18.4.14 Flash Memory Protection - Renesas H8S Series Hardware Manual

Section 18 LPC Interface (LPC)

18.4.14 Flash Memory Protection

To protect the flash memory contents, the flash memory is divided into blocks given in figure
18.13. Protection for each block can be enabled or disabled by the setting of the WPB or RPB bits.
The write blocks are used in LPC/FW memory write cycles and the read blocks are used in
LPC/FW memory read cycles. Access to the flash memory with other than LPC/FW memory
cycles are not supported. The write block protection by the WPB bit is used to set/clear erase
block protection in the block erasure command.
All the blocks are protected by the initial values. When accessing to the flash memory, the
protection must be disabled. When the protection is disabled, 0 can be written to only once after
system reset. If the protection is enabled again after it has been disabled, the protection can be
disabled only by the system reset.
Rev. 3.00 Jul. 14, 2005 Page 705 of 986
REJ09B0098-0300