h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 702

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 20 ROM
20.2.4
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.
SCI
Flash memory
RAM
Overlap RAM
Emulation block
(emulation is performed
on data written in RAM)
Application program
Execution state
Figure 20.3 Reading Overlap RAM Data in User Mode or 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.
Rev. 5.00 Sep 22, 2005 page 676 of 1136
REJ09B0257-0500