HD64F3644PV Datasheet, PDF (170/551 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 6 ROM
6.7.8 Protect Modes
There are two modes for flash memory program/erase protection: hardware protection and
software protection. These two protection modes are described below.
Software Protection: With software protection, setting the P or E bit in the flash memory control
register (FLMCR) does not cause a transition to program mode or erase mode.
Details of software protection are given below.
Item
Description
Program
Functions
Erase
Verify^*
Block
protect
Programming and erase protection can be
set for individual blocks by settings in the
erase block registers (EBR1 and EBR2).
Disabled
Disabled
Enabled
Setting EBR1 to H'F0 and EBR2 to H'00
places all blocks in the program/erase-
protected state.
Note: * Three modes: program-verify, erase-verify, and prewrite-verify.
Rev. 6.00 Sep 12, 2006 page 148 of 526
REJ09B0326-0600