
JTAG-Booster for IBM PPC405
1.4.
Connecting your PC to the target system
The JTAG-Booster can be plugged into standard parallel ports (LPT1-3) with a
DB25-Connector.
LPT1-3
1
1
élan
SC400
Module élan486
The target end of the cable has the following reference:
1
TCK
2*
GND
3
TMS
4
TRST#
5
NC
6
TDI
7
TDO
8
+3.3V
*PIN 2 can be detected by the thick cable.
To connect your design to the JTAG-BOOSTER you need a single row berg
connector with a spacing of 2.54mm on your PCB. The names refer to the
target: Pin 7 is the target’s TDO pin and is connected to the JTAG-Booster’s TDI
pin.
The 3.3V version of the JTAG-Booster (FS part number 285) is delivered
together with this package. Don’t use the 5V version of the JTAG-Booster (FS
part number 227) with a 3.3V target. Don’t apply 5V to the 3.3V version of the
JTAG-Booster!
Your target must be able to power the JTAG-Booster, it draws about 100mA.
Before you start the program, the JTAG-BOOSTER must be plugged to a
parallel interface of your PC and to the 8 pin JTAG connector on the target.
JTAG_PPC405a.doc
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