15.6.2 Flash Memory Organization

The device Flash memory is divided into two logical Flash partitions:

  1. Main Program Flash Memory (PFM)
  2. Boot/Configuration Flash Memory (BFM)
    1. Boot Flash
    2. Device/Boot Configuration – Device and boot configuration data
    3. OTP – User system calibration data

The following table provides details about each Flash section having different protection status.

Table 15-1. Protection Status
Flash PartitionMemory RegionWrite ProtectionErase ProtectionChip Erase through DSU
BFMBoot Flash Yes.

Page-wise Configurable

Yes.

Page-wise Configurable

Erased
Device/Boot ConfigurationYes.

Configurable

Yes.

Configurable

Erased
One Time Programmable (OTP)Yes.

Configurable

Always Erase protected.

Can not be erased

Not Erased
PFMProgram FlashYes.

Configurable

Yes.

Configurable

Erased