XC2000 datasheet(116/647 Pages) INFINEON

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XC2000 Derivatives

System Units (Vol. 1 of 2)

Memory Organization

Preliminary

User’s Manual

3-54

V1.0, 2007-06

MemoryX2K, V1.1

IMB control high word. The WPA and RPA fields are described in “Protection Handling

Details” on Page 3-38.

DDF

[15:14] rw

Disable Data Read from Flash Memory

“01”: Short notation DDF = 1. If RPA = 1 data cannot

be read from flash memory. If RPA = 0 this

field has no effect.

“10”: Short notation DDF = 0. Data can be read

independent of RPA.

“00” | “11”: Illegal state. Has the same effect as “01”.

This state can only be left by an Application

Reset.

During startup or test mode or when RPA = 0

software can change this field to any value.

Otherwise data reads can only be disabled but not

enabled anymore until the next Application Reset.

IMB_IMBCTRH

IMB Control High

ISFR (FF FF02H)

Reset value: 0005H

8765

432

PSPROT

–

RPA

WPA

–––

–

Field

Bits

Typ Description

WPA

[1:0]

Write Protection Activated

“01”: Short notation WPA = 1. The write protection

of the flash memory is activated.

“10”: Short notation WPA = 0. The write protection

is not activated.

“00” | “11”: Illegal state. Same effect as “01”. The

illegal state can only be left by an Application

Reset.

This field is only changed by the IMB Core. Software

writes are ignored.

Field

Bits

Typ Description

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