參數(shù)資料
型號: SAX-XC878M-16FFI5V
廠商: INFINEON TECHNOLOGIES AG
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 24 MHz, RISC MICROCONTROLLER, PQFP64
封裝: PLASTIC, TQFP-64
文件頁數(shù): 66/141頁
文件大小: 2385K
代理商: SAX-XC878M-16FFI5V
XC878CLM
Functional Description
Data Sheet
23
V1.1, 2009-08
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 XC878 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
can target the ROM contents.
P-Flash
program
and erase
Possible
Possible only on the
condition that MSB - 1
of password is set to 1
Possible only on the
condition that MSB - 1
of password is set to 1
D-Flash
contents
can be read
by
Read instructions in
any program memory
Read instructions in
any program memory
Read instructions in
the P-Flash or D-
Flash
External
access to D-
Flash
Not possible
D-Flash
program
Possible
Possible, on the
condition that MSB - 1
of password is set to 1
D-Flash
erase
Possible
Possible, on these
conditions:
MISC_CON.DFLASH
EN bit is set to 1
prior to each erase
operation; or
the
MSB - 1
of
password is set to 1
Possible, on the
condition that MSB - 1
of password is set to 1
Table 4
Flash Protection Modes (cont’d)
Flash
Protection
Without hardware
protection
With hardware protection
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