Syntacore SCR1 SDK Arty

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This article describes specifics for the Syntacore SCR1 Arty SDK.

J-Link support

Hardware requirements

Please note that a current J-Link model is needed for RISC-V support: Overview

Software requirements

J-Link supports the Syntacore SCR1 since the following J-Link software versions:

Limitations

Maximum JTAG speed

When debugging on the Syntacore SCR1 Arty SDK, the max. JTAG speed that can be used is 1 MHz. Speeds above 1 MHz will result in unstable operation of the debug interface on the device. The device sometimes simply returns garbage status info and data even though the signal quality of both sides is absolutely perfect. This is not a limitation of J-Link but of the Syntacore SCR1

Preparing for J-Link

The Syntacore SCR1 Arty SDK does not come with a standard debug connector but populates the debug JTAG signals on a custom connector. Therefore, it needs to be manually wired in case J-Link shall be connected to it.

In the following, it is described how the pins of connector JD on the ARTY board needs to be wired to J-Link. All pins of the J-Link side refer to the standard 0.1" 20-pin connector of J-Link.

Wiring connection
Pin JD (ARTY) Pin J-Link Description
3 3 nTRST
4 9 TCK
7 13 TDO
8 5 TDI
9 15 nRESET
10 7 TMS
11 4 GND
12 1 VCC/VTref

Note: The pins on the JD connector are numbered as follows:

6 5 4 3 2 1
12 11 10 9 8 7

Wiki-sifive arty board.png