Hello, Please provide the memory contents of the MSP430G2553 device before and after attempting to program, as well as the binary code image you are trying to download. Segment A (0x10C0 to 0x10FF) is the TLV and contains calibration data for the DCO and ADC10. After reset segment A is protected against programming and erasing, care should be taken to not reset the LOCKA bit of FCTL3 and erase this segment if the device-specific calibration data is required. What programming software are you using? It is concerning that you appear to erase and re-program the TLV structure. Regards, Ryan
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