Distributor of Spectrum Digital Inc: Excellent Integrated System Limited
Datasheet of 702570 - TARGET ADAPTER CBL 20P CTI JTAG
Contact us: [email protected] Website: www.integrated-circuit.com
Spectrum Digital, Inc
3-6
XDS560R JTAG Emulator Installation Guide
To support selection of the proper I/O voltage, the target header has a Target Voltage
Detect (TVD) signal. This signal (pin 5) should be tied to the I/O voltage of the target
processor.
If the target system needs to supports multiple I/O voltages on the scan string, the
lowest voltage devices should be placed first.
A translation buffer should be used to connect the rest of the scan string. TCK, TMS,
and TRST must have similar considerations.
Two copies of each signal may be required with each driving a different voltage level.
27
Ω
Figure 3-3, Emulator Pod Interface
Out
Out
Out
Out
Out
Out
In1
In2
In3
In4
Op-Amp
Level
Translator
Comparator
27
Ω
27
Ω
27
Ω
27
Ω
27
Ω
Emulation
Header
2 TRST
4 TDIS
6 GND
8 GND
10 GND
12 GND
14 EMU1
TMS 1
TDI 3
TVD 5
TDO 7
TCKR 9
TCK 11
EMU0 13
K
Ω
100
K
Ω
100
K
Ω
100
K
Ω
100
100
Ω
100 pF
TVD Voltage /2
TVD Voltage
K
Ω
100
VCC
In
In
.01 uF
.01 uF
10 K
Ω
100 K
Ω
10 K
Ω
100 K
Ω
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