The F28069, F28068, F28067, and F28066 devices contain 128K × 16 of embedded flash memory, segregated into eight 16K × 16 sectors. The F28065, F28064, F28063, and F28062 devices contain 64K × 16 of embedded flash memory, segregated into eight 8K × 16 sectors. All devices also contain a single 1K × 16 of OTP memory at address range 0x3D 7800 to 0x3D 7BF9. The user can individually erase, program, and validate a flash sector while leaving other sectors untouched. However, it is not possible to use one sector of the flash or the OTP to execute flash algorithms that erase or program other sectors. Special memory pipelining is provided to enable the flash module to achieve higher performance. The flash/OTP is mapped to both program and data space; therefore, it can be used to execute code or store data information. Addresses 0x3F 7FF0 to 0x3F 7FF5 are reserved for data variables and should not contain program code.
The Flash and OTP wait states can be configured by the application. This allows applications running at slower frequencies to configure the flash to use fewer wait states.
Flash effective performance can be improved by enabling the flash pipeline mode in the Flash options register. With this mode enabled, effective performance of linear code execution will be much faster than the raw performance indicated by the wait-state configuration alone. The exact performance gain when using the Flash pipeline mode is application-dependent.
For more information on the Flash options, Flash wait state, and OTP wait-state registers, see the Systems Control and Interrupts chapter of the TMS320x2806x Technical Reference Manual.