TMS570LS3137: May I use TMDS570LS31HDK and LAUNCHXL2-TMS57012 as an emulator for my board with TMS570LS3137?

Hello Datïan,

You can, but you need to make some modifications to the launchpad.

1. Add a 20-pin JTAG header to J1 footprint,

2. Turn off the power to TMS570LS12x MCU on launchpad. 

Hello Ditian,

It is impossible to remove the power supplies from TMS570LSx, but you can pull-down the nPORRST by removing the resistor R9:

BTW, I am not responsible for the board damage caused by those modifications. 

Hi Datian,

For HDK,

1. Don't provide power supply (12V) to board. Use USB power only. The FT chip and CPLD are powered with USB 5V.

2. Bend pin 8 of 20-pin ARM JTAG header, since this pin is shorted to GND when external emulator is plugged to disable the xds100v2. Bending pin 8 will keep the xds100v2 enabled.

BTW, I did not try before, but you can try it.

Hello Datian,

Please read our datasheet. The JTAG on TMS570 requires the following signals:

1. nTRST.   --- MUST. This signal has to be pulled down.

2. TMS,  --- MUST

3. TCK    --- MUST

4. TDI     --- MUST

5. TDO    --- MUST

6. RTCK is optional. This is used for adaptive feature. It is not a MUST.