Datasheet

Section 7 ROM
REJ09B0465-0300 Rev. 3.00 Page 229 of 982
Sep 17, 2010
H8S/20103, H8S/20203, H8S/20223, H8S/20115, H8S/20215, H8S/20235 Group
7.7.3 PROM Programmer Protection/Boot Mode Protection
PROM programmer protection/boot mode protection is enabled by writing the specified data to the
user ROM area shown in the table 7.13.
The protection function can be disabled by using a PROM programmer or on-board programmer
to delete the entire user ROM area.
Table 7.14 shows the specifications for PROM programmer protection and table 7.15 shows the
specifications of protection in boot mode.
Table 7.13 Address Range of the Protection Code in User ROM
H'000004 H'000005 H'000006 H'000007 H'000010 H'000011 H'000012 H'000013
PROM
programmer
Not used
Boot mode
Control
code
Authentication ID code (56 bits)
Table 7.14 Specifications for PROM Programmer Protection
Control code* Protection State Operation to be Carried Out
H'FF PROM programmer protection
is disabled.
Possible operations; reading/programming/
erasing by PROM programmer.
Other than above PROM programmer protection
is enabled.
Possible operations; programming/erasing by
PROM programmer.
However, reading is not possible.
Note: * Used together with control code for boot mode protection.