Rev.6.00 Oct.28.2004 page 642
of 1016
REJ09B0138-0600H
19.19
Flash Memory Protection
There are three kinds of flash memory program/erase protection: hardware protection, software protection, and error
protection.
19.19.1
Hardware Protection
Hardware protection refers to a state in which programming/erasing of flash memory is forcibly disabled or aborted.
Settings in flash memory control registers 1 and 2 (FLMCR1, FLMCR2) and erase block registers 1 and 2 (EBR1, EBR2)
are reset. (See table 19-37.)
Table 19-37 Hardware Protection
Functions
Item
Description
Program
Erase
Reset/standby
protection
•
In a reset (including a WDT overflow reset)
and in standby mode, FLMCR1, FLMCR2,
EBR1, and EBR2 are initialized, and the
program/erase-protected state is entered.
•
In a reset via the
RES
pin, the reset state
is not entered unless the
RES
pin is held
low until oscillation stabilizes after
powering on. In the case of a reset during
operation, hold the
RES
pin low for the
RES
pulse width specified in the AC
Characteristics section.
Yes
Yes
Содержание ZTAT H8S/2357F
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