702560 Spectrum Digital Inc, 702560 Datasheet - Page 29

• Manufacturer Part Number: 702560
• Description: XDS560R USB JTAG Emulator With 20 Pin CTI JTAG Header
• Manufacturer: Spectrum Digital Inc
• Type: USB JTAG Emulatorr

Specifications of 702560

• Contents: Board, Cable
• Ic Product Type: USB JTAG Emulator
• Kit Contents: XDS560R USB JTAG Emulator With CTI JTAG Header, CDROM With Drivers, USB Cable
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: TI DSPs and JTAG Microcontrollers
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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minimize signal crosstalk and signal skew. The designer must also
The target board designer should use good design practices to
take into account any propagation delays of these signals and the
effect that they will have on the timing of the emulation.
provide a signal rise time of less than 10 us. A 4.7 kW resistor is suggested for most
applications.
hold these signals at a known value when the emulator is not connected. A resistor
value of 4.7 kW or greater is suggested.
TCK_RET signals), you may have to employ special care when routing the PWB
trace. You also may have to use termination scheme, which is appropriate for your
design to match the trace impedance. The emulator pod provides optional internal
parallel terminators on the TCK_RET and TDO. TMS and TDI provide fixed series
termination.
sufficient current to all target devices.
board. Such considerations include signal loading of vias and the like.
The input buffers for TMS and TDI should have pull-up resistors connected to V
Since TRST is an asynchronous signal, it should be buffered as needed to insure
The EMU0 and EMU1 signals must have pull-up resistors connected to V
To have high-quality signals (especially the processor TCK and the emulator
Additional considerations should be taken into account when designing a target
CAUTION
Vcc I/O
GND
10
12
5
4
6
8
Importance of Good Design Practices
TVD
GND
GND
GND
GND
GND
Figure 3-6, Buffered Signal Connections
Emulation Header
TCK_RET
EMU0
EMU1
TRST
TMS
TDO
TCK
TDI
14
13
11
2
1
9
3
7
Greater than 6 Inches
Vcc I/O
TMS
TDI
TCK
EMU0
EMU1
TRST
TDO
Spectrum Digital, Inc
Target Device
CC
to
CC
3-11
to