SH7014 Datasheet, PDF (528/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

18. 128 kB Flash Memory (F-ZTAT)
18.2.4 Flash Memory Emulation in RAM
Emulation should be performed in user mode or user program mode. When the emulation block
set in RAMER is accessed while the emulation function is being executed, data written in the
overlap RAM is read.
• User Mode
• User Program Mode
Flash memory
SCI
RAM
Application program
Execution state
Overlap RAM
(emulation is performed
on data written in RAM)
Emulation block
Figure 18.5 Emulation
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.
Rev.5.00 Sep. 27, 2007 Page 494 of 716
REJ09B0398-0500