ETAS ETK-T2.2, User Manual

Page: 18 / 62

ETAS Hardware Description
ETK-T2.2 User Guide 18
4.4 Microcontroller Interface
The whole microcontroller interface to the calibration and development system
memories has a 32 bit wide data bus and uses only one chip select for read and
write accesses.
The microcontroller can read and write its data directly from or to the data emu
-
lation and measurement data memory. Fig. 4 - 2 on page 18 and Fig. 4 - 3
on page 18 show an overview of the system with "on chip" Flash and RAM and
external Flash and RAM memory. It also show the possibilities to access the
different memories with its chip selects. The chip select of the data emulation
and measurement data memory can be choosen (/CS1, /CS2, /CS3 or /
CSCOMB) by soldering the respective bridge on the PCB (see 4.15 "Chip Select
Configuration Bridge").
Fig. 4 - 2 ETK-T2.2A, ETK-T2.2D: internal and external Memory
ETK-T2A
M icrocont roller
(TriCore)
Int ernal Memory
/SGCS
Data
Emulat ion
and
M easurement
Memory
ECU
XTAL
Pin /CS0 soldered to /CSx
/CE
Ext ernal FLASH
(optional)
VCC, GND, Port s, Analog, et c.
EXTAL
XTAL
CPU Adapt er
/CS0
/CS1
/CS2
/CS3
/CSCOM B
HWCFG_ECU