SH7050 Datasheet, PDF (610/841 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH RISC engine Family/

Section 19 ROM (256 kB Version)
19.2.4 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
SCI
Flash memory
RAM
Overlap RAM
(emulation is performed
on data written in RAM)
Application program
Execution state
Emulation block
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 Jan 06, 2006 page 590 of 818
REJ09B0273-0500