
A DIVISION OF TRIMBLE
Hardware Reference Guide 119
JTAG Interface
The JTAG Interface is compatible with the SAM-ICE or other J-Link-based devices. Its
pin-out is as follows:
There is no orientation mark on either the jack or plug, so you must ensure that it is
connected this way:
Power Source Precedence
There are multiple sources of power into the xPRESS Motherboard, all of which might be
present simultaneously:
5V from “Wall-wart” AC adapter connection
5V from USB “USBOTG” Interface
Li-Ion battery
Signal
Pin Pin Signal
V_3R3 1 2 TMS
GND 3 4 TCK
GND 5 6 TDO
NC 7 8 TDI
GND 9 10 RESET
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