ETAS
Hardware Description
BR_XETK-S3.0
-
User Guide
23
4.6
DAP Interface
Fig.
4
-
7
Equivalent Circuitry of the ECU DAP Interface (ECU)
The BR_XETK-S3.0 operates the Device Access Port (DAP) interface in the 2-pin
or in the 3-pin DAP mode.
The XETK hardware incorporates 22 Ohm series termination resistors for the
output ports DAP0, DAP1, DAP2 and /TRST.
Similar termination should be considered on the ECU board - depending both
on the layout and on the DAP interface clock rate.
NOTE
Power Supply of VDDSRAM: Use only with supported controllers
BR_XETK
ETAM8
ETAM2
/ TRST
DAP1
/ PORST
Ubatt
GND
CAL WAKEUP
(12V)
VDDPSTBY
DAP2
/TRST
/ WGDIS
DAP0
TDI
DAP2
GND
DAP1
/PORST
VDDP
(Sense)
/ RSTOUT
DAP0
ESR0
1
2
9
10
VD
D
SR
A
M
TDI
XETK: supply
and
monitor
the voltage of the ED RAM
R
XE
T
K
=
0
permanent power supply
Power supply of the ED RAM
provided by XETK
ECU
/ WGDIS circuit
Aurix
