HD6432621 Hitachi, HD6432621 Datasheet - Page 664
HD6432621
Manufacturer Part Number
HD6432621
Description
(HD64F262x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432621.pdf
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19.2.4
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.
620
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.
Figure 19-3 Reading Overlap RAM Data in User Mode or User Program Mode
Flash Memory Emulation in RAM
Application program
Emulation block
Execution state
Flash memory
(emulation is performed
on data written in RAM)
Overlap RAM
RAM
SCI
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