Datasheet

EMU0−EMU1 Signal Considerations
3-17
Target Design Considerations for Using the XDS560 Emulation Pod
The CBT device could be used to limit the number of devices that the driving
EMU0−EMU1 signal is loaded with; thereby limiting the amount of capacitance
loading that is seen by the driving EMU0−EMU1 signal.
Using this solution would require the user to have a manual jumper selection
to enable which bank of devices that emulator would able to establish HS-
RTDX communication with.
Figure 3−8 shows a possible solution to minimize the loading effects of having
to many target devices connected on the EMU0/EMU1 signals.
Please refer to Section 3.7 for recommended connections of the JTAG signals.
Figure 3−8. Bank Selection of EMU Signals
EMU0
EMU1
TRST
TMS
TDI
TDO
TCK
TCK_RET
TVD
GND
GND
GND
GND
GND
13
14
1
2
9
11
7
3
Emulation header
VCC I/O
EMU0
EMU1
TRST
TMS
TDI
TDO
TCK
Target device
5
4
6
8
10
12
EMU0
TCK
TDO
TDI
TRST
TMS
EMU1
Target device
(4 or more)
(4 or more)
VCC
VCC
+5V
VCC
1B
2B
3B
4B
GND
1OE
1A
2OE
2A
3OE
3A
4OE
4A
SN74CBT3125
14
3
6
8
11
7
1
2
4
5
10
9
13
12
1
3
2
HDR 3X1
Bank En0
Bank En1
VCC