702572 Spectrum Digital Inc, 702572 Datasheet - Page 28

• Manufacturer Part Number: 702572
• Description: XDS560R Target Adapter Cable For 14 Pin JTAG Header
• Manufacturer: Spectrum Digital Inc

Specifications of 702572

• Accessory Type: Target Adapter
• Features: Compatible With XDS510USB PLUS / XDS560R From Spectrum Digital, Includes 14 Pin JTAG Header
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XDS510USB PLUS Or XDS560R USB JTAG Emulator
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q5346474

Spectrum Digital, Inc
3.5 Connections Between the Emulator and the Target System
3.5.1 Buffering Signals
3-10
It is extremely important to provide high-quality signals between the emulator and the
JTAG target system. Depending upon the situation, you must supply the correct signal
buffering, test clock inputs, and multiple processor interconnections to ensure proper
emulator and target system operation.
Signals applied to the EMU0 and EMU1 pins on the JTAG target device can be either
an input or an output (I/O). In general, these two pins are used as both input and output
in multiprocessor systems to handle global run/stop operations.
If the distance between the emulation header and the JTAG target device is greater
than six inches, the emulation signals must be buffered. If the distance is less than six
inches, no buffering is necessary. The following illustrations depict these two situations.
❏
The EMU0 and EMU1 signals must have pull-up resistors connected to VCC to provide
a signal rise time of less than 10 us. A 4.7-kW resistor is suggested for most
applications.
Buffered transmission signals. In this situation, the distance between the emulation
header and the processor is greater than six inches. Emulation signals TMS, TDI, TDO,
and TCK_RET are buffered through the same package.
target device should be no more than six inches.
No signal buffering. In this situation, the distance between the header and the JTAG
Vcc I/O
GND
10
12
6
8
5
4
GND
GND
GND
GND
GND
PD
Figure 3-5, Unbuffered Signal Connections
Emulation Header
EMU0
EMU1
TRST
TMS
TDO
TCK
TDI
13
14
11
2
1
3
7
9
XDS560R JTAG Emulator Installation Guide
6 Inches or Less
Vcc I/O
TCK_RET
EMU1
TRST
TMS
TDI
TDO
TCK
EMU0
Target Device