HD64F3048VTF8 Datasheet, PDF (610/903 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip

Section 18 ROM (H8/3048F-ONE: Single Power Supply, H8/3048B Mask ROM Version)
Flash memory
Programming data
SCI
RAM
Application program
Overlap RAM
(programming data)
Programming control
program execution state
Figure 18.4 Writing Overlap RAM Data in User Program Mode
18.2.5 Differences between Boot Mode and User Program Mode
Item
Boot Mode
User Program Mode
Total erase
Yes
No
Block erase
Programming control program^*
No
Boot program is initiated,
and programming control
program is transferred from
host to on-chip RAM, and
executed there.
Yes
Program that controls
programming program in flash
memory is executed. Program
should be written beforehand in
PROM mode and boot mode.
Note: * To be provided by the user, in accordance with the recommended algorithm.
Rev. 3.00 Sep 27, 2006 page 582 of 872
REJ09B0325-0300