Protection; Hardware Protection - Renesas H8S Series Hardware Manual

Item
Erasure
Determination of
erasure result
Erasing error
processing
FKEY clearing
Switching MATs by
FMATS
Note: Switching FMATS by a program in the on-chip RAM enables this area to be used.
*
21.5

Protection

There are two kinds of flash memory programming/erasing protection: hardware and software
protection.
21.5.1

Hardware Protection

Programming and erasing of flash memory is forcibly disabled or suspended by hardware
protection. In this state, the downloading of an on-chip program and initialization are possible.
However, even though a programming/erasing program is initiated, the user MAT cannot be
programmed/erased, and a programming/erasing error is reported with the FPFR parameter.
Storable/Executable Area
User Boot
|On-chip RAM MAT
Ο ×
Ο ×
Ο ×*
Ο ×
Ο ×
Section 21 Flash Memory (0.18-µm F-ZTAT Version)
Selected MAT
User MAT
Ο
Ο
Ο
Ο
Ο
Rev. 3.00 Jul. 14, 2005 Page 791 of 986
Embedded
Program
User Boot Storage
MAT MAT
REJ09B0098-0300