UM0116 datasheet(21/27 Pages) STMICROELECTRONICS

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UM0116

Flash memory protection

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Protection up to a maximum of 16 times. PENn can be programmed to 0 only if PDSn has

been already programmed to 0. PDSn can be programmed to 0 only if PDSn-1/PENn-1 have

been already programmed to 0.

Note:

You can not permanently unprotect a write protected sector.

3.4

3.4.1

Flash non volatile write protection register (FLASH_NVWPAR)

Address offset: 0x10 DFB0h

Delivery value: 0xFFFF FFFF

1) Not available in STR73x.

Reserved

W1P[1:0]1)

Reserved

W0P[7:0]

Bit 31:18

Reserved, must be kept at reset value (1).

Bit 17-16

W1P1-0: Write Protection Bank 1 sectors 1-0.

These bits, if programmed to 0, disable any writes to the sectors of bank 1.

The sectors corresponding to bits set to ‘0’ are Write protected.

Bit 15:8

Reserved, must be kept at reset value (1).

Bit 7:0

W0P(7:0): Write Protection Bank 0 sectors 7-0.

These bits, if programmed to 0, disable any writes to the respective sectors of

bank 0. The sectors corresponding to bits set to ‘0’ are Write protected.

UM0116 Datasheet(PDF) 21 Page - STMicroelectronics