h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 831

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

21A.10 Protection
There are three kinds of flash memory program/erase protection: hardware protection, software
protection, and error protection.
21A.10.1 Hardware Protection
Hardware protection refers to a state in which programming/erasing of flash memory is forcibly
disabled or aborted. Hardware protection is reset by settings in flash memory control register 1
(FLMCR1), flash memory control register 2 (FLMCR2), erase block register 1 (EBR1), and erase
block register 2 (EBR2). The FLMCR1, FLMCR2, EBR1, and EBR2 settings are retained in the
error-protected state (See table 21A-11).
Table 21A-11 Hardware Protection
Item
FWE pin protection
Reset/standby
protection
Description
When a low level is input to the FWE pin,
FLMCR1, FLMCR2, (except bit FLER)
EBR1, and EBR2 are initialized, and the
program/erase-protected state is entered.
In a reset (including a WDT 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
not entered unless the
until oscillation stabilizes after powering on.
In the case of a reset during operation, hold
the
specified in the AC Characteristics section.
R E S
pin low for the
R E S
pin, the reset state is
R E S
R E S
pin is held low
pulse width
Rev. 6.00 Feb 22, 2005 page 771 of 1484
Section 21A ROM (H8S/2636 Group)
Yes
Yes
Program
Functions
REJ09B0103-0600
Erase
Yes
Yes