Datasheet

Section 19 ROM
Rev.6.00 Sep. 27, 2007 Page 797 of 1268
REJ09B0220-0600
Writing Overlap RAM Data in User Program Mode: When overlap RAM data is confirmed,
the RAMS bit is cleared, RAM overlap is released, and writes should actually be performed to the
flash memory.
When the programming control program is transferred to RAM, ensure that the transfer destination
and the overlap RAM do not overlap, as this will cause data in the overlap RAM to be rewritten.
Application program
Flash memory
RAM
SCI
Overlap RAM
(programming data)
Programming data
Programming control
program
Execution state
Figure 19.34 Writing Overlap RAM Data in User Program Mode
19.13.6 Differences between Boot Mode and User Program Mode
Table 19.25 Differnces between Boot Mode and User Program Mode
Boot Mode User Program Mode
Entire memory erase Yes Yes
Block erase No Yes
Programming control program
*
Program/program-verify Erase/erase-verify/program/
program-verify/emulation
Note: * To be provided by the user, in accordance with the recommended algorithm.