SAF-XC886LM-8FFI INFINEON [Infineon Technologies AG], SAF-XC886LM-8FFI Datasheet - Page 24
SAF-XC886LM-8FFI
Manufacturer Part Number
SAF-XC886LM-8FFI
Description
8-Bit Single-Chip Microcontroller
Manufacturer
INFINEON [Infineon Technologies AG]
Datasheet
1.SAF-XC886LM-8FFI.pdf
(119 pages)
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3.2.1
The XC886/888 memory protection strategy includes:
• Read-out protection: The user is able to protect the contents in the Flash (for Flash
• Flash program and erase protection (for Flash devices only)
Flash memory protection modes are available only for Flash devices:
• Mode 0: Only the P-Flash is protected; the D-Flash is unprotected
• Mode 1: Both the P-Flash and D-Flash are protected
The selection of each protection mode and the restrictions imposed are summarized in
Table
Table 4
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. A
password match triggers an automatic erase of the protected P-Flash and D-Flash
contents, including the programmed password. The Flash protection is then disabled
upon the next reset.
Although no protection scheme can be considered infallible, the XC886/888 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
Prelimary
Mode
Activation
Selection
P-Flash contents
can be read by
P-Flash program
and erase
D-Flash contents
can be read by
D-Flash program Possible
D-Flash erase
devices) and ROM (for ROM devices) memory from being read
can target the ROM contents.
4.
Memory Protection Strategy
Flash Protection Modes
0
Program a valid password via BSL mode 6
MSB of password = 0
Read instructions in the
P-Flash
Not possible
Read instructions in any program
memory
Possible, on the condition that bit
DFLASHEN in register MISC_CON
is set to 1 prior to each erase
operation
20
1
MSB of password = 1
Read instructions in the
P-Flash or D-Flash
Not possible
Read instructions in the
P-Flash or D-Flash
Not possible
Not possible
Functional Description
XC886/888CLM
V0.1, 2006-02
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