XC888LM datasheet(37/144 Pages) INFINEON

37 / 144 page

XC886/888CLM

Functional Description

Data Sheet

V0.9, 2006-12

3.2.3.1

Password Register

PASSWD

Password Register

Reset Value: 07

76543210

PASS

PROTECT

MODE

Field

Bits

Type Description

MODE

[1:0]

Bit Protection Scheme Control Bits

Scheme Disabled.

Scheme Enabled (default).

Others:Scheme Enabled.

These two bits cannot be written directly. To change

the value between 11

B and 00B, the bit field PASS

must be written with 11000

B; only then, will the

MODE[1:0] be registered.

PROTECT_S

2rh

Bit Protection Signal Status Bit

This bit shows the status of the protection.

Software is able to write to all protected bits.

Software is unable to write to any protected

bits.

PASS

[7:3]

Password Bits

The Bit Protection Scheme only recognizes three

patterns.

11000

B Enables writing of the bit field MODE.

10011

B Opens access to writing of all protected bits.

10101

B Closes access to writing of all protected bits

XC888LM Datasheet(PDF) 37 Page - Infineon Technologies AG

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