FS-935 Digi International, FS-935 Datasheet - Page 5

• Manufacturer Part Number: FS-935
• Description: JTAG-BOOSTER FOR IDT64145 3.3V
• Manufacturer: Digi International
• Series: Digi/FS Forthr
• Type: FLASHr

Specifications of FS-935

• Contents: Programmer and Associated Interface Software
• For Use With/related Products: IDT64145 3.3V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

JTAG-Booster for IDT 64145
1.2.
Connecting your PC to the target system
The JTAG-Booster can be plugged into standard parallel ports (LPT1-3) with a
DB25-Connector.
1
1
Élan
SC400
LPT1-3
Module Élan486
The target end of the cable has the following reference:
1
2*
3
4
5
6
7
8
TCK
GND
TMS
TRST#
NC
TDI
TDO
+3.3V
*PIN 2 can be detected by the white 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.
Since the JTAG-Booster operates with 5V, in addition a level shifter is
necessary to connect the JTAG-Booster to a target operating with 3.3 volts.
This level shifter must be ordered separately.
The IDT RC64145 does not have a TRST# pin. The reset of the JTAG interface
is connected (internally to the IDT RC64145) to the system reset (Pin
SYS_RST#). We recommend not to connect the system reset with the TRST#
pin of the JTAG connector. For more information see chapter 3.
“Implementation Information”
JTAG145a.doc
5