SBC Axel SBC/Interfaces and Connectors/JTAG

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History
Version Issue Date Notes
1.0.0 Sep 2020 New layout documentation



On board JTAG connector[edit | edit source]

JTAG signals are routed to a dedicated connector on the AXEL Lite PCB.

The connector is placed on the top side of the PCB, at the upper-right corner (please see the picture below).

Axellite-jtag-conn.png

J7 - Connector's pinout[edit | edit source]

J7 footprint mates with Samtec FSI-110-03-G-S connector. The following table reports the connector's pinout:

JTAG connector


Pin# Pin name Function Notes
1 DGND - -
2 JTAG_TCK - -
3 JTAG_TMS - 10K pull-up to 3V3 (BOARD_PGOOD driven signal)
4 JTAG_TDO - 10K pull-up to 3V3 (BOARD_PGOOD driven signal)
5 JTAG_TDI - 10K pull-up to 3V3 (BOARD_PGOOD driven signal)
6 JTAG_nTRST - 10K pull-up to 3V3 (BOARD_PGOOD driven signal)
7 CPU_PORn - -
8 N.C. - -
9 N.C. - -
10 JTAG_VREF - 3V3 (BOARD_PGOOD driven signal)