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MSP430FR6989: MSP430 JTAG interface for ESD protection

Part Number: MSP430FR6989

Hi community member,

I received questions from my customers about MSP430 JTAG interface for ESD protection.
Please let me confirm the following a question.

Device : MSP430FR6989

[Question]

1-1.Is it possible to insert a resistor between the MSP430 and JTAG debugger for ESD protection?
1-2.If answer is possible, is there a recommended range of resistance values?

2.Is there information other than the data sheet for MSP430 internal circuit of RST, TDO, TDI, TMS, TCK, TEST pin?

Best regards.
Cruijff

  • Hello Cruijff,

    You can find more detail information on ESD protection from this application report:
    www.ti.com/.../slaa530.pdf

    Thanks,
    Yiding
  • Cruijff said:

    1-1.Is it possible to insert a resistor between the MSP430 and JTAG debugger for ESD protection?
    1-2.If answer is possible, is there a recommended range of resistance values?

    This (tuned) resistors are already placed inside FET (check FET related schematics). Adding more resistance to JTAG lines can cause failing JTAG communication.

  • HI Yiding,

    Thank you for your reply!

    I'll check the application report.

    Do you have any of the following information?

    • 2.Is there information other than the data sheet for MSP430 internal circuit of RST, TDO, TDI, TMS, TCK, TEST pin?

    Please let me know if you have any information.

    Thanks,

    Cruijff

  • HI zrno,

    Thank you for your reply!

    Do you have any of the following information?

    • 2.Is there information other than the data sheet for MSP430 internal circuit of RST, TDO, TDI, TMS, TCK, TEST pin?

    Please let me know if you have any information.

    Thanks,

    Cruijff

  • Hello Cruijff,

    The application report should help you with most of the questions regarding the MSP430 ESD protection. 

    Unfortunately we do not provide the internal circuit of the JTAG pins.

    What you see on the data sheet will be what we can provide.

    Thanks,

    Yiding

  • HI Yiding,

    Thank you for your reply!

    I understood that there is no information on the internal circuit of the JTAG pin except data sheet.

    Thanks,

    Cruijff

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