ETAS XETK-S21.0B, User Manual

Page: 17 / 68

XETK-S21.0B - User’s Guide 17
ETAS Hardware Description
4 Hardware Description
In this chapter, the function blocks of the XETK-S21.0 are explained in detail.
4.1 Architecture
Fig. 4-1 shows the block diagram of the XETK-S21.0.
Fig. 4-1 XETK-S21.0 Architecture
While the microcontroller accesses the program data (not the program code) out
of the data emulation memory provided by the microcontroller, the content of
the data emulation memory can simultaneously be modified by the calibration
and development system through the XETK Ethernet interface. This process
enables adjustments of parameters, characteristic lines and maps through the
calibration and development system. Using an additional measurement data
memory area, the ECU microcontroller can provide data to the calibration and
development system by buffering the data (DISTAB13) and triggering the XETK
to read the data via JTAG. The XETK then reads, buffers, processes and sends this
measured data to the PC.
If no additional measurement data memory is available, the XETK-S21.0 can
alternatively read the data to be measured directly from the microcontroller’s
memory. This process is Triggered Direct Measurement (TDM) with DISTAB13.
The 100 Mbit/s XETK Ethernet interface provides communication with the PC.
The power supply for the XETK-S21.0 is provided by a switch mode power sup-
ply, to minimize power dissipation.
CALWAKEUP
XCP on
Ethernet
Interface
SRAM
System
Functions
Arbiter
100
MBit/s
Ethernet
Phyte
r
Ethernet
Phy
Automatic
Power On
Ethernet
Traffic
Detection
Ethernet
Traffic
Detection
Power
Supply
Monitoring
ECU
Reset
&
Power
Control
DMA
MCU
Core
Ethernet
MAC
Measurement
& Calibration
Unit
ECU
Access
Unit
Serial Flash
Configuration
&
Manufacturing
Data
Time
Sync.
JTAG Signals
WD_DIS
Power
Supply
4.3V...36V
Standby
Supply
4.3V...36V
Power
Debugger
Connector
JTAG
Arbitration
Buffers
ECU Interface
Connectors
ECU
Buffers
ECU
SBRAM
POWER
SUPPLY
7-Pin JST
12-Pin ERNI
JTAG
1.25V
WD_DIS
U-BATT Input
Debugger Signals
JTAG, WD_DIS, Resets, VCC
Sense
ECU &
SBRAM
Power
Supplies