Protect Modes - Renesas F-ZTAT H8 Series Hardware Manual

19.5.8

Protect Modes

Flash memory can be protected from programming and erasing by software or hardware methods.
These two protection modes are described below.
Software Protection: Prevents transitions to program mode and erase mode even if the P or E bit
is set in the flash memory control register (FLMCR). Details are as follows.
Protection Description
Block Individual blocks can be erase and
protect program-protected by the erase block
registers (EBR1 and EBR2). If EBR1 and
EBR2 are both set to H'00, all blocks are
erase- and program-protected.
Emulation When the RAMS bit is set in the RAM
protect control register (RAMCR), all blocks are
protected from both programming and
erasing.
Notes: 1. Three modes: program-verify, erase-verify, and prewrite-verify.
2. Except in RAM areas overlapped onto flash memory.
3. All blocks are erase-disabled. It is not possible to specify individual blocks.
Section 19 Flash Memory (H8/3048F: Dual Power Supply (V
Function
Program Erase
Disabled Disabled
2
Disabled * Disabled *
Rev. 7.00 Sep 21, 2005 page 625 of 878
= 12 V))
PP
1
Verify *
Enabled
3
Enabled
REJ09B0259-0700