Product manual

PCI Express to PMC adapter Copyright © 2011, Technobox, Inc
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JTAG header (JP3)
A 12-pin header allows user access to the JTAG signals on the mezzanine card card and the motherboard.
Normally these signals are passed through with 6 jumpers, with the ground jumper being a spare.
Pin Function
Mezzanine
Header Pin
Number
Header Pin
Number
Pin Function
PCI Express
TDI 1 2 TDO
TDO 3 4 TDI
TCLK 5 6 TCLK
TMS 7 8 TMS
TRST 9 10 TRST
GND 11 12 GND
Table 7 JTAG functions JP3
If access to the JTAG chain on the PMC is needed remove the jumpers to allow use of a custom cable.
Most 0.1 inch center to center female headers will work, but check the datasheet to determine compatibility
with the mechanical dimensions shown.
Figure 11 JTAG Factory jumper setting