参数资料
型号: SAL-XC886CLM-8FFA5V
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 80 MHz, MICROCONTROLLER, PQFP48
封装: GREEN, PLASTIC, TQFP-48
文件页数: 53/134页
文件大小: 864K
代理商: SAL-XC886CLM-8FFA5V
SAL-XC886CLM
Functional Description
Data Sheet
18
V1.0, 2010-05
3.2.1
Memory Protection Strategy
The SAL-XC886 memory protection strategy includes:
Read-out protection: The user is able to protect the contents in the Flash memory
from being read
– Flash protection is enabled by programming a valid password (8-bit non-zero
value) via BSL mode 6.
Flash program and erase protection.
3.2.1.1
Flash Memory Protection
As long as a valid password is available, all external access to the device, including the
Flash, will be blocked.
For additional security, the Flash hardware protection can be enabled to implement a
second layer of read-out protection, as well as to enable program and erase protection.
Flash hardware protection is available only for Flash devices and comes in two modes:
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 3
Flash Protection Modes
Flash Protection Without hardware
protection
With hardware protection
Hardware
Protection Mode
-0
1
Activation
Program a valid password via BSL mode 6
Selection
Bit 4 of password = 0 Bit 4 of password = 1
MSB of password = 0
Bit 4 of password = 1
MSB of password = 1
P-Flash
contents can be
read by
Read instructions in
any program memory
Read instructions in
the P-Flash
Read instructions in
the P-Flash or D-
Flash
External access
to P-Flash
Not possible
P-Flash program
and erase
Possible
Not possible
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
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