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EZTag User Guide
Flying Lead Connectors
The flying lead connector is two flying lead header connectors with
eight standard individual female connectors on one end that fit onto
0.025" square male pins. Each lead is labeled to identify the proper
pin connection.
Cable Connections
Connections between the cable assembly and the target system use 6
leads. For connection to JTAG boundary-scan systems you need to
ensure that the VCC, GND, TDI, TCK, TMS and TDO pins are
connected.
Once installed properly, the connectors provide power to the cable,
allow download and readback of configuration data, and provide for
logic probe of device pins.
Table 2-3 describes the pin connections to the target circuit board.
Table 2-3 XChecker Cable Connections and Definitions
Name
VCC
GND
TDO
TDI
TCK
2-10
Function
Power – Supplies V
CC
100 mA, typically) to the
cable.
Ground – Supplies ground
reference to the cable.
Read Data – Read back
data from the target sys-
tem is read at this pin.
Test Data In – this signal is
used to transmit serial test
instructions and data.
Test Clock – this clock
drives the test logic for all
devices on boundary-scan
chain.
Connections
(5 V,
To target system V
To target system
ground
Connect to system
TDO pin.
Connect to system TDI
pin.
Connect to system
TCK pin.
Xilinx Development System
CC
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