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Internal VCCP power

Nomo
Guru 16800 points
Other Parts Discussed in Thread: TMS570LS2125

Hi,

My customer has made a TMS570LS2125 evaluation board and evaluated it.
When VCCP is not connected correctly and power isn't supplied,
JTAG debugger can't be connected.
In my recognition, VCCP is Flash power, so VCCP and JTAG are unconcerned.
Could you teach me why VCCP is related to JTAG?

Best Regards.

Nomoto

  • 0
    TI__Mastermind 49120 points

    Hello,

    The VCCP is the supply for the flash pump. The flash pump has an internal power-on reset generation circuit which is based on the VCCP supply being within the specified range. In case the VCCP supply is out of the specified range, then a power-on reset is generated for the entire device. This prevents any debugger connection, or any other operation of the MCU.

    Regards, Sunil