12.1.5.9 General-purpose NVM (GPNVM) Bits

All PIC32CZ CA70/MC70 devices feature general-purpose NVM (GPNVM) bits that can be cleared or set, through the “Clear GPNVM Bit” and “Set GPNVM Bit” commands of the EEFC User Interface.

Table 12-4. General-purpose Non volatile Memory Bits
GPNVM BitFunction
0Security bit
1Boot mode selection

0: ROM (default)

1: Flash

Important: A reset is required after state change.
5:2Free
6Reserved
8:7TCM configuration

00: 0 Kbytes DTCM + 0 Kbytes ITCM (default)

01: 32 Kbytes DTCM + 32 Kbytes ITCM

10: 64 Kbytes DTCM + 64 Kbytes ITCM

11: 128 Kbytes DTCM + 128 Kbytes ITCM