Hardware Protection; Software Protection - Renesas H8S/2319 series Hardware Manual

Table 17-54 Hardware Protection
Item
Reset/standby
protection

17.25.2 Software Protection

Software protection is set up in any of three ways: by disabling the downloading of on-chip
programs for programming and erasing, by means of a key code, and by the RAM-emulation
register.
Rev. 5.00, 12/03, page 714 of 1088
Description
•
A power-on reset (including a power-
on reset by the WDT) and entry to
standby mode reinitialize the
program/erase interface register and
the device enters a program/erase-
protected state.
Resetting by means of the RES pin
•
after power is initially supplied will not
make the device enter the reset state
unless the RES pin is held low until
oscillation has stabilized. In the case
of a reset during operation, hold the
RES pin low for the RES pulse width
that is specified in the section on AC
characteristics section. If the device is
reset during programming or erasure,
data values in the flash memory are
not guaranteed. In this case, after
keeping the RES pin low for at least
100 µs, execute erasure and then
execute programming again.
Function to be Protected
Download Program/Erase
Yes Yes