XETK-S21.0B - User’s Guide
24
Hardware Description
ETAS
4.9
JTAG Interface
Fig. 4-7
Equivalent Circuitry of the ECU JTAG Interface (ECU)
The ECU part of the JTAG XETK interface is depicted in Fig. 4-7.
The XETK-S21.0 incorporates 22 Ohm series resistors for the TMS, TCK, TDI and
/TRST lines on the ECU interface. Hence, no additional termination resistors are
required on the ECU for these signals.
Additionally, if a pull down resistor is present on the line /TRST, the ECU must use
a value no smaller than 10K ohm as shown in Fig. 4-7 on page 24.
XETK
ETAI10
ETAI5
or
ETAI6
or
ETAI8
/TRST
TMS
/PORST
>=
1
0
k
Ubatt
GND
CAL WAKEUP
(12V)
VDDPSTBY
(1,25V)
(I/O)
TDO
/TRST
/WGDIS
TCK
TDI
TDO
GND
TMS
/PORST
VDDP
(Sense)
/RSTOUT
TCK
ESR0
1
2
9
10
VD
D
SRA
M
TDI
1.
XETK:
supply
and
monitor
the
voltage
of
the
ED
RAM
R
XETK
=
0
R
EC
U
=
0
2.
ECU:
supply
the
voltage
of
the
ED
RAM
OR
permanent
power
supply
VDDPSTBY
sense
(I)
2.XETK:
monitor
the
voltage
of
the
ED
RAM
Power
supply
of
the
ED
RAM:
Option
1:
provided
by
XETK
Option
2:
provided
by
ECU
ECU
JDP
57xx
/WGDIS
circuit
Summary of Contents for XETK-S21.0B
Page 1: ...XETK S21 0B Emulator Probe for MPC57xx and EMU57xx MCU Family User s Guide ...
Page 6: ...XETK S21 0B User s Guide 6 Contents ETAS ...
Page 31: ...XETK S21 0B User s Guide 31 ETAS Installation ...
Page 32: ...XETK S21 0B User s Guide 32 Installation ETAS ...
Page 58: ...XETK S21 0B User s Guide 58 Cables and Accessories ETAS ...
Page 64: ...XETK S21 0B User s Guide 64 ETAS Contact Addresses ETAS ...
