31.1.1 Features

The following are key feature of the Flash Controller, Write Module:

• Support Flash partitions
  • Program Flash Memory (PFM)
  • Boot Flash Memory (BFM)
  • Configuration Flash Memory (CFM)
• Mission Mode Write/Erase Features:
  • PFM Erase
  • Page Erase
  • Single Write (32-bit) + simple parity
  • Quad Write (128-bit) + SECDED ECC
  • Row Write + SECDED ECC
    • Built-in DMA of data from DRAM
  • All write operations support Pre-Program to increase endurance and retention
• BFM Address Swap
  • Supports Dual Boot
  • Support Live Update
• PFM Address Swap
• Debug Erase features are implemented by ROM Code:
  • Identical to Mission Mode – PLUS:
  • Chip Erase: PFM [+ SRF] & unprotected NVR pages - available to the Boot only
  • CFM pages must be unprotected to erase
  • NVR Test pages cannot be erased
  • BRCTRL SFR for feature lockout
• Debug Programming Features
  • Identical to Mission Mode
• Program Flash Memory (PFM) Write Protect, with 4 protection regions
  • Region defined by Base and Size
  • Lockable
• Boot Flash Memory (BFM) Write Protect
  • Individual (4KB) Page write protect regions
  • Compatible with Dual Boot
  • Lockable
• Flash based User OTP pages
  • Not erased by Chip Erase or Page Erase
  • 4 Lockable Write Protect regions per Page
  • Supports storage of user calibration values
• Security features for a TrustZone (TZ) CPU
  • Intended to be owned by trusted code
  • Not Split-Secure
  • Write of Tamper Log on configured tamper detect