HD64F2357VF13 Datasheet, PDF (672/1049 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

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
Item
Reset/standby
protection
Functions
Description
Program Erase
• In a reset (including a WDT overflow reset) ^Yes
Yes
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.
Rev.6.00 Oct.28.2004 page 642 of 1016
REJ09B0138-0600H