MSP430G2553: connecting to 4-pin Spy-By-wire to program a MSP430G2553 MCU

Alfonso Benavides

Part Number: MSP430G2553
Other Parts Discussed in Thread: DRV8702D-Q1EVM, MSP-FET

Tool/software:

I am working with a DRV8702D-Q1EVM H-Bridge controller board that has a MSP430G2553 MCU that can be programmed using a TI-CCS software. I have been unable to identify a product that can connect to the board to program the MCU. When the board is connected via mini USB, the CCS software doesn't detect neither the board nor MCU. Previous E2E thread suggested using a MSP-EXPG2ET board to program the MSP430 H-bridge controller but I don't know if its possible to connect the MSP-EXPG2ET to the 4-pin Spy-By-wire (SBW) female connector on the DRV8702D-Q1EVM. Most of options such as the MSP-FET, uses a female 2x7 connector for SBW communications. Basically I need the DRV8702D-Q1EVM to generate custom waveforms by programming its MSP430G2553 MCU, so the questions are:

i) can I do it using a MSP-EXPG2ET board as intermediate?.

ii) if yes, is there any wire/connector available to connect the MSP-EXPG2ET board to the female 4-pin SBW connector on the DRV8702D-Q1EVM? If not, can you provide any other commercial options?

iii) In case we need to custom build out own cable, can you provide me with a wiring schematic and connector types?

Thanks

3 months ago

0 JOJO ARTHUR 3 months ago

TI__Intellectual 940 points

Hello Alfonso,
Thank you for contacting us via this forum.

Furthermore, according to the DRV8702D-Q1EVM User Guide, the micro-USB's intended purpose is to download a program to the MSP430 MCU memory and run it. Moreover, to program the MSP430 on the EVM, the Spy-Bi-Wire interface is to be used which means that an intermediate board is needed for this. Kindly find reference to this information below from the linked user guide: https://www.ti.com/lit/ug/slvub10/slvub10.pdf?ts=1749137143644&ref_url=https%253A%252F%252Fwww.ti.com%252Ftool%252FDRV8702D-Q1EVM

With regards to your questions, yes the MSP-EXPG2ET board should be able to act as an intermediate board to the DRV8702D-Q1EVM. However, to ensure the connection works appropriately, you will need to remove the four jumper shorts and ensure the connection to the 4-pins of the EVM J3 interface are in the correct order. Further guides can be found below for references.

MSP430 Spy-Bi-Wire With SimpleLink MCUs: https://www.ti.com/lit/an/slaa754/slaa754.pdf

MSP Debuggers User's Guide --> https://www.ti.com/lit/ug/slau647/slau647.pdf

Regards, Jojo

0 Alfonso Benavides 3 months ago in reply to JOJO ARTHUR

Prodigy 60 points

I've got a MSP-EXP340G2ET and I was able to control the DRV8702D-Q1EVM H-bridge using MSP I/Os connected to J4's IN1, IN2 and nSLEEP pins. In order to achieve this, I needed to disable the DRV MCU by moving J2 jumper into PUSH position and the RST pin to GND.

I made a comm cable to flash the DRV's MCU via J3 4-pin SWB connector, Still fabled for not finding a commercial 4-pin SWB connector. Thanks for your support.

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MSP430G2553: connecting to 4-pin Spy-By-wire to program a MSP430G2553 MCU