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Notes for Registers that need to be set before data can be written in Semper QSPI.

Notes for Registers that need to be set before data can be written in Semper QSPI.

KatsumasaH_16
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Original KBA: Semper QSPIでデータ書き込み前に設定が必要なレジスタ

Picking up registers that lead to data corruption if they are changed after data has been written, to prevent malfunctions due to usage.

  1. Some registers may cause data loss or incorrect data reading if they are changed after data writing.
  2. When changing these registers, erase the data before changing the register and then write the data.
  3. Target registers
    • CFR1N[6], CFR1V[6] :  SP4KBS / Split 4 KB Sectors selection between top and bottom address space
    • CFR1N[2], CFR1V[2] : TB4KBS / Top or Bottom Address Range selection for 4KB Sector Block
    • CFR3N[3], CFR3V[3] : UNHYSA / Uniform or Hybrid Sector Architecture Selection
    • CFR4N[4], CFR4V[4] :  ECC12S / Error Correction Code (ECC) 1bit or 1 bit/2 bit error correction selection
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