Datasheet

Section 25 Flash Memory
Rev. 2.00 Aug. 20, 2008 Page 981 of 1198
REJ09B0403-0200
Table 25.10 Hardware Protection
Function to be Protected
Item Description Download Program/Erase
FWE pin protection
• When a low level signal is input to the
FWE pin, the FWE bit in FCCS is
cleared and the program/erase-
protected state is entered.

Reset/standby
protection
• The program/erase interface registers
are initialized in the reset state
(including a reset by the WDT) and
standby mode and the program/erase-
protected state is entered.
• The reset state will not be entered by
a reset using the RES pin unless the
RES pin is held low until oscillation
has stabilized after power is initially
supplied. 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 a reset is input during
programming or erasure, data values
in the flash memory are not
guaranteed. In this case, execute
erasure and then execute program
again.