28HS01GTAM03 datasheet(41/138 Pages) INFINEON

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Datasheet

41 of 138

002-18216 Rev. *W

2022-01-18

256Mb/512Mb/1Gb SEMPER™ Flash

Octal interface, 1.8V/3.0V

Features

4.5

Data protection schemes

Data protection is required to safeguard against unintended changes to stored data and device configuration.

This includes inadvertent erasing or programming the memory array as well as writing to the configuration

registers, which can alter the functionality of the device. Three types of protection schemes are discussed which

range from protecting either a single or a group of sectors to either a portion or the complete memory array.

Figure 42 shows an overview of different protection schemes along with applicable data regions.

Figure 42

Data protection and security (write/program/erase) schemes

4.5.1

Legacy block protection (LBP)

The Legacy Block Protection (LBP), is a block based data protection scheme. LBP supports compatibility with

legacy serial NOR Flash devices. LBP provides protection for data in the memory array and device configuration

by protecting Status and Configuration registers.

4.5.1.1

Memory array protection

The protection for the memory array is with block size selection which is achieved through a combination of bits

present in the Status Register 1 (STR1N[4:2]/STR1V[4:2] - LBPROT[2:0]) and Configuration Register 1

(CFR1N[5]/CFR1V[5] - TBPROT). Table 17 provides the LBP memory array block selection summary

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