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TPLD1201-RWB-EVM: Regarding the memory of the EVM

Kyohei
Expert 1460 points
Part Number: TPLD1201-RWB-EVM
Other Parts Discussed in Thread: TPLD1201

Tool/software:

Hi team,

My understanding is that when writing data to the TPLD1201 using the EVM, the data will be erased when the power is turned off unless it is permanently programmed.

However, the previous program data remains even after restarting the device.

Where is this data stored? According to Figure 4-1 of the user’s guide, EEPROM is not available, so could you tell me where the memory is located?

  • 0
    TI__Genius 12881 points

    Hi Kyohei,

    Data is not stored on the EVM. If you are seeing data being retained through a power cycle the only possibility is the device never truly lost power. This can happen when the switch near the programmer connecter is the switched off. Some of the other pins receive enough voltage to back power the device through the input clamp diodes.

    Disconnecting the programmer cable to the EVM, or unplugging the programmer from the computer are the most secure way to ensure that the device is being completely wiped.

    Regards,

    Owen

  • 0 in reply to Owen Westfall
    Expert 1460 points

    Hi Owen,

    Thank you for your reply.

    I understood.

    I have an additional question.

    Is my understanding correct that writing to the TPLD1201 is done via serial communication using two GPIO pins designated as SCL and SDA?

    Best regards,

    Kyohei

  • +1 in reply to Kyohei
    TI__Genius 12881 points

    Hi Kyohei,

    It is using SPI in burst mode to do the uploading and this goes through pins IO5, IO1, IO2, and IO4 .

    Regards,

    Owen