saf-xc878m-16ffi5v Infineon Technologies Corporation, saf-xc878m-16ffi5v Datasheet - Page 32

• Manufacturer Part Number: saf-xc878m-16ffi5v
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Infineon Technologies Corporation

Table 4
Flash
Protection
P-Flash
program
and erase
D-Flash
contents
can be read
by
External
access to D-
Flash
D-Flash
program
D-Flash
erase
BSL mode 6, which is used for enabling Flash protection, can also be used for disabling
Flash protection. Here, the programmed password must be provided by the user. To
disable the flash protection, a password match is required. A password match triggers
an automatic erase of the protected P-Flash and D-Flash contents, including the
programmed password. With a valid password, the Flash hardware protection is then
enabled or disabled upon next reset. For the other protection strategies, no reset is
necessary.
Although no protection scheme can be considered infallible, the XC87x memory
protection strategy provides a very high level of protection for a general purpose
microcontroller.
Note: If ROM read-out protection is enabled, only read instructions in the ROM memory
Data Sheet
can target the ROM contents.
Flash Protection Modes (cont’d)
Without hardware
protection
Possible
Read instructions in
any program memory
Not possible
Possible
Possible
With hardware protection
Possible only on the
condition that MSB - 1
of password is set to 1
Read instructions in
any program memory
Not possible
Possible
Possible, on these
conditions:
•
•
25
MISC_CON.DFLASH
EN bit is set to 1
prior to each erase
operation; or
the
password is set to 1
MSB - 1
of
Functional Description
Possible only on the
condition that MSB - 1
of password is set to 1
Read instructions in
the P-Flash or D-
Flash
Not possible
Possible, on the
condition that MSB - 1
of password is set to 1
Possible, on the
condition that MSB - 1
of password is set to 1
XC87xCLM
V1.5, 2011-03