Renesas H8SX/1520 Series Hardware Manual page 697

12. A programming/erasing program for the flash memory used in a conventional F-ZTAT H8,
H8S microcomputer which does not support download of the on-chip program by setting the
SCO bit in FCCS to 1 cannot run in this LSI. Be sure to download the on-chip program to
execute programming/erasing of the flash memory in this F-ZTAT H8SX microcomputer.
13. Unlike a conventional F-ZTAT H8 or H8S microcomputers, measures against a program crash
are not taken by WDT during programming/erasing. When needed, measures should be taken
by user. A periodic interrupt generated by the WDT can be used as the measures, as an
example. The interrupt generation cycle should take into consideration time to download a
programming/erasing program and time to program/erase the flash memory.
14. When downloading the programming/erasing program, do not clear the SCO bit in FCCS to 0
after immediately setting it to 1. Otherwise, download cannot be performed normally.
Immediately after executing the instruction to set the SCO bit to 1, dummy read of the FCCS
must be executed twice.
15. The contents of some general registers are not saved in a programming/ programming
end/erasing program. When needed, save general registers in the procedure program.
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Section 17 Flash Memory (0.18-(m F-ZTAT Version)
Rev. 3.00 Mar. 14, 2006 Page 659 of 804
REJ09B0104-0300