EN29PL032A datasheet(21/52 Pages) EON

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This Data Sheet may be revised by subsequent versions

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or modifications due to changes in technical specifications.

EN29PL032A

Rev. B, Issue Date: 2010/12/27

12.1 Customer- Lockable Secured Silicon Sector (64 words)

The Customer Lockable Secured Silicon Sector is always shipped unprotected (DQ0 set to “0”),

allowing customers to utilize that sector in any manner they choose. If the security feature is not

required, the Secured Silicon Sector can be treated as an additional Flash memory space.

Please note the following:

■ Once the Secured Silicon Sector area is protected, the Secured Silicon Sector Indicator Bit (DQ0) is

permanently set to “1”.

■ The Secured Silicon Sector can be read any number of times, but can be programmed and locked

only once. The Secured Silicon Sector lock must be used with caution as once locked, there is no

procedure available for unlocking the Secured Silicon Sector area and none of the bits in the Secured

Silicon Sector memory space can be modified in any way.

■ The accelerated programming (ACC) is not available when the Secured Silicon Sector is enabled.

■ Once the Secured Silicon Sector is locked and verified, the system must write the Exit Secured

Silicon Sector Region command sequence which return the device to the memory array at sector 0.

12.2 Secured Silicon Sector Protection Bits

The Secured Silicon Sector Protection Bits prevent programming of the Secured Silicon Sector memory

area. Once set, the Secured Silicon Sector memory area contents are non-modifiable.

Figure 12.1 Secured Silicon Sector Protect Verify

EN29PL032A Datasheet(PDF) 21 Page - Eon Silicon Solution Inc.