Rohm LAPIS SEMICONDUCTOR ML620Q503, User Manual

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ML620Q503/Q504 User's Manual
Chapter 27 Flash Memory Control
FEUL620Q504 27- 14
[Note]
Write the boot program in the addresses from FC00H to FDDFH of the ISP boot area (addresses FC00H to
FDFFH) in advance by using the on-chip ICE function. Please be sure to write “0FFH” in FDE0-FDFFH.
Do not set TEST0 pin to “0” during the program execution of hardware remapping.
27.3.6 Notes of the program after remapping
Load address 0000H of ROM by startup of program* executed after remapping at the head at which
reset-vector points, and set it to stackpointer. Figure 27-5 shows an example of program.
$$start_up:
L ER0, 0000H
MOV SP, ER0
BAL $begin
Figure 27-5 Example program of setting stackpointer
*:ISP program, loader program, user program will be targeted.
It is recommended to apply this setting even if the remap is not used.
[Note]
When the stackpointer is not set with software at the time of the software-remap from ISP program to user
program, it is likely not to operate normally.