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MSP430FR2311: Program failed both SBW and BSL mode

Part Number: MSP430FR2311
Other Parts Discussed in Thread: MSP-GANG

I mass-produced a batch of products, using MSP430FR2311IPW16R. Use MSP-GANG to burn, burn 8 pieces each time, Unfortunately, many program failed.

So, I made the simplest circuit board, which only includes a chip and a reset resistor and capacitor, and it cannot be programmed. After replacing the chip, it can be burned.

I used an oscilloscope and a logic analyzer to record the waveform of the FET430 during programming. (See the appendix for the wave file record.)

simplest circuit board(only 3 components: chip, 47k resistor, 1nf capacitor)

wafeform for OK chip.

wafeform for NG chip(FET430 send data, but no answer from P1.7 UCA0TXD)

waveform recorded by PulseView

waveform by PulseView.rar

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