAM (SRAM) that can be used by the
ECU to store calibration or other ECU variables (XETK-V2.0A provides 2 MByte
SRAM, XETK-V2.0C provides 4 MByte SRAM). This SRAM is only accessible to the
XETK-V2.0A/C via the microcontroller’s Nexus (JTAG) debug interface. This inter-
face operates at 2.5 V or 3.3 V.
The XETK-V2.0 supports the standard full duplex 100Base-T Ethernet interface
and be connected directly or via ES51x/ES59x/ES600 modules to the PC. No addi-
tional ETAS modules are required for the access to the ECU. The XETK-V2.0 can
be used for rapid prototyping applications (bypass) as well as for measurement
and calibration applications.
3.2
Features
• Measurement Interface
– Nexus / JTAG interface (operates at 2.5 V or 3.3 V)
– Configurable JTAG interface clock speed: 20 MHz, 30 MHz, or
40 MHz
– Nexus Trace interface clock speed: up to 66 MHz
– Supports coldstart measurement mechanism
– Supports high speed measurement rasters with Nexus Trace (down to
10
μ
s)
– Hardware synchronization and time stamping
• Startup protocol for XETK / ECU synchronization
– DAI pins (all microcontrollers)
– Pinless via Nexus / JTAG
• Trigger interface
– 2 DAI triggers
– 32 Pinless triggers via Nexus / JTAG
– 4 triggers generated by internal timers
– 16 trace triggers
– 64 total measurement rasters
• Calibration interface
– XETK-V2.0A/C provides SRAM to be used for emulation data with a
configurable chip select
– XETK-V2.0A/C provides power for both the Microcontroller External
Bus Interface and the on board XETK RAM
– Microcontroller capability of re-mapping Flash to RAM emulation used
by ECU software
– Supports “Start on Working Page”
• Debugger interface
– XETK-V2.0 arbitration possible with "Lauterbach Power Trace"