Code Flash Memory Erasure And Rewrite - NEC V850ES/F 3-L Series User Manual

Flash Memory
a)
The boot block cluster protection flag is not erased.

7.1.4 Code flash memory erasure and rewrite

Erasure
Rewrite
According to its block structure the flash memory can be erased in two different
modes.
• All-blocks batch erasure (chip erase)
All blocks are erased all together.
• Block erasure
Each 2 KB flash memory block can be erased separately.
In self-programming mode any number of contiguous flash memory blocks
can be erased all together.
In self- and serial programming mode it is possible to rewrite the flash memory
in smaller units than one block. Once a complete block has been erased it can
be rewritten in units of 8 bytes. Each unit can be rewritten only once after
erasure of the complete block.
User's Manual U18743EE1V2UM00
Chapter 7
265