saf-xc878m-16ffi5v Infineon Technologies Corporation, saf-xc878m-16ffi5v Datasheet - Page 40

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

3.2.3.1
PASSWD
Password Register
Field
MODE
PROTECT_S
PASS
Data Sheet
7
Password Register
6
Bits
[1:0]
2
[7:3]
PASS
w
5
Type Description
rw
rh
w
Bit Protection Scheme Control Bits
00
11
Others:Scheme Enabled.
These two bits cannot be written directly. To change
the value between 11
must be written with 11000
MODE[1:0] be registered.
Bit Protection Signal Status Bit
This bit shows the status of the protection.
0
1
Password Bits
The Bit Protection Scheme only recognizes three
patterns.
11000
10011
10101
4
Scheme disabled - direct access to the
protected bits is allowed.
Scheme enabled - the bit field PASS has to be
written with the passwords to open and close
the access to protected bits. (default)
Software is able to write to all protected bits.
Software is unable to write to any protected
bits.
B
B
B
Enables writing of the bit field MODE.
Opens access to writing of all protected bits.
Closes access to writing of all protected bits
33
3
PROTECT
B
and 00
_S
rh
2
B
; only then, will the
Functional Description
B
, the bit field PASS
Reset Value: 07
1
MODE
XC87xCLM
V1.5, 2011-03
rw
0
H