Multitech MultiConnect xDot MTXDOT-NA1 Series Developer's Manual page 72

MOUNTING XDOTS AND PROGRAMMING EXTERNAL TARGETS
Blue arrows point to slots for the xDot first and last serial number positions on the tray and the serial number flow
through the tray.
In-System Programming of xDot
You can use the xDot developer board to in-system program an xDot on your custom board. To do this, your board
must implement a 9-pin header for the JTAG SWD and Mbed debug serial signals. See the example schematic in
this topic.
When the xDot developer board detects a target voltage on Pin 1 of JP1, it redirects the Mbed programming
interface to the external xDot. You can use the Mbed programming environment as normal to program and debug
the external xDot.
Warning: Electrostatic discharge (ESD) can damage the MTMDK-XDOT. Potential failure via ESD through the
JTAG headers include the MTMDK-XDOT processor, level converters, and potentially the target device.
To use the external target programming header:
1. Use a 10-position ribbon cable to connect xDot developer board header JP1 to the SWD programming
header on your custom board.
2. Apply power to your target board.
3. Use the Mbed programming environment as normal.
Schematic Example
Schematic example shows programming header connections for xDot on custom board.
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xDot Developer Guide