15.1.2.6 NVMREG Access to DIA, DCI, User ID, Device ID, Revision ID, and Configuration Words

NVMREGS can be used to access the following memory regions:
  • Device Information Area (DIA)
  • Device Configuration Information (DCI)
  • User ID region
  • Device ID and Revision ID
  • Configuration Words

The value of NVMREGS is set to ‘1’ to access these regions. The memory regions listed above will be pointed to by PC[15] = 1, but not all addresses reference valid data. Different access may exist for reads and writes. Refer to the table below. When read access is initiated on an address outside the parameters listed in the following table, the NVMDATH: NVMDATL register pair is cleared, reading back ‘0’s.

Table 15-2. NVMREG Access to DIA, DCI, User ID, Device ID, Revision ID and Configuration Words (NVMREGS = 1)
Address Function Read Access Write Access
0x8000 - 0x8003 User IDs Yes Yes
0x8005 - 0x8006 Device ID/Revision ID Yes No
0x8007 - 0x800B Configuration Words 1-5 Yes Yes
0x8100 - 0x82FF DIA and DCI Yes No
0xF000 - 0xF0FF EEPROM Yes Yes